掲載種別：研究論文（学術雑誌）  

Purpose: The purpose of this study is to confirm whether it is possible to acquire a certain degree of diagnostic ability even with a small dataset using domain-specific transfer learning. In this study, we constructed a simulated caries detection model on panoramic tomography using transfer learning. Methods: A simulated caries model was trained and validated using 1094 trimmed intraoral images. A convolutional neural network (CNN) with three convolution and three max pooling layers was developed. We applied this caries detection model to 50 panoramic images and evaluated its diagnostic performance. Results: The diagnostic performance of the CNN model on the intraoral film was as follows: C0 84.6%; C1 90.6%; C2 88.6%. Finally, we tested 50 panoramic images with simulated caries insertion. The diagnostic performance of the CNN model on the panoramic image was as follows: C0 75.0%, C1 80.0%, C2 80.0%, and overall diagnostic accuracy was 78.0%. The diagnostic performance of the caries detection model constructed only with panoramic images was much lower than that of the intraoral film. Conclusion: Domain-specific transfer learning methods may be useful for saving datasets and training time (179/250).

DOI： 10.1007/s40846-024-00848-w

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掲載種別：研究論文（学術雑誌）  

Purpose: The current supraomohyoid neck dissection (SOHND) is performed above the omohyoid muscle to dissect levels I, II, and III in the levels of cervical lymph nodes. However, the anatomical boundary between levels III and IV is the inferior border of the cricoid cartilage. We investigated the anatomical relationship between the omohyoid muscle and cricoid cartilage using contrast-enhanced CT (CE-CT) images to assess the validity of the current SOHND. Methods: CE-CT images of the head and neck regions in patients were reviewed. The patients were divided into two groups: “malignant tumors” and “others”. The vertebral levels corresponding to the positions of anatomical structures such as the intersection of the omohyoid muscle and internal jugular vein (OM-IJ), and the inferior border of the cricoid cartilage (CC), were recorded. Results: The OM-IJ was located around the seventh cervical to the first thoracic vertebra. There was a significant difference between the malignant tumor and others groups in females (p = 0.036). The CC was located around the sixth to seventh cervical vertebrae. There was a significant sex difference in each group (malignant tumor: p < 0.0001; others: p = 0.008). Both sexes tended to have lower OM-IJ than CC, and females had significantly lower OM-IJ than males. Conclusion: This study provides clear anatomical evidence showing the difference between the SOHND dissection area and levels I, II, and III. It could be considered that in most cases SOHND invades level IV, not just levels I, II, and III, especially in female patients.

DOI： 10.1007/s00276-024-03453-3

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Spandidos Publications  

The accurate diagnosis of vascular anomalies (VAs) is considered a challenging endeavor. Misdiagnosis of VAs can lead clinicians in the wrong direction, such as the performance of an unnecessary biopsy or inappropriate surgical procedures, which can potentially lead to unforeseen consequences and increase the risk of patient injury. The purpose of the present study was to develop an approach for the diagnosis of VAs of the oral and maxillofacial region based on computed tomography (CT), magnetic resonance imaging (MRI) and dynamic contrast-enhanced MRI (DCE-MRI). In the present study, the CT and MR images of 87 VAs were examined, and the following imaging features were evaluated: Detectability of the lesion, the periphery of the lesion, the inner nature of the lesion, the density of the lesion on CT, the signal intensity of the lesion on MRI, the detectability of phleboliths and the shape of the lesion. A total of 29 lesions were further evaluated using the contrast index (CI) curves created from the DCE-MRI images. A diagnostic diagram, which is based on the imaging features of VAs and CI curve patterns, was subsequently extrapolated. The results obtained demonstrated that the VAs were detected more readily by MRI compared with CT, whereas the detectability of phleboliths was superior when using CT compared with MRI. VAs showed a propensity for homogeneous isodensity on CT, whereas, by contrast, they exhibited a propensity for heterogeneous hyperdensity on CE-CT. VAs also showed a propensity for homogeneous intermediate signal intensity when performing T1-weighted imaging (T1WI), heterogeneous high signal intensity when performing short tau inversion recovery MRI, and heterogeneous high signal intensity when performing fat-saturated CE-T1WI. The CI curves of VAs were found to exhibit a specific pattern: Of the 29 CI curves, 23 (79.3%) showed early weak enhancement, followed by a plateau leading up to 400-600 sec. An imaging-based diagnostic diagram was ultimately formulated. This diagram can act as an aid for radiologists when they are expecting to find a VA, and hopefully serve the purpose of simplifying the diagnostic process. Taken together, the findings of the present study indicated that DCE-MRI may be considered a useful tool for the diagnosis of VAs.

DOI： 10.3892/ol.2023.13980

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記述言語：日本語   出版者・発行元：(一社)日本口腔内科学会  

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記述言語：英語  

A collision tumor refers to the coexistence of two diagnostically distinct tumors in a common anatomic space. Collision tumors are rare in the oral and maxillofacial region. The present study reported on the case of an 82-year-old female with a collision tumor in the maxillary sinus consisting of small cell carcinoma (SmCC) and squamous cell carcinoma (SCC). Computed tomography (CT) imaging revealed a mass in the right maxillary sinus. The lesion exhibited heterogeneous low signal intensity (SI) on T1-weighted imaging (T1WI), high SI on short T1 inversion recovery and heterogeneous solid enhancement on contrast-enhanced T1WI. The histopathology result of a biopsy specimen confirmed SmCC. After the patient received a course of chemoradiotherapy, follow-up CT revealed a residual tumor. In a second surgery, a remaining tumor and histopathology revealed SCC with no evidence of SmCC. The final diagnosis was a collision tumor made up of SCC and SmCC.

DOI： 10.3892/mco.2022.2529

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

OBJECTIVES: To examine the diagnostic usefulness and procedures of ultrasonography (US) for mass lesions in the soft tissue of the oral region. METHODS: This study involved patients with mass lesions (tumorous lesions and cysts) who had undergone US and histopathological examinations from January 2017 to December 2019. The following points were evaluated by two observers using an evaluation scale: vascularity, echo intensity level, boundary, margin shape, distribution of internal echoes, and capsule. The usefulness of each point for differential diagnosis of tumorous lesions and cysts was statistically analyzed. RESULTS: Forty-five mass lesions in the soft tissue of the oral region (33 tumorous lesions and 12 cysts) were analyzed. There were significant differences in four evaluation points between the tumorous lesions and cysts: vascularity, echo intensity level, boundary, and margin shape. Cysts were almost completely excluded diagnostically, especially when vascularity was observed. There were also significant differences in two evaluation points between nonvascular tumorous lesions and cysts: echo intensity level and boundary. CONCLUSIONS: In US examination for mass lesions in the oral region, it was possible to diagnose tumorous lesions and exclude cysts when vascularity was observed. When vascularity was not observed, however, tumorous lesions and cysts could be identified using two evaluation points: echo intensity level and boundary.

DOI： 10.1007/s11282-022-00605-2

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Purpose: To focus on the effects of the presence of mesiodens on adjacent teeth and to investigate the timing of its safe removal. Materials and Methods: Cone-beam computed tomography examinations, obtained at Okayama University Hospital over a three-year period, were inspected. Data were recorded including the number of mesiodens; associated abnormalities; and the relationship with neighboring structures. Depending on multiple factors, the risk of developing complications due to early extraction of a mesiodens was divided into three categories: high, medium, and low risk. Results: A total of 5,958 cone-beam computed tomography exams were obtained, 460 patients aged 3-85 years were diagnosed with a total of 568 mesiodens, 382 (67.3%) of which were discovered in young patients (age <10 years), and 333 (87.2%) of these were associated with abnormalities. Regarding the risk categories, 11 (1.9%) were considered to be in the high-risk, five (0.9%) in the medium-risk and 552 (97.2%) in the low-risk categories. Moreover, eight out of 11 high-risk mesiodens were extracted and no post-operative complications have been seen. Conclusion: As the results showed that no postoperative complications were seen in all the extracted cases of high-risk mesiodens, this indicates the possibility of safe extraction at an early age which could reduce related future complications.

DOI： 10.5624/isd.20210218

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPANDIDOS PUBL LTD  

Immune checkpoint inhibitors (ICIs) targeting programmed death ligand-1 (PD-L1) are highly promising therapies for oral squamous cell carcinoma (OSCC). The assessment of PD-L1 expression may help predicting the therapeutic effect of ICIs and, thus, benefit patient selection. Contrast index (CI) parameters derived from dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) have been proven as efficient to assess microvessel density (MVD) in OSCC. The present study aimed to determine the correlation between DCE-MRI parameters and MVD and between DCE-MRI parameters and PD-L1 expression to determine whether DCE-MRI could be used non-invasively to evaluate PD-L1 expression in patients with OSCC. A total of 21 patients with primary OSCC who had undergone a 3T MRI scan, including DCE-MRI, were included in the present study, and CI curve-derived parameters were examined. The MVD and PD-L1 expression in the surgically resected specimens were analyzed using immunohistochemistry (IHC) staining for CD31 and IHC staining for PD-L1, respectively. The results demonstrated that the expression levels of these markers were correlated with DCE-MRI parameters. PD-L1 expression levels were found to be significantly correlated with the maximum CI (CI-max; P=0.007), peak CI (CI-peak; P=0.007), maximum CI gain (CI-gain; P=0.006) and MVD (P=0.001) values. The mean CI-max, CI-peak, CI-gain and MVD values were significantly higher in tumors with high PD-L1 expression (P<0.05). MVD levels were also significantly correlated with the time of CI-max (T-max; P=0.003) and CI-gain (P=0.037). The mean CI-gain was significantly increased, and the mean T-max was significantly shorter in high MVD tumors (P<0.05 and P<0.01, respectively). In summary, the findings from the present study confirmed the correlation between CI parameters, derived from DCE-MRI, and MVD, and suggested that these parameters may be correlated with PD-L1 expression in OSCC tumor cells.

DOI： 10.3892/ol.2021.13039

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

OBJECTIVES: The purpose of this study was to evaluate the usefulness of Hounsfield unit (HU) assessment with multislice-CT in the differentiation of radicular cysts (RCs), dentigerous cysts (DCs) and odontogenic keratocysts (OKCs). METHODS: In total, 307 odontogenic cysts (RCs, DCs and OKCs) were included in this study. Cysts with lesion diameter <10 mm, cysts with artefacts affecting measurement of HU values, cysts involving infection and recurrent cysts were regarded as exclusion criteria. Images were acquired in three different types of CT scanners: Aquilion ONE, Discovery CT750 HD and SOMATOM Definition Flash. Differences in HU values among scanners and among types of odontogenic cysts were assessed using one-way analysis of variance; multiple comparisons were performed post hoc, using the Tukey-Kramer honestly significant difference test. RESULTS: In total, 164 cysts were analysed in this study (64 RCs, 57 DCs and 43 OKCs). Regardless of the type of lesion, the Aquilion ONE scanner demonstrated a significant difference in HU value, compared with the Discovery CT750 HD scanner. Regardless of CT scanner model, HU values significantly differed between DCs and OKCs (p < 0.0001), as well as between OKCs and RCs (p < 0.0001). CONCLUSIONS: HU values were found to vary among CT scanners and should always be associated with other lesion imaging features while interpreting and elaboration diagnostic hypothesis. Notably, the results suggested that OKCs might be able to be differentiated from DCs and RCs by using HU values.

DOI： 10.1259/dmfr.20200188

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPANDIDOS PUBL LTD  

The numbers of abnormal findings incidentally detected in adjacent regions are increasing with advances in imaging modalities. The present study aimed to examine the prevalence and characteristics of incidental findings in the thyroid gland on computed tomography (CT) images of the oral and maxillofacial region. CT scans of the oral and maxillofacial region in patients obtained between January 2012 and December 2016 were retrospectively reviewed. Images that revealed incidental findings in the thyroid gland, including nodules, were recorded, together with the sizes and characteristics of the findings. The Japan Association of Breast and Thyroid Sonology (JABTS) guidelines were used for classification. The rate of descriptions of these findings in the radiographic interpretation reports were also examined. Of the 1,135 patients examined, 326 (28.7%) had several types of incidental findings. In particular, 169 (14.9%) of the 1,135 patients had nodules >5 mm in diameter, for which further careful examination is recommended in the JABTS guideline. The description rate for nodules >5 mm in diameter in the radiographic interpretation reports was 30.8% (52/169 patients), of whom 17.3% (9/52 patients) were referred to the endocrinology department for further careful examination. Incidental findings in the thyroid gland were relatively common on CT images of the oral and maxillofacial region. Oral radiologists tend to focus specifically on the oral and maxillofacial region during diagnosis on oral and maxillofacial CT images, but should pay the same careful attention to observe adjacent regions, such as the thyroid gland.

DOI： 10.3892/ol.2020.11298

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER  

Adenoid cystic carcinoma (ACC) is a rare epithelial tumor of the head and neck region, and one of the most common malignant tumors of the salivary glands. ACC is a slow-growing tumor characterized by perineural invasion and often has a high-recurrence rate. We describe a case of oropharyngeal ACC invading the mandibular bone through the mandibular foramen that showed a rare pattern of origin and invasion. A 70-year-old woman complained of noise and pain around the right temporomandibular joint. Osteomyelitis was suspected on the initial imaging examinations, although the findings were slightly atypical. However, a mass was observed in the right oropharyngeal wall on subsequent imaging examinations, and mandibular bone invasion, rather than osteomyelitis, was additionally suspected. The mass in the right oropharyngeal wall and right mandible was surgically excised. On postoperative histopathological examination, the mass was finally diagnosed as ACC. As tumor cells were also observed around the inferior alveolar nerve, mandibular bone invasion through the mandibular foramen was suspected. An oropharyngeal ACC invading the mandibular bone through the mandibular foramen is extremely rare. The present case suggests that bone invasion should be considered carefully with several imaging examinations when a malignant tumor such as ACC is observed around the jaw bone.

DOI： 10.1007/s11282-018-0359-3

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記述言語：日本語   出版者・発行元：岡山歯学会  

歯学部学生の臨床前基礎実習において透明根管模型歯は、全ての学生が同一条件下で実習を行えることや、根管治療における各ステップを目視できる等の利点がある。今回、本学歯学部4年次生47名が象牙質歯髄複合体診断・治療学実習の実技試験で根管充填を行った透明根管模型歯について、視診による評価と、デジタルX線画像のモニタ上での視診による評価、およびデジタルX線画像を画像解析ソフト(ImageJ)により解析した評価を行い、各評価法の妥当性について比較検討した。その結果、画像解析ソフトで解析する方法は成績の過小評価を防ぐうえで有用であり、より客観的な評価が可能と考えられた。

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：KOREAN ACAD ORAL & MAXILLOFACIAL RADIOLOGY  

Purpose: The prevalence of supernumerary teeth has been reported to be between 0.1% and 3.8%. The aim of this study was to determine the prevalence, clinical significance, and associated pathologies of fourth molars based on a retrospective study and a literature review. Materials and Methods: A 5-year retrospective prevalence study was conducted at the Department of Oral Diagnosis and Dentomaxillofacial Radiology of Okayama University Hospital, Okayama, Japan. The study involved extracting data from the digital records of patients from January 1, 2013 through December 31, 2017. The sampling frame included all patients who had panoramic radiographs, cone-beam computed tomography (CT), and multislice CT images during the period under review. Results: A total of 26,721 cases were reviewed and 87 fourth molars were identified. The prevalence of fourth molars in the 5-year study at Okayama was calculated as 0.32%. The mean age of patients with a fourth molar was 30.43 years, and the male-to-female ratio was 1:0.98. The vast majority of cases were in the maxilla (92%) and had normal shapes (89.7%); furthermore, 82.8% of cases were unerupted. Conclusion: The prevalence of fourth molars in the study population was found to be 0.32%, and fourth molars occurred with approximately equal frequency in males and females. Fourth molars were more common in the maxilla and were predominantly unerupted and small.

DOI： 10.5624/isd.2019.49.1.27

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：BRITISH INST RADIOLOGY  

OBJECTIVES: To investigate the correlations among various temporomandibular joint (TMJ) findings on MRI and the relationships between MRI findings and symptoms. METHODS: 425 patients (850 TMJs) with temporomandibular joint disorders (TMDs) who underwent MRI were enrolled. Oblique sagittal proton density-weighted and T2 weighted images in open- and closed-mouth positions were evaluated. MRI findings included disc configuration, disc position, condylar morphology, bone marrow pattern, and joint effusion. Symptoms included TMJ pain, TMJ noise, and limitation of mouth opening. For statistical analyses, Spearman's rank correlation coefficient and logistic regression analysis were applied. RESULTS: Folded disc, disc displacement without reduction (DDWOR), and osteophytes had significant negative correlations with other normal MRI findings (p < 0.01). DDWOR and marrow edema were associated with TMJ pain. Conversely, osteophytes [odds ratio (OR): 0.52; 95% CI (0.30-0.90)] and combination-type condylar degeneration [OR: 0.45; 95% CI (0.24-0.83)] were associated with decreased risk of TMJ pain. Condylar flattening was positively associated with TMJ noise [OR: 5.25; 95% CI (1.44-19.07)] and negatively associated with limitation of mouth opening [OR: 0.34; 95% CI (0.11-0.99)]. High-grade joint effusion was significantly associated with TMJ pain and noise. CONCLUSIONS: DDWOR and high-grade joint effusion (an indicator of inflammation in the articular cavity) were associated with TMD symptoms. This finding suggests that treatment strategy for DDWOR and decreasing inflammation might lessen clinical TMD symptoms. Condylar degeneration was not associated with indicators of inflammation or TMJ symptoms. These results suggest that patients with TMD symptoms should undergo initial MRI to allow rapid selection of appropriate therapies.

DOI： 10.1259/dmfr.20170412

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPANDIDOS PUBL LTD  

The number of significant incidental findings identified on radiographic examinations has increased. In total, 169 patients, 87 males and 82 females, with a mean age of 67.3 years (range, 17-92 years), as well as 65 patients (38.5%), 43 (66.2%) female and 22 (33.8%) male had abnormal findings in the thyroid for one year in our institution. Thyroid nodules are the most common incidental findings on oral and maxillofacial evaluations. Computed tomography (CT) and magnetic resonance imaging (MRI) examination are frequently used to detect thyroid abnormality. The present study reported a case of papillary thyroid carcinoma (PTC) detected following CT and MRI examination of a mandibular lesion. The CT examination of the oral and maxillofacial region included the thyroid, which must be examined carefully to detect various diseases, including PTC. Collaboration between radiologists and clinicians is important to manage these incidental findings.

DOI： 10.3892/mco.2017.1478

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOURNAL HARD TISSUE BIOLOGY  

Contrast-enhanced (CE)-MR image is useful to distinguish cystic and solid portions on multilocular lesion, however, the CE-MR examination is contraindicated in patients with kidney disease. Fluid-attenuated inversion recovery (FLAIR) image is one of methods which signal of fluid is suppressed. This study investigated qualitatively and quantitatively whether FLAIR images were useful for detecting and differentiating cystic and solid portions of multilocular ameloblastomas. We retrospectively reviewed 11 cases of multilocular ameloblastoma. FLAIR and short Ti inversion recovery (STIR) sequences were performed in all cases. CE-MR images in 10 cases, and T1-weighted images (T1WI) in 7 cases. FLAIR, STIR, CE-MR, and T1WI images were visually evaluated (qualitative analysis). Signal-to-noise ratio (SNR) of cystic and solid portions were measured and compared among the images of all sequences (quantitative analysis). FLAIR imaging could detect cystic portions with very low SI in all cases because cystic fluid was well suppressed on the images, and the solid portion showed intermediate SI. On some STIR images, the solid portion was masked by the markedly high SI of the cystic fluid. CE-T1WI and CE-FLAIR images showed no enhancement of the cystic portion but enhancement of the solid portion. On FLAIR image, SNR of solid was higher than cystic portion (p < 0.05). Cystic and solid portions of a lesion could be detected and distinguished on FLAIR imaging. FLAIR images are thus useful for diagnosing multilocular ameloblastoma when CE-MR cannot be performed.

DOI： 10.2485/jhtb.27.275

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担当区分：筆頭著者   記述言語：日本語   出版者・発行元：岡山歯学会  

腫瘍の増殖能や転移能に関与する生体内分子を標的とした陽電子断層撮影法(PET)のプローブを作製し、腫瘍の機能的な病態を画像上で予測することを目的とした。実験動物には7週齢BALB/cAJcl-nu/nuヌードマウスを用いた。PETプローブの作製、PET撮像および画像解析、ガンマカウンターを用いた%ID/g tissue値の計測、上皮成長因子受容体(EGFR)発現の免疫組織学的検討を行った。その結果、頭頸部癌に用いられる抗癌剤であるセツキシマブを89Zrで標識したものをPETプローブとして用いることで、EGFRの発現を可視化し、頭頸部癌のセツキシマブ感受性の評価を画像上で非侵襲的に行うことが可能となった。放射性核種の選択によっては、診断のみならず治療に応用できる可能性が考えられた。臨床応用を考える際には、放射性核種の半減期やプローブの代謝経路を考慮し、腫瘍部位以外での被曝についても検討していく必要があると考えられた。

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER  

It is known that the magnetic resonance (MR) imaging features of dentigerous cysts (DCs) are the same as those of other cysts. The cavities of DCs generally show low signal intensity (SI) on T1-weighted imaging (T1WI). However, in our experience, DCs often show high SI on T1WI, rendering them difficult to distinguish from keratocystic odontogenic tumors (KCOTs). In this study, we evaluated seven cases of DC and 23 cases of KCOT to assess whether MR imaging can provide additional information for the differential diagnosis of DC and KCOT.Two trials were evaluated. The first trial was an analysis of the cystic cavity SI on T1WI. To compare the SI between patients, we performed T1WI with contrast (T1c). The second trial analyzed the SI uniformity (U (I )) pound on T1WI, T2-weighted imaging (T2WI), and short inversion time inversion recovery (STIR) images of the cystic cavity, because it has been reported that an MR imaging feature of KCOT is heterogeneous SI. Statistical analyses were performed using the Mann-Whitney U test and a receiver operating characteristic (ROC) curve.The T1c values of DCs were significantly higher than those for KCOTs. The U (I ) pound values on T1WI and STIR images were significantly higher for DCs than for KCOTs. The T1c cutoff values (0.66 and 0.84) and U (I ) pound cutoff values for T1WI (82.1 %) and STIR images (79.8 %) were determined from the ROC analyses.T1c and U (I ) pound values provide useful additional information for the differential diagnosis of DC and KCOT.

DOI： 10.1007/s11282-013-0128-2

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記述言語：英語   出版者・発行元：(NPO)日本口腔科学会  

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記述言語：日本語   出版者・発行元：日本法歯科医学会  

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記述言語：日本語   出版者・発行元：(NPO)日本歯科放射線学会  

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記述言語：日本語   出版者・発行元：日本法歯科医学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔診断学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔診断学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔診断学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔診断学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔内科学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔内科学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔内科学会  

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記述言語：日本語   出版者・発行元：(NPO)日本法医学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔内科学会  

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記述言語：日本語   出版者・発行元：(NPO)日本歯科放射線学会  

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記述言語：日本語   出版者・発行元：(NPO)日本法医学会  

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記述言語：日本語   出版者・発行元：(NPO)日本法医学会  

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記述言語：日本語   出版者・発行元：(NPO)日本歯科放射線学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔診断学会  

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記述言語：日本語   出版者・発行元：岡山歯学会  

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記述言語：日本語   出版者・発行元：(NPO)日本口腔科学会  

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記述言語：日本語   出版者・発行元：(NPO)日本歯科放射線学会  

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記述言語：日本語   出版者・発行元：(NPO)日本歯科放射線学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔診断学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔診断学会  

J-GLOBAL

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記述言語：日本語   出版者・発行元：日本画像医学会  

J-GLOBAL

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記述言語：日本語   出版者・発行元：岡山歯学会  

J-GLOBAL

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記述言語：日本語   出版者・発行元：(一社)日本口腔内科学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔内科学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔診断学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔診断学会  

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記述言語：日本語   出版者・発行元：(一社)日本口腔内科学会  

J-GLOBAL

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記述言語：日本語   出版者・発行元：(一社)日本口腔内科学会  

J-GLOBAL

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記述言語：日本語   出版者・発行元：岡山歯学会  

Audience Response Systemは、講演や講義において講演者の質問やアンケートにリモコンを通して聴衆者がリアルタイムに答えることができる双方向式システム(クリッカー)である。歯科放射線学分野の講義において、歯学部4年次学生52名を対象に、学習意欲と理解力を高めると共に集中力を持続させることおよび理解度の把握を目的として、クリッカーを用いた参加型講義を実施した。講義後にアンケートを行った結果、98%が「総合的にクリッカーは講義に有効であった」と回答した。クリッカーを使用した参加型講義について、「講義への出席意欲・興味が高まった」98%、「講義内容の理解に役立った」100%、「授業に集中できた」94%と、極めて高い肯定的回答率が得られた。

J-GLOBAL

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記述言語：日本語   出版者・発行元：岡山歯学会  

「歯科放射線学分野」の講義試験としてe-learning(WebClassシステム)によるPCを用いた試験を試み、受験生56名に試験後アンケート調査を行ってその有用性について検討した。肯定的回答(大変そう思う・そう思う)の割合は、PC使用試験については「共用試験CBTの予行として役立つ」100%、「試験解説がすぐに受けられる」93%、「試験結果がすぐに公表される」78%で、低かったのは「試験に集中しやすい」46%、「システムの使用が難しい」49%であった。試験会場については「席による不公平がない」91%、「講義室からの移動が面倒」71%であった。視覚素材については、「あると問題が理解しやすい」96%、「問題が難しくなる」52%であった。試験内容(選択問題)については、「国家試験、CBTの予行になる」「採点結果が明確」100%、「理解度をアピールしにくい」72%、「楽だ」35%、「語彙力、理解力低下につながる」47%であった。共用試験CBT後のアンケートではPC使用試験が「予行として役立った」98%であった。

J-GLOBAL

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開催年月日： 2024年4月11日 - 2024年4月14日

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開催年月日： 2023年11月10日 - 2023年11月12日

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開催年月日： 2023年11月3日 - 2023年11月5日

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開催年月日： 2023年10月27日 - 2023年10月29日

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開催年月日： 2023年5月26日 - 2023年5月28日

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開催年月日： 2023年5月26日 - 2023年5月28日

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開催年月日： 2023年4月13日 - 2023年4月15日

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開催年月日： 2023年1月26日 - 2023年2月28日

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開催年月日： 2023年1月26日 - 2023年2月28日

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開催年月日： 2022年10月7日 - 2022年10月9日

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開催年月日： 2022年10月7日 - 2022年10月9日

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開催年月日： 2022年10月7日 - 2022年10月9日

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開催年月日： 2022年9月22日 - 2022年9月24日

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開催年月日： 2022年6月3日 - 2022年6月4日

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開催年月日： 2021年10月29日 - 2021年10月31日

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開催年月日： 2021年9月23日 - 2021年9月25日

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開催年月日： 2021年9月23日 - 2021年9月25日

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開催年月日： 2021年5月21日 - 2021年5月23日

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開催年月日： 2021年4月28日 - 2021年5月1日

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開催年月日： 2021年4月28日 - 2021年5月1日

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開催年月日： 2021年4月28日 - 2021年5月1日

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開催年月日： 2021年4月22日 - 2021年4月24日

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開催年月日： 2020年12月5日

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2020年10月31日 - 2020年11月1日

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2020年10月31日 - 2020年11月1日

記述言語：英語   会議種別：口頭発表（一般）  

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開催年月日： 2020年10月18日

記述言語：日本語  

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開催年月日： 2020年10月18日

記述言語：日本語  

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開催年月日： 2019年12月7日

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2019年11月22日 - 2019年11月24日

記述言語：英語   会議種別：口頭発表（一般）  

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開催年月日： 2019年8月22日 - 2019年8月25日

会議種別：ポスター発表  

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開催年月日： 2019年6月14日 - 2019年6月16日

会議種別：口頭発表（一般）  

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開催年月日： 2019年3月8日 - 2019年3月9日

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2019年1月12日

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2018年10月21日

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2018年10月12日 - 2018年10月14日

会議種別：口頭発表（一般）  

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開催年月日： 2018年10月6日

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2018年9月14日 - 2018年9月15日

会議種別：ポスター発表  

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開催年月日： 2018年9月6日 - 2018年9月9日

記述言語：英語   会議種別：ポスター発表  

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開催年月日： 2018年5月25日 - 2018年5月27日

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2018年5月25日 - 2018年5月27日

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2018年5月11日 - 2018年5月13日

記述言語：英語   会議種別：口頭発表（一般）  

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開催年月日： 2018年5月11日 - 2018年5月13日

記述言語：英語   会議種別：口頭発表（一般）  

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開催年月日： 2017年12月9日

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2017年11月10日 - 2017年11月12日

記述言語：英語   会議種別：ポスター発表  

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開催年月日： 2017年11月10日 - 2017年11月11日

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2017年9月8日 - 2017年9月9日

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2017年9月8日 - 2017年9月9日

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2017年9月8日 - 2017年9月9日

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2017年9月8日 - 2017年9月9日

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2017年6月2日 - 2017年6月4日

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2017年4月26日 - 2017年4月29日

記述言語：英語   会議種別：ポスター発表  

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開催年月日： 2017年4月26日 - 2017年4月29日

記述言語：英語   会議種別：ポスター発表  

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開催年月日： 2016年11月10日 - 2016年11月12日

記述言語：英語   会議種別：ポスター発表  

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開催年月日： 2016年11月

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2016年10月

会議種別：口頭発表（一般）  

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開催年月日： 2016年10月

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2016年10月

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2016年6月

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2015年10月

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2015年10月

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2015年10月

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2015年10月

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2015年9月

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2015年7月

会議種別：口頭発表（一般）  

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開催年月日： 2015年6月

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2015年6月

記述言語：日本語   会議種別：ポスター発表  

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開催年月日： 2013年6月24日 - 2013年6月27日

記述言語：英語   会議種別：ポスター発表  

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会議種別：口頭発表（一般）  

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会議種別：口頭発表（一般）  

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