Faculty Profiles - GOTO Sachiko

MISC - GOTO Sachiko

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Characteristic of GAFCHROMIC XR TYPE T dosimetry film

14 ( 1 ) 23 - 29 2003.12

Shape Measurement of BGA for Analysis of Defects by X-Ray Imaging

T. Sumimoto, T. Maruyama, Y. Azuma, S. Goto, M. Mondou, N. Furukawa, S. Okada

Instrumentation and Control Technology 2003

Classification of the mammographic breast density by the histogram approach using neural networks

Sachiko Goto, Yoshiharu Azuma, Tetsuhiro Sumimoto, Shigeru Eiho

Instrumentation and Control Technology 2003

Image Analysis Techniques for the Detection of Defectsat BGA by X-Ray

T. Sumimoto, T. Maruyama, Y. Azuma, S. Goto, M. Mondou, N. Furukawa, S. Okada

ADC Modeling and Testing 2003

Development of image analysis for detection of defects of BGA by using x-ray images

T Sumimoto, T Maruyama, Y Azuma, S Goto, M Mondou, N Furukawa, S Okada

IMTC/O3: PROCEEDINGS OF THE 20TH IEEE INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE, VOLS 1 AND 2 1131 - 1136 2003

Language：English Publisher：IEEE

In the surface mount technology, Ball Grid Array (BGA) has been used in a production of PC boards, because of their excellent characters such as high density of the lead pin pitch, better lead rigidity and self-alignment during re-flow processing. This paper deals with the development of image analysis for the detection of defects at BGA solder joints in PC boards by using X-ray images. In the conventional IC boards, it is possible to detect defects of solder joints by visual inspection, because the lead of IC package is set on its outside. However, we can't detect visually defects at BGA solder joints, because they are hidden under the IC package. In a production line, the inspection of BGA in PC boards depends on the function test of electric circuits in the final process. To improve a cost performance and the reliability of PC boards, an inspection of BGA is required in the surface mount process. Types of defects at BGA solder joints are solder bridge, missing connection, solder voids, open connection and miss-registration of parts. As we can find mostly solder bridge in these defects, we pick up this to detect solder bridge in a production line. The problems of image analysis for the detection of defects at BGA solder joints are the detection accuracy and image processing time according to a line speed of production. To get design data for the development of the inspection system, which can be used easily in the surface mount process, it is important to develop image analysis techniques based on X-ray image data. At the first step of our study, we attempt to detect the characteristics of the solder bridges based on an image analysis.

Web of Science

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Estimation of the digitized mammographic breast density by the histogramapproach using theneural network

Sachiko Goto, Yoshiharu Azuma, Tetsuhiro Sumimoto, Yoshihiro Takeda, Shigeru Eiho

ADC Modeling and Testing 2003

Detection of defects at BGA solder joints by using X-ray imaging

Sumimoto Tetsuhiro, Maruyama Toshinori, Azuma Yoshiharu, Goto Sachiko, Mondou Munehiro, Furukawa Noboru, Okada Saburo

Industrial Technology 1 191 - 196 2002

Image Analysis for Detection of Defects of BGA by Using X-ray Imaging

Sumimoto T, Maruyama T, Azuma Y, Goto S, Mondo M, Okada S

Proceeding of International Conference on Contorol, Automation and Systems 2002

A Neural Network Approach to Classification on Mammographic Density

Goto S, Azuma Y, Sumimoto T, Eiho S

2nd European Medical and Biological Engineering Confernce 2002

Development of Measurement System for Patient Exposure Dose on X-Ray Screening Mammography

Sachiko Goto, Yoshiharu Azuma, Tetsuhiro Sumimot, Toshinori Marnyama, Shigeru Eiho

Proceedings of Environmental Signal Processing and Noise Controlling Techllology 2001

Measurement of Patient Exposure Dose on X-Ray Screening Mammography

Sachiko Goto, Yoshiharu Azuma, Tetsuhiro Sumimoto, Toshinori Maruyama, Shigeru Eiho

Proceeding of the 18th IEEE Instrumentation and Measurement Technology Conference 2001

Computer Assisted System for Breast Dosimetry on Mammography

Sachiko Goto, Yoshiharu Azuma, Toshinori Maruyam, Yoshihiro Takeda, Yoshio Hiraki

Computer Assisted Radiology and Surgery Proceedings of the 14th International Congress and Exhibition 2000

Computer Assisted System for Breast Dosimetry on Mammography

Proceedings of the 14th International Congress and Exhibition Computer Assisted Radiology and Surgery CARS 2000 1214 1007 2000

Evaluation of Breast Composition for Radiation Absorbed Dose in Mammography

Sachiko Goto, Yoshiharu Azuma, Toshinori Maruyam, Yoshihiro Takeda, Masami Azuma

Medical Physics 2000

乳房X線撮影における医療被曝

第9回計測自動制御学会中国支部学術講演会論文集 610-611 2000

Computer Assisted System for Breast Dosimetry on Mammography

Proceedings of the 14th International Congress and Exhibition Computer Assisted Radiology and Surgery CARS 2000 1214 1007 2000

Evaluation of Breast Composition for Radiation Absorbed Dose in Mammography

Med. Phys Vol.27 No.6 1399 2000

診断領域Ｘ線の測定と被曝低減について

中桐義忠, 杉田勝彦, 東義晴, 渋谷光一, 後藤佐知子

文部省科研費研究課題の成果 2000

Evaluation of Breast Composition for Radiation Absorbed Dose in Mammography

Med. Phys Vol.27 No.6 1399 2000

診断領域Ｘ線の測定と被曝低減

中桐義忠, 丸山敏則, 後藤佐知子, 東義晴, 渋谷光一, 杉田勝彦

INNERVISION 2000

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