All issues
Volume 27 (2010)
- Issue 4 Pages 61-
- Issue 3 Pages 50-
- Issue 2 Pages 22-
- Issue 1 Pages 1-
Volume 27, Issue 2
Displaying 1-6 of 6 articles from this issue
- |<
- <
- 1
- >
- >|
Invited Lecture
-
Yoichi MIYAKE2010 Volume 27 Issue 2 Pages 22-25
Published: 2010
Released on J-STAGE: June 04, 2010
JOURNAL FREE ACCESSResearch Center for Frontier Medical Engineering, Chiba University (CFME) was found in 2003 cooperated with Medical School and Faculty of Engineering for promotion of the research on the medical engineering. In the CFME, many project researches have been done for clinical applications. For example, at the Joint-Industry-Academia-Government Cooperative Project, we are developing a new device with low-cost, non-invasive, high resolution and reliability for diagnosis of metabolic syndrome and lifestyle diseases such as examining the arteriosclerosis by vascular pathology and image analysis, a new system for global higher brain function, a new diagnosis system for skin and membrane based on the color and spectral imaging, the elasticity and the ultrasonic examination equipment for a visceral fat. In the presentation, these research topics are introduced and some clinical applications using those developed systems are also described.View full abstractDownload PDF (3985K) -
Eiji OSHIDA2010 Volume 27 Issue 2 Pages 26-28
Published: 2010
Released on J-STAGE: June 04, 2010
JOURNAL FREE ACCESSSoftware cannot be submitted independently for the pre-market approval review under the Pharmaceutical Affairs Law (PAL) in Japan even if the software has the functions that meet the definition of Medical devices. Software must be installed into multipurpose hardware like personal computers (PCs) for the pre-market approval review. Consequently, the negative effects from this irrational pre-market review manner have been occurring in the clinical sites such as in healthcare facilities. The reason why such a pre-market approval review manner has been established, the situation of the negative effects on the clinical sites, and the pre-market approval review manner in the advanced foreign countries like EU and US is explained.View full abstractDownload PDF (663K)
Original Papers
-
Preliminary Study of Chest RadiographsYongbum LEE, Du-Yih TSAI2010 Volume 27 Issue 2 Pages 29-32
Published: 2010
Released on J-STAGE: June 04, 2010
JOURNAL FREE ACCESSIn this paper, a novel application of computer-aided diagnosis (CAD) system, namely portable CAD, was proposed. As a preliminary study, we investigated differences of feature values of nodules calculated by a CAD algorithm, between original chest radiograph and camera image taken by a digital camera. Sixty cases of chest radiographs were used in the study. These radiographs were initially displayed on the monitor, and then taken by the digital camera. Then, the CAD scheme was applied to the obtained camera images. In the CAD scheme, detection of nodule candidates was performed by using matched and ring filters. Two features, area and circularity, were calculated from nodule candidate regions in radiographs and camera images, and were compared respectively. In conclusion, a close correlation between the features calculated from radiographs and camera images was verified.View full abstractDownload PDF (773K) -
Rie TANAKA, Katsuhiro ICHIKAWA, Shinichiro MORI, Suguru DOBASHI, Motok ...2010 Volume 27 Issue 2 Pages 33-37
Published: 2010
Released on J-STAGE: June 04, 2010
JOURNAL FREE ACCESSThe purpose of this study was to address image lag in target tracking and its influence on the accuracy of target tracking. Fluoroscopic images were obtained using a direct type of dynamic flat-panel detector (FPD) . Image lag properties, modulation transfer function (MTF) , and profile curves were measured. Digital phantoms of metal sphere with and without blurred edge due to image lag were simulated using the results, respectively, and then superimposed on breathing chest radiographs of a patient. The moving target with and without image lag was traced using a template-matching technique. In the results, the image lag for the first frame after X-ray cutoff was 2.0% and decreased to less than 0.1% in the fifth frame. In the measurement of profile curves on the edges of tungsten material plates, the effect of image lag was seen as blurred edges of the plate. The blurred edges of the plate were also indicated as reduction of MTF. However, the target could be traced without tracking error. The results indicated that there was no effect of image lag on target tracking in usual breathing speed in a radiotherapy situation.View full abstractDownload PDF (999K) -
Sachiko IHARA, Toshihiro OGURA, Fumiyo TSUKADA, Masanori FUJII, Tomohi ...2010 Volume 27 Issue 2 Pages 38-41
Published: 2010
Released on J-STAGE: June 04, 2010
JOURNAL FREE ACCESSIn our previous study, fat tissues on abdominal CT tended to be concentrated around colon cancer sites, and the intra-abdominal fat area in patients with colon cancer presented a small secondary peak in the pelvis, which we called the sub-peak. We assessed the amount of the sub-peak to develop a novel method for early detection of colon cancer. The profile of intra-abdominal fat data was determined first by segmentation of fat components in CT images, and was approximated by removing the sub-peak part manually by use of six-degree polynominal approximation. The sub-peak value was obtained by subtracting the approximate data from the original data. The amount of the sub-peak was quantified by the sub-peak ratio which is defined by the ratio of the maximum value to the sub-peak value in the profile of intra-abdominal fat data. The subjects consisted of patients with rectal cancer (60 cases) , sigmoid colon cancer (72 cases) , and non-tumors in the pelvic cavity (59 cases) . Our result indicated that the accuracy in detecting colon cancer was 76.1% when the sub-peak ratio was equal to or greater than 10%. This amount of the sub-peak ratio may be useful in the development of a computer-aided diagnosis (CAD) scheme for early detection of colon cancer.View full abstractDownload PDF (2612K)
Report of Research Project
-
Hiroshi FUJITA, Yoshikazu UCHIYAMA, Yuji HATANAKA, Daisuke FUKUOKA2010 Volume 27 Issue 2 Pages 42-49
Published: 2010
Released on J-STAGE: June 04, 2010
JOURNAL FREE ACCESSThe need for utilizing image diagnosis has become important because of the recent increase in the number of screening cases in the aging population and the number of images that need to be analyzed in a sophisticated diagnostic imaging environment. We therefore engaged in the developments of computer-aided diagnosis (CAD) systems for assisting the doctors' image interpretation in five-year (2004.4-2009.3) robotics advanced medical cluster research & development project in Knowledge cluster Gifu & Ogaki region, Japan. In particular, we have developed three CAD systems for brain MR images, fundus photography, and breast ultrasonography. Some of there CAD systems have already been commercialized and have been reported to afford good results. Herein, we report the latest research results obtained in this succeesful project.View full abstractDownload PDF (6773K)
- |<
- <
- 1
- >
- >|