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Volume 32 (2015)
- Issue 4 Pages 71-
- Issue 3 Pages 48-
- Issue 2 Pages 19-
- Issue 1 Pages 1-
Volume 32, Issue 2
Displaying 1-5 of 5 articles from this issue
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Invited Lecture
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Masahiro YAMAGUCHI2015 Volume 32 Issue 2 Pages 19-24
Published: June 29, 2015
Released on J-STAGE: June 28, 2015
JOURNAL FREE ACCESSDigital imaging is now being introduced in pathology, owing to the recent advancement of whole slide imaging, or digital slide technology. In this paper, after the review of the significance of digital imaging in pathology, a fully-automatic image analysis system developed aiming at quantitative pathology is introduced. Then an important problem in pathology image analysis, the color management is addressed, including the international activity on that issue. The application of multispectral technology to pathology is also presented. The digital image analysis technology will change the pathology diagnosis from qualitative or semi-quantitative to quantitative, and it is expected to bring considerable impact to the cancer diagnosis and treatment.View full abstractDownload PDF (1822K)
Educational Lecture
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Hiroshi NAGAHASHI2015 Volume 32 Issue 2 Pages 25-31
Published: June 29, 2015
Released on J-STAGE: June 28, 2015
JOURNAL FREE ACCESSThis paper addresses some feature description and satio‐temporal analysis methods for bio‐medical images. Recently various kinds of diagnostic imaging systems have been developed. However, it is still important to improve the efficiency and performance of image processing techniques in biological and medical fields. Especially, texture and motion analyses of spatio‐temporal images like 3 dimensional time lapse data of ultra‐sound images, CT images and cell division images will give a new aspect for computer‐aided diagnosis. Because we will be able to obtain some information about 3D micro‐structure of cells or organs. In this paper, two optical flow methods for motion analysis and two texture feature descriptors are reviewed, and some examples of these processings are given.View full abstractDownload PDF (5352K)
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Atsuhiro DOI2015 Volume 32 Issue 2 Pages 32-37
Published: June 29, 2015
Released on J-STAGE: June 28, 2015
JOURNAL FREE ACCESSUnder the former Pharmaceutical Affairs Law（PAL）, embedded software which is intended to operate the medical device is regulated as unbroken part of the Hardware. PAL was revised and enacted on November 20 and promulgated on 27, 2013, and stand‐alone software programs are defined as a medical device.
On the other hand, “the Medical Software Study Group" was set up by the Ministry of Economy, Trade and Industry（METI）, and relevant Japanese industry associations, 3J（JAHIS/JEITA/JIRA）, joined it. As a result of argument in the Study Group, they pointed out the risk caused by the so‐called health software that is outside of the scope of the regulation, and 3J established Good Health Software Promotion Council（GHS）to plan and apply an industry voluntary standard and rule for health software that is outside of the scope of the regulation.View full abstractDownload PDF (2609K)
Original Article
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Manabu WATANABE, Eiichi SATO, Yasuyuki ODA, Michiaki SAGAE, Yuich SATO ...2015 Volume 32 Issue 2 Pages 38-43
Published: June 29, 2015
Released on J-STAGE: June 28, 2015
JOURNAL FREE ACCESSQuasi‐monochromatic photon counting was performed using a silicon PIN detector and an energy‐selecting device, consisting of two comparators and a microcomputer. The two threshold energies are determined using low and high‐energy comparators, respectively. The microcomputer produces a single logical pulse when only a logical pulse from a low‐energy comparator is input to the microcomputer. Next, the microcomputer never produces the pulse when two pulses from low and high‐energy comparators are input to the microcomputer, simultaneously. The logical pulses from the microcomputer are input to a frequency‐voltage converter（FVC）to convert count rates into voltages; the rate is proportional to the voltage. The output voltage from the FVC is sent to a personal computer through an analog‐digital converter to reconstruct tomograms. The X‐ray projection curves for tomography are obtained by repeated linear scans and rotations of the object at a tube voltage of 70kV and a current of 0.20mA. Iodine（I）K‐edge CT was performed using contrast media and X‐ray photons with a count rate of 1.4 kilocounts per second and energies ranging from 34 to 55keV, since these photons with energies beyond I‐K‐edge energy 33.2keV are absorbed effectively by I atoms.View full abstractDownload PDF (2542K)
Work in Progress
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- Development of the experimental system using a digital single‐lens reflex camera -Shinya OSAWA, Chika MURATA, Fumio HASHIMOTO, Atsushi TERAMOTO, Hiroshi ...2015 Volume 32 Issue 2 Pages 44-47
Published: June 29, 2015
Released on J-STAGE: June 28, 2015
JOURNAL FREE ACCESSAn optical computed tomography（optical CT）is an imaging device that acquires a tomographic image by using visible light or near infrared light. In our previous study, optical CT using visible light was developed. However, the developed system was applicable to a transparent or small object. In this study, we focused on near-infrared light, and we conducted development and basic evaluation of an experimental system of optical CT using a near-infrared light. As for the experimental system, we developed the simple structure system employed near-infrared light source, single-lens reflex camera, and rotational table. In the experiments, we investigated the imaging properties of developed system using three types of samples. Results indicate that our system may be useful to obtain the tomographic image of biological samples.View full abstractDownload PDF (2303K)
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