巻号一覧
11 巻 (1994)
- 3 号 p. 87-
- 2 号 p. 35-
- 1 号 p. 1-
11 巻, 1 号
選択された号の論文の4件中1～4を表示しています
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滝沢 正臣1994 年 11 巻 1 号 p. 1-6
発行日: 1994年
公開日: 2012/08/27
ジャーナル フリーThe Shinshu University Hospital and its affiliated hospitals in the Nagano prefecture are located at a mountain area in the center of Japan, where the traffic and consequently medical cooperation among them are hindered particularly in the winter season. Then we are integrating the multi-modality network combined with an university microwave network (SUNS) and the ISDN (Integrated Services Digital Network) to help the cooperation between radiology department of the Shinshu University Hospital and its affiliated hospitals. We have three types of radiological image communication systems in from our radiolgy department to affiliated hospitals.1. Teleconference using the SUNS audio visual system.2. Teleprocessing radiographic images using the SUNS 1.5Mbps digital line or phone lines.3. Teleradiology and conference using an university microwave network and a pair of mini wireless trancievers.4. Image transmission by 64kbit ISDN.5. An evaluation imgae quality for Medical Fax System studies by the ROC analysis.抄録全体を表示PDF形式でダウンロード (2730K) -
桐戸 徹, 藤田 広志, 遠藤 登喜子, 堀田 勝平, 木戸 長一郎, 石垣 武男1994 年 11 巻 1 号 p. 7-12
発行日: 1994年
公開日: 2012/08/27
ジャーナル フリーThe purpose of this study is to develop an automated-detection algorithm for clustered microcalcifications on digital mammograms. The proposed system consists of the combinations of relatively simple algorithms for faster processing. The processings, such as overall background-trend correction in breast region, enhancement of high-frequency components, and contraction-expansion processing, are included. In a study of 32 clinical mammograms including 17 normal and 15 abnormal cases, our scheme achieves a 14/15(93.3%) true positive film classification (i. e. those containing clusters) with false positive clusters detected in 2/17 (11.8%) films. These results indicate that the automated method has the potential to aid physicians in screening mammograms for clustered microcalcifications.抄録全体を表示PDF形式でダウンロード (962K) -
経験式およびエネルギー分布を考慮した方法で計算した結果とFewellらの実験結果との比較山野 要, 中森 伸行, 山田 正良, 金森 仁志1994 年 11 巻 1 号 p. 13-21
発行日: 1994年
公開日: 2012/08/27
ジャーナル フリーIn the semiempirical m odels f or calculation o f bremsstrahlung sp ectra, e lectron e nergy d istribution in a target was disregarded. Wecomputed e lectron e nergy distribution using Monte C arlo m ethod and calculated bremsstrahlung spectra. We compared the results calculated by Birch-Marshal al nd Tucker et al. -models with the spectra m easured by Fewell e t al. Spectra calculated by Birch-Marshal ml odel deviated from the experimental data as target angle decreased. The results calculated using Tucker et al. model agreed with the experimental data for an x-ray tube with the target angle of 10°, but are in disagreement for other x-ray tube. Our results can explain a dependence of the spectra on target angle and are in g ood a greement w ith the experimenta dl ata for a variety of radiographic c onditions in medical use. Fmally, we showed that taking electron e nergy d istribution in a target i nto c onsideration w as very important for the calculation of accurate b remsstrahlung spectra.抄録全体を表示PDF形式でダウンロード (1115K) -
東田 善治, 肥合 康弘, 高田 卓雄, 高橋 睦正, 朝原 正喜, 稲津 博, 岡田 弘治, 菊池 務, 小寺 吉衞, 中村 光夫, 畑川 ...1994 年 11 巻 1 号 p. 22-29
発行日: 1994年
公開日: 2012/08/27
ジャーナル フリーPDF形式でダウンロード (1161K)
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