Nakai, Mutsuo - Author List - OKAYAMA UNIVERSITY SCIENTIFIC ACHIEVEMENT REPOSITORY

Grant Number (desc)

JaLCDOI	10.18926/15162
Title Alternative	Clinical opplication of a newly developed radiographic system including a fluoroscope equiped with CCD and digital image processor
FullText URL	065_107_114.pdf
Author	Akiyama, Tsuneo\| Nakai, Mutsuo\| Kajimoto, Kazuhiro\| Mitsunobu, Fumihiro\| Mifune, Takashi\| Tanizaki, Yoshiro\| Ochi, Koji\| Riaz, Chowdhury\| Satou, Masataka\| Ukon, Hiroe\|
Abstract	画像の入力部に世界初100万画素の多画素･高精細のCCD(電荷結合素子)を用いたテレビカメラを搭載したX線テレビ装置とDigital・Radiography装置を導入し,主に消化管検査を中心に多目的に任用した｡このシステムは従来のscreen/filmシステムの持つ膨大な情報量を確保しながらCCDカメラのメリットを最大限に生かしており,DRシステムの特長であるリアルタイムのCRT撮影画像表示,透視像のFREEZE確認,動態解析,画像処理等を導入することにより診断能の向上がはかれた｡更に,従来X線フィルム･撮像管に比較して被曝量の大幅な低減が期待できた｡また,デジタルであるため撮影像をHDに保管すると共にMODにも記録･再生が可能である｡今後,PACSやフイルムレス電子媒体保管への展開の可能性についても確認できた｡
Abstract Alternative	We have clinically applied a newly developed radiographic system which was introduced into our institute in April 1994. This system consists of a fluoroscope, CCD (charge-coupled device) which had a million matrix, and digital image processor. This system has following advantages comparison with a conventional radiographic system ; (1) doses of x-ray exposuce during examination is less, (2) a sharp fluoroscopic image can be obtained by real-time image processing, (3) radiographic images can be kept in the recording device such as hard disc (HD) and magnetic optical disc (MOD) since this has a digital radiographic system. By connecting this system with main online system, it is expected to be able to see the various diagnostic images simulataneously as well as laboratory data at different spots of the hospital which is now available in other hospltal.
Keywords	増感紙/フイルム (Screen/Film) 光電子増倍管 (Image･Intensifier (l･I)) デジタル･イメージング (Digital･Imaging) 電荷結合素子 (CCD) 光磁気ディスク (MOD) デジタルラジオグラフィ (Digital Radiography)
Publication Title	岡大三朝分院研究報告
Published Date	1994-09
Volume	volume65
Start Page	107
End Page	114
ISSN	0918-7839
language	日本語
File Version	publisher
NAID	120002307511

椎体変形と腰椎海綿骨骨塩量の関連-360症例の検討

JaLCDOI	10.18926/15163
Title Alternative	Relationship between vertebral transformation (or fracture) and bone mineral density in lumbar vertebrae.
FullText URL	065_115_118.pdf
Author	Nakai, Mutsuo\| Akiyama, Tsuneo\| Kajimoto, Kazuhiro\| Mitsunobu, Fumihiro\| Mifune, Takashi\| Tanizaki, Yoshiro\|
Abstract	QCTによる腰椎海綿骨骨塩量と,圧迫骨折を含む,椎体(第11胸椎～第4腰椎)の変形率の関係を検討した｡椎体変形率と腰椎QCT値の間の強い相関関係が確認され,椎体変形者全体の50%はQCT値70mg/cm(3)以下に分布し,90%は125mg/cm(3)以下に分布した｡さらに,この70mg/cm(3)付近での椎体変形者の割合は50%であり,125mg/cm(3)付近での椎体変形の割合は10%であった｡QCTによる腰椎海綿骨骨塩量測定値は,腰椎の変形および骨折の危険性を予測する良好な指標であることが確認できた｡
Abstract Alternative	In 360 females, Bone mineral density (BMD) in lumbar vertebrae (L2-L4) was assessed by quantitative computed tomography (QCT), and the values obtained were compared with the frequency of vertebral transformation or fracture as assessed by lateral scan image (scanogram) by X-ray CT. A correlation was observed between the frequency of vertebral transformation (or fracture) and lumbar BMD values : BMD under 125mg/cm(3) was observed over 90% of women with vertebral transformation, and BMD under 70mg/cm(3) was found about 50% of them. These results suggest that decrease in BMD in lumbar vertebrae leads to vertebral transformation or fracture. Thus, measurement of BMD by QCT would be very useful in predicting vertebral transformation or fractures.
Keywords	骨粗鬆症 (osteoporosis) 骨塩量 (bone mineral density) QCT (quantitative computed tomography) 腰椎 (lumbar vertebrae)
Publication Title	岡大三朝分院研究報告
Published Date	1994-09
Volume	volume65
Start Page	115
End Page	118
ISSN	0918-7839
language	日本語
File Version	publisher
NAID	120002307136