巻号一覧
67 巻, 2 号
選択された号の論文の6件中1～6を表示しています
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巻頭言
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江島 光弘2011 年 67 巻 2 号 p. 67_2_I
発行日: 2011/02/25
公開日: 2011/03/29
ジャーナル 認証ありPDF形式でダウンロード (299K)
ノート
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高橋 寛治, 加藤 京一, 石田 秀樹, 崔 昌五, 中澤 靖夫2011 年 67 巻 2 号 p. 137-144
発行日: 2011/02/25
公開日: 2011/03/29
ジャーナル フリーA study of a method of taking X-rays of the shoulder joint axis when the upper arm is fixed and cannot be rotated. When the shoulder joint has suffered damage, rotating the arm can be very painful, and obtaining accurate images of the axis is frequently difficult. For this reason, at this hospital, the Stockinette-Velpeau procedure is used on patients who cannot rotate their arms to have X-rays taken. In this procedure, the patient bends backwards at a 40-degree angle, and an X-ray of the shoulder joint axis is taken from directly below the joint. Using this method, even if the upper arm is hanging down, information regarding the direction of the axis can be obtained. However, maintaining this body position is difficult and requires assistance. The patient may also experience pain. For this reason, a new method was sought of X-raying the axis from a body position that is easier on the patient and by which diagnostic information on the axis direction can be obtained from patients who cannot rotate their upper arms. The result of seeking a new method was an X-ray that can be taken diagonally at a 25-degree angle relative to the shoulder joint socket. This X-ray method requires no rotation of the axis and provides the closest view of the axis. This new method suggests a way to X-ray the axis that is easy on patients even when the shoulder joint is damaged.抄録全体を表示PDF形式でダウンロード (717K)
臨床技術
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圓尾 浩康, 上口 貴志, 田中 千香子, 山崎 慶太, 角辻 暁2011 年 67 巻 2 号 p. 145-151
発行日: 2011/02/25
公開日: 2011/03/29
ジャーナル フリーThe recently introduced 320-detector row computed tomography (320-row CT) allows very fast volumetric acquisition of the entire heart. Because the total amount of contrast agent required for CT coronary angiography (CTCA) depends directly on the acquisition time, 320-row CTCA would substantially reduce the contrast agent dose. The objective of this retrospective study was to evaluate the feasibility of contrast volume reduction on 320-row CTCA compared with 64-detector row CTCA (64-row CTCA). We retrospectively reviewed consecutive 320- and 64-row CTCA data (16 eligible cases for each; administrated contrast volume, 20–24 ml for the former and 50–65 ml for latter) from a homogeneous patient population (age ≤ 81, body weight ≤ 67 kg, and heart rate ≤ 69 bpm). The two types of CTCA data were compared with respect to the successful rate of adequate intravascular contrast enhancement defined as the number of segments with attenuations of more than 250 HU divided by total number of coronary segments evaluated. Our dataset provided mean intravascular attenuation values of 320 and 404 HU on the 320- and 64-row CTCA, respectively. Although the attenuation values were statistically lower for the 320-row CTCA (P < 0.001), there was no significant difference in the successful rates of adequate intravascular contrast enhancement (rate of 0.98 for each; P > 0.05). We therefore conclude that 320-row CTCA is a feasible method of diagnostic imaging and is superior to 64-row CTCA because it uses less of the contrast medium.抄録全体を表示PDF形式でダウンロード (454K) -
宇戸 朋之, 石山 成浩, 木村 紘也, 葛城 由士, 増成 豊和, 澁谷 孝行, 石木 浩一, 中西 健, 穴井 達弥, 隅田 茂, 森松 ...2011 年 67 巻 2 号 p. 152-161
発行日: 2011/02/25
公開日: 2011/03/29
ジャーナル フリーWhile radiography provides us clinically valuable information, it increases the risk of radiation exposure. Previous studies have reported great variations in radiation doses among institutions. It is concerning that radiation doses will increase and vary greatly from institution to institution when digital radiographic modalities become more common. In the present study, we measured chest and abdominal radiation doses at 10 institutions that had X-ray digital imaging systems. Differences in radiation doses among the institutions were evaluated and compared with the previous reports. The image quality at the measured radiation doses were also evaluated. The doses were measured by the same dosimeter, and the image quality at a specific dose was evaluated using the standard deviation of the digital values and Wiener spectrum. Our results indicate that the difference in radiation among institutions was approximately five-fold at a maximum and smaller than the previous reports had indicated. The image quality was improved as the dose was increased. We considered the five-fold difference to be the result of variations in optimum image quality and associated radiation doses among institutions. In summary, evaluating the radiation dose along with the image quality is important to optimize the doses.抄録全体を表示PDF形式でダウンロード (605K)
特別企画 名誉会員インタビュー
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杜下 淳次2011 年 67 巻 2 号 p. 163-167
発行日: 2011/02/25
公開日: 2011/03/29
ジャーナル 認証ありPDF形式でダウンロード (494K)
JIRAトピックス
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本間 龍夫, 佐々木 良文, 山口 昌利2011 年 67 巻 2 号 p. 168-169
発行日: 2011/02/25
公開日: 2011/03/29
ジャーナル 認証ありPDF形式でダウンロード (350K)
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