1.CT性能評価委員会勧告の注意事項について(II.CT装置の性能管理について)

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概要

• 論文の詳細を見る

• At present, several types of CT scanners are used in radiologic diagnostic field. Even if the tube voltage of X-ray is about 120 kV, X-ray energy distribution in every CT scanner may be different because of various X-ray filters used, geometrical conditions of data collection and etc. Therefore these performance is not shown as the same. In order to accurately diagnose lesions from normal images by the use of CT scanners, Japanese Committee for Evaluating Performance of CT Scanners recommended the standardization of how to measure CT scanner's performance and how to use several phantoms for these tests ; noise, contrast scale, spatial resolution (high and low), absorbed dose, size dependency of CT number. These two years and half, many advices and discussions as to performance gave us some points to be corrected and improved. These points containing tests and some results of low contrast resolution were reported. The phantoms of xyron-bar-in-xyron have no X-ray energy dependency of CT value.

• 公益社団法人日本放射線技術学会の論文
• 1982-09-01

著者

• 竹中 榮一

  Ct性能評価委員会東大医学部放射線医学教室

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