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    ASTM E1695-20 REDLINE

    Standard Test Method for Measurement of Computed Tomography (CT) System Performance
    • 발행일 : 2020-06-01
    • 발행기관 : ASTM
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1.1 This test method provides instruction for determining the spatial resolution and contrast sensitivity in X-ray and γ-ray computed tomography (CT) volumes. The determination is based on examination of the CT volume of a uniform cylinder of material. The spatial resolution measurement (Modulation Transfer Function) is derived from an image analysis of the sharpness at the edges of the reconstructed cylinder slices. The contrast sensitivity measurement (Contrast Discrimination Function) is derived from an image analysis of the contrast and the statistical noise at the center of the cylinder slices.

1.2 This test method is more quantitative and less susceptible to interpretation than alternative approaches because the required cylinder is easy to fabricate and the analysis easy to perform.

1.3 This test method is not to predict the detectability of specific object features or flaws in a specific application. This is subject of IQI and RQI standards and standard practices.

1.4 This method tests and describes overall CT system performance. Performance tests of systems components such as X-ray tubes, gamma sources, and detectors are covered by separate documents, namely Guide E1000, Practice E2737, and Practice E2002; c.f. 2.1, which should be consulted for further system analysis.

1.5 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
국제분류(ICS)코드
페이지수 13
Edition 20

이력정보

No. 표준번호 표준명 발행일 상태
1 ASTM E1695-20 REDLINE상세보기 Standard Test Method for Measurement of Computed Tomography (CT) System Performance 2020-06-01 표준
2 ASTM E1695-20상세보기 Standard Test Method for Measurement of Computed Tomography (CT) System Performance 2020-06-01 표준
3 ASTM E1695-95(2013)상세보기 Standard Test Method for Measurement of Computed Tomography (CT) System Performance 2013-06-01 표준
4 ASTM E1695-95(2006)e1상세보기 Standard Test Method for Measurement of Computed Tomography (CT) System Performance 2006-12-01 구판
5 ASTM E1695-95상세보기 Standard Test Method for Measurement of Computed Tomography (CT) System Performance 2001-01-01 구판
6 ASTM E1695-95(2001)상세보기 Standard Test Method for Measurement of Computed Tomography (CT) System Performance 2001-01-01 구판

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