ASTM-E1570:2005 Edition

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E1570-00(2005)e1 Standard Practice for Computed Tomographic (CT) Examination

Published By	Publication Date	Number of Pages
ASTM	2005	12

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Categories: 35.240.80 - IT applications in health care technology, ASTM

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Description

ASTM E1570-00-e1-Reapproved2005

Historical Standard: Standard Practice for Computed Tomographic (CT) Examination

ASTM E1570

Scope

1.1 This practice is for computed tomography (CT), which may be used to nondestructively disclose physical features or anomalies within a test object by providing radiological density and geometric measurements. This practice implicitly assumes the use of penetrating radiation, specifically X-ray and -ray.

1.2 CT systems utilize a set of transmission measurements made along paths through the test object from many different directions. Each of the transmission measurements is digitized and stored in a computer, where they are subsequently reconstructed by one of a variety of techniques. A treatment of CT principles is given in Guide E 1441.

1.3 CT is broadly applicable to any material or test object through which a beam of penetrating radiation passes. The principal advantage of CT is that it provides densitometric (that is, radiological density and geometry) images of thin cross sections through an object without the structural superposition in projection radiography.

1.4 This practice describes procedures for performing CT examinations. This practice is to address the general use of CT technology and thereby facilitate its use.

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 and health practices and determine the applicability of regulatory limitations prior to use. For specific safety statements, see Section , NBS Handbook 114, and Federal Standards 21 CFR 1020.40 and 29 CFR 1910.96.

Keywords

artifact; beam-hardening; computed tomography; contrast; contrast detail dose curves; contrast sensitivity; data storage; densitometric images; detection system; edge response function; field-of-view; gamma-ray; image analysis; image display; image reconstruction; line pairs/millimetre; line spread function; linear attenuation; manipulation system; modular transfer function; noise; pixel ; reconstruction diameter; reconstruction matrix; signal-to-noise; slice plane thickness; spatial resolution; system configuration; test object; test phantom; voxel; X-ray

ICS Code

ICS Number Code 35.240.80 (IT applications in health care technology)

DOI: 10.1520/E1570-00R05E01

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Practice
2	Significance and Use Basis of Application System Configuration
4	Documentation CT System Setup and Optimization
7	Performance Measurement TABLE 1
8	FIG. 1
10	FIG. 2
11	CT Examination Interpretation and Acceptance Criteria Records, Reports, and Identification of Accepted Material Safety Conditions Precision and Bias Keywords

Additional information

Standard Title	E1570-00(2005)e1 Standard Practice for Computed Tomographic (CT) Examination
Published Code	ASTM
Publication Date	2005
Pages Count	12
ICS Codes	35.240.80 - IT applications in health care technology