ASTM E2002-98(2003)e1

Standard Practice for Determining Total Image Unsharpness in Radiology

SIGNIFICANCE AND USE
The gage is intended to provide a means for measuring total image unsharpness as independently as practicable from the imaging system contrast sensitivity limitations. Further description and details of the gage are provided in EN-462-5.
The gage can be used in conjunction with a contrast sensitivity measuring gage, as described in Practice E 1647.
SCOPE
1.1 This practice covers the design and basic use of a gage used to determine the total image unsharpness of radiographs and radioscopic systems.
1.2 This practice is applicable to radiographic and radioscopic imaging systems utilizing X-ray and gamma ray radiation sources.
1.3 The values stated in SI units are to be regarded as standard.
1.4 The gage described can be used effectively with radiation energies up to 400 kv. When using energies in the megavolt range the results may not be completely satisfactory.
1.5 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.

General Information

• Status: Historical
• Publication Date: 09-Jun-2003
• Technical Committee: E07 - Nondestructive Testing
• Drafting Committee: E07.01 - Radiology (X and Gamma) Method

Relations

• Replaces: ASTM E2002-98 - Standard Practice for Determining Total Image Unsharpness in Radiology
• Effective Date: 10-Jun-2003
• Replaced By: ASTM E2002-98(2009) - Standard Practice for Determining Total Image Unsharpness in Radiology
• Effective Date: 01-Jun-2009
• Referred By: ASTM E2597/E2597M-22 - Standard Practice for Manufacturing Characterization of Digital Detector Arrays
• Effective Date: 10-Jun-2003
• Referred By: ASTM E746-18 - Standard Practice for Determining Relative Image Quality Response of Industrial Radiographic Imaging Systems
• Effective Date: 10-Jun-2003
• Referred By: ASTM E1695-20e1 - Standard Test Method for Measurement of Computed Tomography (CT) System Performance
• Effective Date: 10-Jun-2003
• Referred By: ASTM E1165-20 - Standard Test Method for Measurement of Focal Spots of Industrial X-Ray Tubes by Pinhole Imaging
• Effective Date: 10-Jun-2003
• Referred By: ASTM E3375-23 - Standard Practice for Cone Beam Computed Tomographic (CT) Examination
• Effective Date: 10-Jun-2003
• Referred By: ASTM E2007-10(2023) - Standard Guide for Computed Radiography
• Effective Date: 10-Jun-2003
• Referred By: ASTM E2445/E2445M-20 - Standard Practice for Performance Evaluation and Long-Term Stability of Computed Radiography Systems
• Effective Date: 10-Jun-2003
• Referred By: ASTM E1161-21 - Standard Practice for Radiographic Examination of Semiconductors and Electronic Components
• Effective Date: 10-Jun-2003
• Referred By: ASTM E2446-23 - Standard Practice for Manufacturing Characterization of Computed Radiography Systems
• Effective Date: 10-Jun-2003
• Referred By: ASTM E1411-16 - Standard Practice for Qualification of Radioscopic Systems
• Effective Date: 10-Jun-2003
• Referred By: ASTM E2736-17(2022) - Standard Guide for Digital Detector Array Radiography
• Effective Date: 10-Jun-2003
• Referred By: ASTM E2033-17 - Standard Practice for Radiographic Examination Using Computed Radiography (Photostimulable Luminescence Method)
• Effective Date: 10-Jun-2003
• Referred By: ASTM E1647-16(2022) - Standard Practice for Determining Contrast Sensitivity in Radiology
• Effective Date: 10-Jun-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
e1
Designation:E2002–98 (Reapproved 2003)
Standard Practice for
Determining Total Image Unsharpness in Radiology
This standard is issued under the fixed designation E 2002; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Editorial corrections were made throughout in June 2003.
1. Scope 3. Terminology
1.1 This practice covers the design and basic use of a gage 3.1 Definitions—Definitions of terms applicable to this
used to determine the total image unsharpness of radiographs practice may be found in Terminology E 1316.
and radioscopic systems.
4. Summary of Practice
1.2 This practice is applicable to radiographic and radio-
scopic imaging systems utilizing X-ray and gamma ray radia- 4.1 When it is determined necessary to evaluate and mea-
sure the Total Image Unsharpness (Spatial Resolution) of an
tion sources.
1.3 The values stated in SI units are to be regarded as imaging system separately and apart from contrast sensitivity
measurements, a tool or gage as described in this practice can
standard.
1.4 The gage described can be used effectively with radia- be used. Conventional IQIs described in Practices E 747 and
E 1025 combine the contrast sensitivity and resolution mea-
tion energies up to 400 kv. When using energies in the
megavolt range the results may not be completely satisfactory. surements into an overall figure of merit. Such figures of merit
may not be adequate to detect subtle changes in the imaging
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the system’s performance. For example, in a high-contrast image,
spatial resolution can degrade with almost no noticeable effect
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- upon the overall image quality. Similarly, in an application in
which the imaging system provides a very sharp image,
bility of regulatory limitations prior to use.
contrast can fade with little noticeable effect upon the overall
2. Referenced Documents
image quality, as determined using conventional IQIs. These
2.1 ASTM Standards: situations often develop and may go undetected until the
E 747 Practice for Design, Manufacture and Material system performance deteriorates below acceptable image qual-
Grouping Classification of Wire Image Quality Indicators ity limits.
(IQI) Used for Radiology
5. Significance and Use
E 1025 Practice for Design, Manufacture and Material
5.1 The gage is intended to provide a means for measuring
Grouping Classification of Hole-Type Image Quality Indi-
cators (IQI) used for Radiology total image unsharpness as independently as practicable from
the imaging system contrast sensitivity limitations. Further
E 1316 Terminology for Nondestructive Examinations
E 1647 Practice for Determining Contrast Sensitivity in description and details of the gage are provided in EN-462-5.
5.2 The gage can be used in conjunction with a contrast
Radioscopy
2.2 EN Standard: sensitivity measuring gage, as described in Practice E 1647.
EN-462-5:1994 Nondestructive Testing—Image Quality of
6. Gage Construction
Radiographs—Part 5: Image Quality Indicators (Duplex
6.1 The gage shall be fabricated in accordance with Fig. 1,
Wire Type)—Determination of Total Image Unsharpness
using the tolerances given in Table 1. This gage is identical to
Value
This practice is under the jurisdiction of ASTM Committee E07 on Nonde-
structive Testing and is the direct responsibility of Subcommittee E07.01 on
Radiology (X and Gamma) Method.
Current edition approved June 10, 2003. Published August 2003. Originally
approved in 1998. Last previous edition approved in 1998 as E 2002 - 98.
Annual Book of ASTM Standards, Vol 03.03.
Available from British Standards Institution, British Standards House, 389
Chiswick High Road, London, W4 4AL United Kingdom.
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