ASTM E746-18
Standard Practice for Determining Relative Image Quality Response of Industrial Radiographic Imaging Systems

Standard No.

ASTM E746-18

Release Date

2018

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM E746-23

Latest

ASTM E746-23

Scope

1.1 This standard provides a practice whereby industrial radiographic imaging systems may be comparatively assessed using the concept of relative image quality response (RIQR). The RIQR method presented within this practice is based upon the use of equivalent penetrameter sensitivity (EPS) described within Practice E1025 and subsection 5.3 of this practice. Figure 1 illustrates a relative image quality indicator (RIQI) that has four different plaque thicknesses (0.015, 0.010, 0.008, and 0.005 in.) sequentially positioned (from top to bottom) on an absorber plate of a specified material and thickness. The four plaques contain a total of 14 different arrays of penetrameter-type hole sizes designed to render varied conditions of threshold visibility when exposed to the appropriate radiation. Each “EPS” array consists of 30 identical holes; thus, providing the user with a quantity of threshold sensitivity levels suitable for relative image qualitative response comparisons. There are two standard materials (steel and plastic) specified herein for the RIQI and absorber. For special applications the user may design a non-standard RIQI-absorber configuration; however the RIQI configuration shall be controlled by a drawing similar to Fig. 1. Use of a non-standard RIQI-absorber configuration shall be described in the user’s written technique and approved by the CEO. 1.2 This practice is not intended to qualify the performance of a specific radiographic technique nor for assurance that a radiographic technique will detect specific discontinuities in a specimen undergoing radiographic examination. 1.3 This practice is not intended to be used to classify or derive performance classification categories for radiographic imaging systems. For example, performance classifications of radiographic film systems may be found within Test Method E1815, and manufacturer characterization of computed radiography (CR) systems may be found in Practice E2446. However, the RIQI and absorber described in this practice are used by Practice E2446 for manufacturer characterization of computed radiography (CR) systems and by Practice E2445 to evaluate performance and to monitor long term stability of CR systems. 1.4 For high-energy X-ray applications (4 to 25 MeV), Test Method E1735 provides a similar RIQR standard practice. 1.5 The values stated in SI are to be regarded as the 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.

ASTM E746-18 Referenced Document

• ASTM B152/B152M Standard Specification for Copper Sheet, Strip, Plate, and Rolled Bar*， 2019-10-01 Update
• ASTM E1025 Standard Practice for Design, Manufacture, and Material Grouping Classification of Hole-Type Image Quality Indicators (IQI) Used for Radiology
• ASTM E1079 Standard Practice for Calibration of Transmission Densitometers*， 2021-11-01 Update
• ASTM E1316 Standard Terminology for Nondestructive Examinations*， 2024-02-01 Update
• ASTM E1735 Standard Test Method for Determining Relative Image Quality of Industrial Radiographic Film Exposed to X-Radiation from 4 to 25 MV
• ASTM E1815 Standard Test Method for Classification of Film Systems for Industrial Radiography
• ASTM E2002 Standard Practice for Determining Total Image Unsharpness in Radiology
• ASTM E2445 Standard Practice for Qualification and Long-Term Stability of Computed Radiology Systems*， 2024-04-22 Update
• ASTM E2446 Standard Practice for Manufacturing Characterization of Computed Radiography Systems*， 2023-08-01 Update
• ASTM E999 Standard Guide for Controlling the Quality of Industrial Radiographic Film Processing
• ISO 5-2 Photography and graphic technology - Density measurements - Part 2: Geometric conditions for transmittance density
• ISO 7004 Photography - Industrial radiographic films - Determination of ISO speed, ISO average gradient and ISO gradients G2 and 64 when exposed to X- and gamma-radiation

ASTM E746-18 history

• 2023 ASTM E746-23 Standard Practice for Determining Relative Image Quality Response of Industrial Radiographic Imaging Systems below 4 MeV
• 2018 ASTM E746-18 Standard Practice for Determining Relative Image Quality Response of Industrial Radiographic Imaging Systems
• 2017 ASTM E746-17 Standard Practice for Determining Relative Image Quality Response of Industrial Radiographic Imaging Systems
• 2007 ASTM E746-07(2014) Standard Practice for Determining Relative Image Quality Response of Industrial Radiographic Imaging Systems
• 2007 ASTM E746-07 Standard Practice for Determining Relative Image Quality Response of Industrial Radiographic Imaging Systems
• 2002 ASTM E746-02 Standard Test Method for Determining Relative Image Quality Response of Industrial Radiographic Film
• 1993 ASTM E746-93(1998) Standard Test Method for Determining Relative Image Quality Response of Industrial Radiographic Film