ASTM E2903-18
Standard Test Method for Measurement of the Effective Focal Spot Size of Mini and Micro Focus X-ray Tubes

Standard No.

ASTM E2903-18

Release Date

2018

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E2903-18

Scope

1.1 The image quality and the resolution of X-ray images highly depend on the characteristics of the focal spot. The imaging qualities of the focal spot are based on its two dimensional intensity distribution as seen from the imaging place. 1.2 This test method provides instructions for determining the effecting size (dimensions) of mini and micro focal spots of industrial X-ray tubes. It is based on the European standard, EN 12543–5, Non-destructive testing Characteristics of focal spots in industrial X-ray systems for use in non-destructive testing Part 5: Measurement of the effective focal spot size of mini and micro focus X-ray tubes. 1.3 This standard specifies a method for the measurement of effective focal spot dimensions from 5 up to 300 µm of X-ray systems up to and including 225 kV tube voltage, by means of radiographs of edges. Larger focal spots should be measured using Test Method E1165 Standard Test Method for Measurement of Focal Spots of Industrial X-Ray Tubes by Pinhole Imaging. 1.4 The same procedure can be used at higher kilovoltages by agreement, but the accuracy of the measurement may be poorer. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 E2903-18 Referenced Document

• ASTM E1165 Standard Test Method for Measurement of Focal Spots of Industrial X-Ray Tubes by Pinhole Imaging
• ASTM E1255 Standard Practice for Radioscopy
• ASTM E1742/E1742M Standard Practice for Radiographic Examination*， 2024-01-17 Update
• 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 E2033 Standard Practice for Computed Radiology (Photostimulable Luminescence Method)
• ASTM E2446 Standard Practice for Manufacturing Characterization of Computed Radiography Systems*， 2023-08-01 Update
• ASTM E2597/E2597M Standard Practice for Manufacturing Characterization of Digital Detector Arrays*， 2022-01-01 Update
• ASTM E2698 Standard Practice for Radiographic Examination Using Digital Detector Arrays

ASTM E2903-18 history

• 2018 ASTM E2903-18 Standard Test Method for Measurement of the Effective Focal Spot Size of Mini and Micro Focus X-ray Tubes
• 2013 ASTM E2903-13 Standard Test Method for Measurement of the Effective Focal Spot Size of Mini and Micro Focus X-ray Tubes