ASTM E1165-92(1996)E1
Historical Standard: ASTM E1165-92(1996)E1 Standard Test Method for Measurement of Focal Spots of Industrial X-Ray Tubes by Pinhole Imaging
SUPERSEDED (see Active link, below)
ASTM E1165
1. Scope
1.1 This test method provides instructions for determining the length and width dimensions of line focal spots in industrial X-ray tubes (see Note 1). This determination is based on the measurement of an image of a focal spot that has been radiographically recorded with a 'pinhole' projection/imaging technique.
Note 1Line focal spots are associated with vacuum X-ray tubes whose maximum voltage rating does not generally exceed 500 kV.
1.2 This test method may not yield meaningful results on focal spots whose nominal size is less than 0.3 mm (0.011 in.). (See Note 2.)
Note 2The X-ray tube manufacturer may be contacted for nominal focal spot dimensions.
1.3 This test method may also be used to determine the presence or extent of focal spot damage or deterioration that may have occurred due to tube age, tube overloading, and the like. This would entail the production of a focal spot radiograph (with the pinhole method) and an evaluation of the resultant image for pitting, cracking, and the like.
1.4 Values stated in SI units are to be regarded as the standard. Inch-pound units are provided for information only.
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.
2. Referenced Documents (purchase separately) 
The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Papers
KlausBavendiek,UweHe New measurement methods of focal spot size and shape of X-ray tubes in digital radiological applications in comparison to current standards, WC-NDT 2012, Durban, South AfricaASTM Standards
E1000 Guide for Radioscopy
E1255 Practice for Radioscopy
E2002 Practice for Determining Total Image Unsharpness in Radiology
E2033 Practice for Computed Radiology (Photostimulable Luminescence Method)
E2698 Practice for Radiological Examination Using Digital Detector Arrays
European Standards
EN12543-5 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 tubesKeywords
focal spot; pinhole camera; pinhole imaging; X-ray; X-ray tube;
DOI: 10.1520/E1165-92R96E01
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