Measurement of the focal spot size of diagnostic X-ray tubes—a comparison of pinhole and resolution methods
- 1 July 1975
- journal article
- research article
- Published by Oxford University Press (OUP) in The British Journal of Radiology
- Vol. 48 (571), 572-580
- https://doi.org/10.1259/0007-1285-48-571-572
Abstract
The pinhole camera technique has been compared with resolution and other methods for measuring the focal spot dimensions fo diagnostic X-ray tubes. These comparisons show that the resolution method offers an accurate estimation of the focal spot dimensions without the difficulties normally encountered in pinhole camera techniques. Accuracy and reproducibility of the "star-test" resolution method is examined. The current standard specifications for pinhole camera measurements are also discussed, and in the light of results obtained, changes in these specifications are suggested, particulary with regard to correction factors for non-uniformity of the intensity distribution and manufacturing tolerances.Keywords
This publication has 9 references indexed in Scilit:
- Focal spot studies and electron focusing in a demountable X-ray tubePhysics in Medicine & Biology, 1974
- A modified pinhole camera method for investigation of X-ray tube focal spotsPhysics in Medicine & Biology, 1973
- Imaging of Focal Spots by Means of the Star Test PatternRadiology, 1972
- Some technical problems with diagnostic radiography at 20 to 40 kVpThe British Journal of Radiology, 1971
- A NEW METHOD TO DETERMINE THE FOCAL SPOT SIZE OF X-RAY TUBESAmerican Journal of Roentgenology, 1971
- Observations on Magnification RadiographyRadiology, 1969
- Some Considerations of Focal Spot SizesThe British Journal of Radiology, 1958
- Focal Spot SizesThe British Journal of Radiology, 1958
- On the determination of roentgen tube focal spot sizes by pin-hole camera roentgenographyActa Radiologica, 1957