Abstract
HomeRadiologyVol. 98, No. 1 PreviousNext ArticlesEffective Focal Spot SizeJoseph J. Bookstein22, Walter SteckJoseph J. Bookstein22, Walter SteckAuthor Affiliations Department of Radiology University Hospital University of Michigan Medical CenterAnn Arbor, Mich. 48104Joseph J. Bookstein22Walter SteckPublished Online:Jan 1 1971https://doi.org/10.1148/98.1.31MoreSectionsPDF ToolsImage ViewerAdd to favoritesCiteTrack CitationsPermissionsReprints ShareShare onFacebookTwitterLinked In AbstractThe authors present a new method of determining focal spot size in which the effective size of the focal spot is indicated and irregularities of shape and distribution of emitted radiations are considered. The size of the focal spot as determined by this method is much smaller than that determined by the pinhole method, although the exact relationship is not constant. The fact that the focal spot behaves as if it were smaller than its nominal size helps explain why geometric distortion with magnification techniques is less than that anticipated from the nominal focal spot size.Article HistoryAccepted: Oct 1970Published in print: Jan 1971 FiguresReferencesRelatedDetailsCited ByJournal of Urology, Vol. 109, No. 6Physics in Medicine and Biology, Vol. 18, No. 4Recommended Articles RSNA Education Exhibits RSNA Case Collection Vol. 98, No. 1 Metrics Altmetric Score PDF download
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