Gamma camera energy windows for Tc-99m bone scintigraphy: effect of asymmetry on contrast resolution. Work in progress. Radiology 1984 May;151(2):495-7
Date
05/01/1984Pubmed ID
6231657DOI
10.1148/radiology.151.2.6231657Scopus ID
2-s2.0-0021258208 (requires institutional sign-in at Scopus site) 13 CitationsAbstract
By raising the lower threshold of the Tc-99m energy window, rejection of scattered photons can be made more efficient. Unfortunately, with most gamma cameras significant nonuniformities are produced when the window is changed to an asymmetric setting. Recently introduced designs with gain stabilization of the photomultiplier tubes and improved energy correction maintain field uniformity even for an asymmetric window. To assess the impact of an asymmetric energy window on clinical images, 33 Tc-99m-MDP scintigrams of the lumbar spine were taken with symmetrical (126-154 keV) and asymmetric windows (135-154 keV). Bone:soft tissue ratios improved with the asymmetric window, and the resulting images were preferred by the physicians questioned.
Author List
Collier BD, Palmer DW, Knobel J, Isitman AT, Hellman RS, Zielonka JSAuthor
Robert Hellman MD Emeritus Professor in the Radiology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AbdomenBone and Bones
Diphosphonates
Female
Humans
Image Enhancement
Lumbar Vertebrae
Male
Radionuclide Imaging
Technetium
Technetium Tc 99m Medronate
