Scatter correction for first-pass radiocardiography.
The effect of the dual window scatter subtraction method was tested for first-pass radiocardiography using 99Tcm. The photopeak window of 126-154 keV (20%) and Compton window of 93-125 keV (30%) were used. The set of scattered images was multiplied by a factor of 0.4 and subtracted from the primary images. The size of the correction was tested by recalculation among a group of 16 patients sent for cardiac output studies for various reasons. The average of the percentage increase following correction was 4.0% (range -1.1 to 11.7%). The size of scatter correction was rather small in individual patients, but consistent for the group of patients as a whole. There was a statistically significant difference between the raw and corrected cardiac output values.
Kauppinen
T
T
Department of Clinical Physiology, Tampere University Hospital, Finland.
Koskinen
M
M
Kööbi
T
T
D000368:Aged; D002302:Cardiac Output; D005260:Female; D015902:Gamma Cameras; D006321:Heart / Q000000981:diagnostic imaging* / Q000502:physiology; D006801:Humans; D007457:Iodine Radioisotopes; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging / Q000295:instrumentation / Q000379:methods; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012709:Serum Albumin; D013667:Technetium
D007457:Iodine Radioisotopes; D012709:Serum Albumin; D013667:Technetium