WebJun 1, 2014 · Purpose: Flood-field uniformity evaluation is an essential element in the assessment of nuclear medicine (NM) gamma cameras. It serves as the central element of the quality control (QC) program, acquired and analyzed on a daily basis prior to clinical imaging. Uniformity images are traditionally analyzed using pixel value-based metrics …
Co-57 Flood Sources - Cardinal Health
WebIntrinsic uniformity floods for a dual-head gamma camera. (A) Head one reveals substantial nonuniformity with areas of increased and decreased intensity corresponding to the pattern of PMTs. This is characteristic of a poor calibration and can be corrected by repeating uniformity calibration. (B) Head two shows expected uniformity. Webimaging. The flood uniformity image can be evaluated numerically or graphically [7]. The NEMA protocol for intrinsic flood field uniformity analyzes both differential uniformity and integral uniformity. Differential uniformity is a measure of maximum rate of change over a short distance and integral uniformity is a measure of maximum deviation. income based apartments ft worth tx
Gamma camera-based method for acceptance of new cobalt-57 flood …
WebMay 1, 2024 · 1763 Purpose: In nuclear medicine, Cobalt 57 flood sources are commonly used to check gamma camera detector uniformity. These 57Co flood sources typically have a small concentration of 56Co and 58Co impurities which can affect detector uniformity measurements due to their high energy photon emission as noted by E. B. … WebJul 7, 2024 · Flood. A general and temporary condition of partial or complete inundation of 2 or more acres of normally dry land area or of 2 or more properties (at least 1 of which is … Webmeasurements of uniformity are performed with a medium or high energy collimator. Some gamma cameras are particularly sensitive to high energy contaminants and may show non-uniformities in the flood images when the quality control is performed with a low energy collimator. The use of a medium energy collimator, in place of a low energy incentive award nomination and approval form