Nonuniformity intrinsic flood artifact caused by point-source syringe needle.
The purpose of this study was to investigate the cause of a nonuniformity artifact seen on an intrinsic flood.


METHODS
Intrinsic floods were acquired on three different cameras using a point source in a 1-cc syringe, with and without a needle attached. Floods were obtained with the syringe placed perpendicular and parallel to the camera face.


RESULTS
A nonuniformity artifact was evident if a syringe with a needle was placed perpendicular to the crystal face.


CONCLUSIONS
If a syringe is used as a point source during the acquisition of an intrinsic quality control flood, the needle should not be placed perpendicular to the camera face.
Hackett
M T
MT
Nuclear Medicine Service, Department of Veterans Affairs Medical Centers, Lexington, Kentucky 40511-1093, USA.
Magoun
S L
SL
Thompson
R B
RB
D016477:Artifacts; D004867:Equipment Design; D015902:Gamma Cameras; D006801:Humans; D009339:Needles; D011786:Quality Control; D019275:Radiopharmaceuticals; D013499:Surface Properties; D013594:Syringes; D013667:Technetium; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation
D019275:Radiopharmaceuticals; D013667:Technetium