SPET quality control: a comprehensive test procedure for evaluating the rotation system parameters COR-offset, y-shift and detector tilt.
This paper describes a method for SPET quality control that facilitates the determination of COR-offset, parallel y-shift and detector tilt by means of a single, comprehensive test using a special phantom consisting of three point sources. The evaluation of the method was performed by a series of measurements utilizing manually adjusted detector tilts and a simulation of y-shift by moving the phantom. The results show that y-shift and detector tilt are measured with reasonable accuracy, and that y-shift caused by variations in detector tilt can be differentiated from y-shift caused by other factors.
Nicoletti
R
R
Department of Radiology, Karl-Franzens University, Graz, Austria.
Vejda
M
M
Fueger
G F
GF
Sorantin
E
E
D005069:Evaluation Studies as Topic; D006801:Humans; D008961:Models, Structural; D011786:Quality Control; D012399:Rotation; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation / Q000592:standards*