TITLE:
Development and Assessment of Quality Control Phantom for Linearity and Uniformity
AUTHORS:
Mohamed E. M. Gar-Elnabi, Wadah M. Ali, Mohammed A. Ali Omer, Adam K. Sam, Ghada A. Edam
KEYWORDS:
Gamma, Camera, Phantom, Flood-Field, Uniformity, Linearity, Quality Control
JOURNAL NAME:
Open Journal of Radiology,
Vol.5 No.2,
May
26,
2015
ABSTRACT: Abstract:
The aim of this study was to develop a cheap, locally made and friendly applicable
phantom for gamma camera quality control and to test its validity relative to standard
results (intrinsic and extrinsic spatial linearity and intrinsic and extrinsic uniformity)
of gamma camera SPECT. And the significance of this experimental study was to introduce
a multi-purpose phantom for gamma camera which could overcome the risk accompanied
by quality control test procedure such as detector crystal damage and the appearance
of moiré patterns. The results of the developed phantom showed an average count
difference of 0.7% relative to the standard phantom and about 4% in X- to Y-axis
directions relative to the standard phantom. Also, the measured absolute linearity
was 0.63 mm in X direction and 0.64 mm in Y direction for the UFOV compare with
0.70 mm value of acceptance test. And the I.U. and D.U. of the developed phantom
were 3.18% and 2.27% respectively for the UFOV relative to the standard phantom
I.U. and D.U. (2.0% and 1.5%) for the UFOV respectively.