Development and Assessment of Quality Control Phantom for Linearity and Uniformity

• 作者: Adam K. Sam Ghada A. Edam Mohamed E. M. Gar-Elnabi Mohammed A. Ali Omer Wadah M. Ali
• 来源期刊: 放射学期刊(英文)
• 学科: 医学
• 关键词: GAMMA CAMERA PHANTOM Flood-Field UNIFORMITY LINEARITY Quality Control
• 年，卷（期）: 2015,（2）
• 页码范围: 59-65
• 页数: 7页
• 分类号: R73

摘要

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.