Assessment of Spatial Resolution on SPECT using Image Processing

: The main objective of this study to assess the spatial resolution of SPECT gamma camera using developed Algorithm via image processing procedure. Usually assessment done through visual inspection of phantom images i.e. visual perception trend; in this study, separate algorithm was developed using Interactive Data Language IDL software to quantify the resolution with Modulation Transfer Function (MTF). The data were collected from Departments of nuclear medicine in main hospitals in Khartoum – Sudan (RCIH & RICK) in period from 2015 to 2017; images of QC test were taken from SPECT gamma camera as DICOM format. The result showed that the resolution for minimum object used 4mm was 70% and increased with object size increased to reach 100% resolution for an object size of 10 mm i.e. 100% resolution corresponds to the coordinate of the MTF at 10% and frequency of 0.05cycle /mm. Inconclusion the developed algorithm can be used objectively and improved as required without looking for expertise from other country, as well it can be made to check the acceptance of the device performance regardless the built-in programs.