Assessment of Collimator Accuracy for X-Ray Machines in Khartoum State

Abstract

The lack of QC program contributes to the image quality deterioration, with the consequential increase in wasting of films and repetition of imaging studies, thus increase the radiation exposure for both patients and worker This study was aimed to evaluate of collimator accuracy of x-ray machine in Khartoum state hospitals, the study include 10 x-ray units from different radiology department in Khartoum state hospitals tested by 8 coins placed in the edges of the light field and one in the anode direction, which was opened so as to visually observe the light field and exposed to x- radiation using exposure factors of 50kV, 100mA ,0.5s and processed for images of the alignment of the light field to the x-ray field and processed. And the measurements were made with the meter rule. Our study showed that there is high percentage of light field and x-ray field congruence about 70% and lower percentage of misalignment 30% and x-ray beam central is alignment with the cassette holder. Finally the future study must be large case for QA programs and contains all QC tests for x-ray machines.