title: Performance evaluation of two computed radiography systems and patient dose in pelvic examination.
abstract: This study was carried out to evaluate the performance of two computed radiography (CR) units. These evaluations became necessary following the introduction of CR systems in Sudan. Evaluation of the CR systems was performed using physical image quality parameters: signal transfer property, modulation transfer function, normalised noise power spectrum, detective quantum efficiency and the subjective contrast detail detectability. Patient dose was measured in terms of entrance surface air kerma estimated from tube output and exposure factors for 100 patients who had undergone pelvic X-ray examinations. Fuji computed radiography velocity system with columnar screen dose results was much lower than those using CR975 system with granular screen. Patient doses delivered by both systems were within the international diagnostic reference levels.
authors.affiliation: Radiation Safety Institute, Sudan Atomic Energy Commission, P.O. Box. 3001, Khartoum, Sudan hussaien128@hotmail.com.
authors.forename: E
authors.initials: E
authors.lastname: Elshiekh
authors.affiliation: Radiation Safety Institute, Sudan Atomic Energy Commission, P.O. Box. 3001, Khartoum, Sudan Department of Radiology & Molecular Imaging, Medical Physics Section; College of Medicine and Health Sciences, Sultan Qaboos University, Postcode 123, P.O. Box 35, Al-Khod, Oman.
authors.forename: I I
authors.initials: II
authors.lastname: Suliman
authors.affiliation: Department of Physics, Faculty of Science, University of Khartoum, P.O. Box 321, Khartoum, Sudan.
authors.forename: F
authors.initials: F
authors.lastname: Habbani
mesh_terms: D006801:Humans; D010388:Pelvis / Q000000981:diagnostic imaging*; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000295:instrumentation* / Q000379:methods*; D011874:Radiometry; D015203:Reproducibility of Results; D059629:Signal-To-Noise Ratio; D013397:Sudan; D014965:X-Rays