Assessment of Spatial Resolution Of planner digital X-Ray Machine By Using Modulation (Transfer Function(MTF

Abstract

Medical imaging of human body requires some form of energy, the energy used to produce the image must be capable of penetrating tissues then a multi step process by which information concerning patient anatomy and physiology was gathered and displayed with the modern technology. Radiographic images are useful for very wide range of medical indications. The image quality that is obtained from medical imaging device involve compromise better X-Ray image can be made when the radiation dose to the patient is optimum. Spatial resolution is usefulness in determining the accurate diagnosis, modulation transfer function MTF give the most complete characterization of the spatial resolution of the imaging device. This study was conduct in Antalia Medical Center, Khartoum, Sudan and the measurement was performed using X-check FLU phantom. The results of this study showed that the best resolution scored at higher energy 90 and 85 kv, where 100% resolution was scored for bar phantom with a frequency of 0.5 cycle/mm, 94% for 0.56 cycle/mm, 80.1% for 0.63cycle/mm and 75% for 0.71 cycle/mm all at 90 kv. The results showed that as the thickness of the bar decreases (it is frequency increases) the resolution deteriorate