Assessment of Conventional and Digital x-ray Image Quality using Prototype Phantom

Abstract

Medical imaging of the 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 a very wide range of medical indications, including the diagnosis of broken bones, lung cancer, cardiovascular disorders, etc.In most cases, the image quality that is obtained from medical imaging devices involves compromise- better x-ray images can be made when the radiation dose to the patient is optimum, of course, patient safety and comfort must be considered when acquiring medical images. Rather, the power levels used to make medical images require a balance between patient safety and image quality.The objective of this study was assessing the diagnostic x-ray machine resolution used MTF in order to find the optimum Kv relative to machine type.SpatialResolution is the principal component of image qualityit‟srefers to the ability to see small detail, and an imaging system has higherspatial resolution if it can demonstrate the presence of smallerobjects in the image Spatial Resolution is usefulness in determining an accurate diagnosis. Modulation Transfer Function MTFgives the most complete characterization of the spatial resolution of an imaging device; Actual measurements were performed with ten models of medical image devices and prototype phantom consisted of five wires with different thickness and Kv. The MTF was calculated from the amplitude values of the extracted basic frequency components in the sinusoidal waveform. Resultant MTFs clearly indicated the difference in resolution for ten x-ray machines.