X Ray Image Resolution. Subject contrast is the difference in x ray intensity that is transmitted through a lesion in comparison to the adjacent tissues. I image processing to enhance details ii image filtering to remove noise or detect high.
Ideally the smaller of the foci of the x ray tube should be used fine focus but if this does not enable a short exposure time to be used on a patient likely to move then the practitioner may need to use a broad focus. The key factors that influence the sharpness of an image relate to the size of the source of x rays focal spot the physical characteristics of the x ray detector system area and thickness and the presence of any motion blur because of the finite duration of all radiographic exposures. Blur and sharpness most radiologists have an intuitive sense of what constitutes poor resolution and can easily recognize a blurred image.
An image to determine the position of bones in a plaster cast following an orthopaedic reduction needs less resolution than the original image to diagnose the fracture.
Important lesion characteristics include the size density and atomic number. In the utct actis scanner the source to detector distance and the sizes of the detector elements are fixed. Blur and sharpness most radiologists have an intuitive sense of what constitutes poor resolution and can easily recognize a blurred image. An image to determine the position of bones in a plaster cast following an orthopaedic reduction needs less resolution than the original image to diagnose the fracture.