An A level video with basic descriptions of the use of image improvement techniques in X rays.
Photoelectric effect, Radiology Reference Article
A level Medical Physics - CAT / CT scanners
The AAPM/RSNA Physics Tutorial for Residents
A level Medical Physics - X rays- the X ray tube
X-Ray Image Intensifier - an overview
Contrast Radiography, Conditions & Treatments
Intensifying Screens
A level Medical Physics - X rays - image intensifiers and contrast
24.1d X-Ray Image Sharpness and Contrast
mas vs. density
Image quality - Radiology Cafe
24.1d X-Ray Image Sharpness and Contrast