Digital CR System is animaging techniqueusingX-raysto view the internal form of an object. To create the image, a beam of X-rays, a form ofelectromagnetic radiation, are produced by anX-ray generatorand are projected toward the object. A certain amount of X-ray is absorbed by the object, dependent on its density and structural composition. The X-rays that pass through the object are captured behind the object by adetector(eitherphotographic filmor a digital detector). The generation of flattwo dimensionalimages by this technique is calledprojectional radiography.Computed tomography(CT scanning) is where multiple two dimensional images from different angles undergo computer processing to generate 3D representations

Since the body is made up of various substances with differing densities, X-rays can be used to reveal the internal structure of the body on film by highlighting these differences usingattenuation, or the absorption of X-rayphotonsby the denser substances (likecalcium-rich bones). The discipline involving the study of anatomy through the use of radiographic films is known asradiographic anatomy. Medical radiography acquisition is generally carried out byradiographers, while image analysis is generally done byradiologists. Medical radiography includes a range of modalities producing many different types of image, each of which has a different clinical application.

Computed tomographyor CT scan (previously known as CAT scan, the “A” standing for “axial”) uses a high amount of ionizing radiation (in the form of X-rays) in conjunction with a computer to create images of both soft and hard tissues. These images look as though the patient was sliced like bread (thus, “tomography”– “tomo” means “slice”). The exams are generally short, most lasting only as long as a breath-hold.Contrast agentsare often used, depending on the tissues needing to be seen. Radiographers perform these examinations, sometimes in conjunction with a radiologist (for instance, when a radiologist performs a CT-guidedbiopsy).