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X-Rays Describe X-rays. Images of internal organs, bones, and tissues can be captured on film or in digital form using X-rays, which emit invisible electromagnetic energy beams. Standard X-rays are used for a variety of purposes, such as the diagnosis of malignancies and bone injuries. To create images of the body, its organs, and other internal structures for diagnostic purposes, X-rays use external radiation. A "negative" type image is created when X-rays penetrate human structures and land on specially treated plates (similar to camera film) or digital media (the more solid a structure is, the whiter it appears on the film). Different bodily components permit various amounts of the X-ray beams to pass through when the body is exposed to X-rays. The body's soft tissues, including the blood, skin, fat,  and   The majority of the X-ray is able to pass through muscle and appears as dark grey on the film or digital medium. Soft tissue is more permeable to X-rays...

CT scan  The CT Scan: Who Invented It? British engineer Godfrey Hounsfield of EMI Laboratories developed the first CT scanner that was marketed to the public in 1972. He and the physicist Dr. Allan Cormack jointly developed the technology. Later, the 1979 Nobel Prize in Physiology and Medicine was jointly given to both scientists. Hounsfield became Sir Godfrey Hounsfield in 1981 after receiving a knighthood. Above: Godfrey Hounsfield with the first commercial CT scanner. However, Johann Radon's 1917 "Radon transform" mathematical theory, which was the basis for the technology, was what actually made it possible. The "Algebraic Reconstruction Technique," developed in 1937 by Polish mathematician Stefan Kaczmarz, is another mathematical innovation that Hounsfield relied on. Hounsfield applied both school of thought to develop Interestingly, Hounsfield was unqualified because he dropped out of school at the young age of 16. Therefore, he received just h...