As an alternative method to the 100 mm long ionization chamber, which is normally used to measure the CT dose index (CTDI), some studies use smaller semiconductor photodetectors to measure the single ...

In a computed tomography (CT or CAT) scan, the X-ray beam moves in a circle around the body. This allows many different views of the same organ or structure, and provides much greater detail. The ...

This content was created by our physicians and experts. When it comes to getting an X-ray or CT scan, many people – especially parents of young children and teenagers – are concerned about radiation.

This content was created by our physicians and experts. To diagnose certain injuries and conditions, a doctor may order CT scan (also known as a "CT exam" and commonly, if incorrectly, called a "CAT ...

Abstract: The Computed Tomography (CT) scan image is the most reliable method and mostly used in radiotherapy as it is of low cost yet efficient compared to the Magnetic Resonance Imaging (MRI) scan.

the descending colon and the sigmoid colon. Because it only involves the last few segments of your colon, a sigmoidoscopy doesn’t require as much preparation as a colonoscopy. “Unlike a ...

Micrograph by Dr Torsten Wittmann, Science Photo Library A colored 3D computed tomography (CT) scan of the colon of ... “The rectum is different than the sigmoid colon,” she explains.

Low-dose computed tomography, or CT scan, is a highly recommended test for smokers. CT scans provide better diagnostic images than X-rays. These better images allow doctors to detect problems ...

Recent evidence suggests that serrated polyps with features of larger size, sessile serrated polyp histology, cytologic dysplasia and location in the proximal colon may have a higher risk of ...

A CT scan is a diagnostic imaging exam that uses X-ray technology to produce images of the inside of the body. A CT scan can show detailed images of any part of the body, including the bones, muscles, ...

Retrospective multicenter study for assessment of association between imaging change and outcome after treatment of regorafenib: KSCC1603. This is an ASCO Meeting Abstract from the 2019 ...

My entire life changed that day in July 2021 when I was diagnosed with cancer of the sigmoid ... CT scan every six months. I had a mild scare recently in December 2023 when they found a small ...