Question

What are the differences between a colonoscopy and a PET scan

Answer 1

colonoscopy and pet scan are 2 different procedure. so, no comparision can be made.

Colonoscopy - Colonoscopy means the visualization of the colon (Large intestine) and rectum. It is used to detect disease of the colon like reason fir colon bleeding, to detect any mass or cancer. It can also use for the diagnostic procedure like, we can take biopsy through colonoscopy for further study.

In the colonoscopy, a gastroenterologist enters a flexible tube (Diameter of the tube is approx 1/2 inches) into the large intestine through the rectum. That tube has a high definition camera and a flashlight by which the doctor inspects the interior part of the rectum and colon.

PET scan - Pet scan is known as a Positron emission tomography scan. It is an imaging test done with a CT SCAN or MRI machine.

Radioactive substances are injected through the oral route, intravenous route, or inhaled into the body, the injection route is depend upon the organ you want to study. The radioactive substances tend to deposit on the area where the chemical activity is higher. Then we can detect the chemical changes through imaging.

PET Scan is mainly used for cancers, brain tumors, heart disease, etc.