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The advent of multidetector CT, which offers improved resolution, has made it easier to differentiate abdominal structures without the need for the opacification with positive oral contrast. As a result, some have argued that neutral oral contrast may be preferable to positive oral contrast due to similar efficacy, cost-effectiveness, and ...
What is a CT Scan Without Contrast? It is not always necessary to use contrast to see problems in the abdomen or pelvis. Contrast may actually obscure conditions or anatomy.
Non contrast CT of the abdomen can be a good test for some conditions. Kidney stones are better seen on non contrast CT. Other conditions such as bleeding, perforated bowel, bowel obstruction, appendicitis are some of the conditions that can be diagnosed on a non contrast CT.
There are many indications for a CT of your abdomen and pelvis. Your doctor may ask for this test when looking for kidney stones, other causes of abdominal pain or nausea / vomiting (including appendicitis and diverticulitis), and assessing a wide variety of cancers involving organs in your abdomen or pelvis.
Abdominal CT scans can be done without contrast dye. Examples of abdominal CT scans that do not require contrast include those looking for the following: Nephrolithiasis or detection of kidney stones
The evaluation of the abdomen and pelvis is generally best done with IV and oral contrast. For acute pain (including suspected perforation) or when evaluating for urinary tract stones, a non-contrast study is recommended.
Answer: C. Abdomen CT with & without contrast involves a non-contrast scan (no IV, no PO) and 1 or more scans following IV contrast infusion. This protocol delivers 2-4 times more radiation to the patient compared to abdomen CT with IV contrast and is more expensive for patients and payers.
A non contrast CT is only appropriate for focused questions. Like if there is a kidney stone or bleed. It may allow the radiologist to diagnose other abnormalities but this is not certain. The best chance for a complete evaluation of your abdomen is with a CT with oral and IV contrast.
CT scans may be done with or without "contrast." Contrast refers to a substance taken by mouth or injected into an intravenous (IV) line that causes the particular organ or tissue under study to be seen more clearly.
The radiation from a CT scan is unlikely to harm your baby unless the scan is of your belly or pelvis. But your health professional might suggest another type of exam so that the baby isn't exposed to radiation.