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Computed Tomography (CT)

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Introduction

Computed tomography (CT) is a noninvasive procedure that is used to provide detailed views of the bones, blood vessels, brain, and dense tissues.  With CT, cross-sectional images are produced in a series of slices  similar to the slices that make up a loaf of bread.  These images can then be manipulated in a computer to create 3D images.  The detailed images help doctors diagnose abnormalities, such as tumors, bleeding, bone calcification, and cysts.  Select areas or the whole body can be imaged in a short amount of time.  CT is a painless procedure.
 
Preparation
 
CT is usually performed at an outpatient radiology center or the radiology department of a hospital.  Depending on the area that is to be imaged, you may need to fast prior to the procedure and arrive early to drink a contrast solution.  Contrast solution helps to enhance the CT images.  Contrast solution may also be administered via an IV.  You will receive specific preparation instructions when you make your appointment.
 
Procedure
 
You will lie on a narrow table, and your body will be positioned by the technician.  Your body positioning may be adjusted or changed during the procedure.  The table will glide into the scanner for a short time when the pictures are taken.  You will be asked to remain motionless and to occasionally hold your breath for short periods to prevent blurring the pictures.  CT scans are fast.  Depending on the type of equipment, the whole body can be imaged in less than 30 seconds.
 
A radiology technician may perform your test, but is not qualified to diagnose or discuss your condition or results with you.  A radiologist or your doctor will review your results with you.
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This information is intended for educational and informational purposes only. It should not be used in place of an individual consultation or examination or replace the advice of your health care professional and should not be relied upon to determine diagnosis or course of treatment.

The iHealthSpot patient education library was written collaboratively by the iHealthSpot editorial team which includes Senior Medical Authors Dr. Mary Car-Blanchard, OTD/OTR/L and Valerie K. Clark, and the following editorial advisors: Steve Meadows, MD, Ernie F. Soto, DDS, Ronald J. Glatzer, MD, Jonathan Rosenberg, MD, Christopher M. Nolte, MD, David Applebaum, MD, Jonathan M. Tarrash, MD, and Paula Soto, RN/BSN. This content complies with the HONcode standard for trustworthy health information. The library commenced development on September 1, 2005 with the latest update/addition on February 16, 2022. For information on iHealthSpot’s other services including medical website design, visit www.iHealthSpot.com.

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