CT Scan or Computerized Tomography or Computed Axial Tomography (CAT)

CT Scanner

CT Scan is CT imaging in conjunction with computing algorithms to image the body. A CT scan uses a computer that takes data from several X-Ray images of structures inside a human’s or animal’s body and converts them into pictures on a monitor. In CT ,an  X-Ray generating  tube which is  opposite to   X-Ray detector  in a  ring  shaped apparatus rotate around  a  patient  producing  a computer generated  cross-sectional images. CT scan is required in the axial plane, while coronal and Sagittal images can be rendered by computer reconstruction. Radio contrast agents are often used in CT scan for enhanced delineation of Anatomy. Although radiographs provide higher spatial resolution, CT can detect more sensitive attenuated lesion on the X-Rays in short durations.

CT Scan Image

CT scans can be performed on every region of the body for a variety of reasons e.g., diagnostic, treatment planning, interventional or screening. Most CT scans are performed as outpatient procedures. Presently CT Scan  has  become  the test of  choice  in diagnosing  some urgent  and   emergent  conditions, such as cerebral hemorrhages ,pulmonary embolism ,aortic dissection and  obstructing  kidney stones. Computerized Tomography (CT scan) is a procedure that assists in diagnosing tumors, fractures, bony structures, and infections in the organs and tissues of the body. Advancement  in  CT technology has  increased the  resolution and  faster scanning  time  resulting  in  improvement  in    precision and  accuracy of  diagnosis.

CT Scan Procedure

  1. You will lie down on a slender slab that is slided into the center of the CT scanner.
  2. Inside the scanner, the machine’s x-ray beam rotates around you.
  3. A computer creates separate images of the body area, called slices. These images can be stored, viewed on a monitor, or printed on film.
  4. Three-dimensional models of the head area can be created by stacking the slices together.
  5. Movement is to be restricted during the CT Scan, since movement causes blurred images.
  6. You may be told to hold your breath for short periods of time.
  7. Complete scans usually take only a few minutes. The newest scanners can image your entire body, head to toe, in less than 30 seconds.

 Risks of CT Scan

  • Exposed to radiation
  • Allergic reaction to contrast dye
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