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Computed Tomography (CT Scan)

By Editorial Team (Y)
March 3, 2022
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What is Computer tomography?

By using X-rays and computer technology, a computed tomography (CT) scan can provide your doctor with highly detailed images of your body in cross-sectional views. Your physician may order a CT scan if he suspects a fracture that does not show up on an x-ray, such as on your collarbone, or pelvis, a tumor, or if you have had severe injuries to your abdomen, chest, spinal cord, or pelvis. A CT scan is painless.

The CT scanner is a cylinder-like tube. You will lie still on a table that slides into the center of the scanner. An X-ray tube will rotate around you and take multiple pictures from different directions. A computer combines these X-rays into clear images on a television monitor. If your doctor needs to see specific areas of your body more clearly, you may need to be injected with a dye or drink a substance to make this possible. Be sure to inform your doctor of any allergies you have and if you are pregnant before having a CT scan.

CT scan purpose

Your specialist may prescribe a CT scan for such purposes as:

  • Analyze muscle and bone tissue, for example, bone tumors and breaks 
  • Pinpoint the area of a tumor, disease, or blood cluster 
  • Guide strategies, for example, surgery, biopsy, and radiation treatment 
  • Identify and screen ailments and conditions, for example, growth, coronary illness, lung knobs, and liver masses 
  • Screen the viability of specific medications, for example, growth treatment 
  • Identify wounds and inner bleeding 

Computed tomography images help a lot in the medical field. Here are some of the CT images used:

  • one of the quickest and most precise devices for inspecting the chest, stomach area, and pelvis since it gives itemized, cross-sectional perspectives of a wide range of tissue.  
  • used to look at patients with wounds from injury, for example, an engine vehicle mishap. 
  • performed on patients with intense side effects, for example, chest or stomach agony or trouble relaxing. 
  • regularly the best technique for distinguishing a wide range of malignancies, for example, lymphoma and diseases of the lung, liver, kidney, ovary, and pancreas since the picture enables a doctor to affirm the nearness of a tumor, measure its size, recognize its exact area and decide the degree of its association with other close-by tissue. 
  • an examination assumes a huge part of recognizing, analyzing, and treating vascular ailments that can prompt stroke, kidney failure, or even problems. CT is regularly used to evaluate for aspiratory embolism (blood coagulation in the lung vessels) and in addition to aortic aneurysms.  
  • it is priceless in diagnosing and treating spinal issues and wounds to the hands, feet, and other skeletal structures. It can indicate even little bones and also encompassing tissues, such as muscle and veins. 

Prepare for CT scan

To prepare for a CT scan, you should wear casual, baggy garments to your exam. However, you might be given an outfit to wear for the procedure.


Metal articles, including gems, eyeglasses, dentures, and clasps, may influence the CT pictures and should be left at home or evacuated before your exam. You may likewise be made a request to evacuate listening devices and removable dental work. Ladies will be made a request to evacuate bras containing a metal underwire. You might be requested to expel any piercings if conceivable.

Preparation for the CT scan involves not eating or drinking anything for a couple of hours if differentiated material will be utilized as a part of your exam. In addition, you should inform your doctor of all drugs you are taking and the off chance that you have any hypersensitivities. In case you have a known hypersensitivity to differentiate material or “dye,” your specialist may endorse prescriptions (as a rule a steroid) to diminish the danger of an unfavorably susceptible response. These prescriptions should be taken 12 hours before the organization of the differentiation material. To evade pointless deferrals, contact your specialist before the correct time of your exam.

Additionally, inform your specialist about any current sicknesses or other therapeutic conditions and whether you have a past filled with coronary illness, asthma, diabetes, kidney disorder, or thyroid issues. Any of these conditions may expand the danger of an uncommon unfriendly impact.

Ladies should dependably educate their doctor and the CT technologist if there is any possibility that they might be pregnant.

CT Scan Procedure

From various perspectives, CT scanning works, particularly like other x-ray examinations. Distinctive body parts assimilate the x-rays in changing degrees. This urgent distinction in assimilation permits the body parts to be recognized from each other on an x-ray film or CT electronic picture.

  • In an ordinary x-ray exam, a little measure of radiation is gone for and goes through the piece of the body being analyzed, recording a picture on an exceptional electronic picture recording plate. Bones seem white on the x-ray; delicate tissue, for example, organs like the heart or liver, appears in shades of dim, and air seems dark.   
  • With CT scanning, various x-ray pillars, and an arrangement of electronic x-ray identifiers, turn around you, measuring the amount of radiation being assimilated all through your body. Now and then, the examination table will move amid the scan, with the goal that the x-ray shaft takes after a winding way. An exceptional PC program forms this vast volume of information to make two-dimensional cross-sectional pictures of your body, which are then shown on a screen. CT imaging is contrasted with investigating a piece of bread by cutting the roll into thin cuts. At the point when the picture cuts are reassembled by PC programming, the outcome is an exceptionally definite multidimensional perspective of the body’s inside.

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