What is the Difference between CT Scan And MRI ?

What is the Difference between CT Scan And MRI ?

  • When it comes about the differences between a CT scan and an MRI many people ask themselves which is better should I have a CT scan or MRI.
  • In this Article, you'll find 7 differences between a CT scan and MRI.

Basic principles of scanning

  • CT Scan stands for computed tomography and it is a medical imaging examination that uses x-rays in order to take images of the human body from different angles a computer then reconstruct all of the individual images into cross-sectional images or slices of the organs in the body so the doctors can see what's happening inside the body.
  • MRI stands for magnetic resonance imaging and it is a medical imaging examination that uses a strong magnetic field and radio waves to create images of the organs in the body the examination is based on identifying hydrogen atoms in the body and make them generate sinus that is detected by the MRI scanner so MRI does not use x-rays.
CT SCAN
CT SCAN

Harmful radiation

  • High doses x-rays are harmful to the body compared to a normal chest x-ray a CT scan can have 100 to 1000 times higher dose of radiation.
  • lately CT scans have become quicker so, x-rays exposure has decreased you should always discuss with your doctor about the risk of exposure versus the benefit of early detection of the disease on the other side.
  • MRI uses a strong magnetic field and no x-rays MRI has no harmful radiation.

Type of tissues scanned

  • CT Scan is most commonly used to identify the present size and location of tumours organs such as lungs brain structures like blood vessels and bones.
  • MRI is most commonly used to see tendons and ligaments spinal injuries bones and joints breasts blood vessels organs such as heart liver kidneys spleen and shows differences between normal and abnormal tissues.
MRI
MRI

 Noise

  • CT scan is that the CT machine does not produce unbearable noises whereas an MRI scanner can be very noisy.

Time

  • CT scan takes between a few seconds and a few minutes depending on the part of the body that is scanned.
  • MRI scan takes longer between 10 minutes and over an hour also depending on the part of the body that is scanned.

Metallic implants

  • Patients having metallic implants can usually perform CT scan even though the quality of the images may sometimes be affected.
  • MRI uses a powerful magnetic field the patient must remove all metallic belongings before the MRI scan.
  • If the patient has any metallic implant the radiologist will decide whether the MRI scan can be performed or not as the scanning these conditions can be harmful to the patient.

Cost


  •  CT scan is cheaper than an MRI scan.
  • So as to settle on a choice you have to decide after consulting your doctor.

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