MRI (Magnetic Resonance Imaging) and CT scans (Computed Tomography) are both categories of medical imaging devices that locate anatomical and pathological internal structures but have different methods which create image qualities which differ. MRI makes use of radio waves and magnetic fields and is excellent for finding soft tissue, hence its description in the clinical environment for musculoskeletal and neurological conditions. CT scans make use of x-rays, are faster, and are excellent for visually examining bone structures and detecting fractures.
What is MRI?
Brain and Spine: Diagnostic Stroke, Tumors, Multiple Sclerosis and other neurologic disorders.Musculoskeletal: Assess ligament tears, disc herniation and other joint problems.Soft Tissue: Image organs, muscles and ligaments.Cancer: Stage Tumors and track tumor size.A CT Scan will assist in detecting and evaluating: Bones: Fractures, tumors and other bone changes.Lungs: Pneumonia, emphysema and other lung conditions.Abdomen: Bleeding, tumors and other abdominal conditions.Emergencies: Rapid evaluation of trauma and other acute conditions.Advantages: Superior detail of soft tissues, no radiation exposure, generally safe for repeated imaging.
Major Differences Between MRI vs CT scan
Imaging Modalities
MRI uses magnetism and radiofrequency waves to create high-quality images and CT employs x-rays to capture cross-sectional pictures of the body.Image Quality: MRI excels in contrast resolution and possesses the finest ability in imaging soft tissue, nerves, joints, and the brain. CT is great with spatial resolution, so it is superior to MRI for bone imaging and for acute bleeding.
Time of the Study: CT examinations take much less time than MRI examinations. A CT scan may be in less than 1 minute to set-up (excluding any prep time) and scan, whereas standard MRI studies can take at least 20 minutes up to 50+ minutes, and the patient must remain motionless while being imaged.
Radiation
CT scans may provide a patient directly with a dose of ionizing radiation, whereas MRI does nothing that provides a direct exposure to ionizing radiation. Some groups might be safer by repeating an MRI (e.g. possibly applying MRI to pregnant women or as and when licensed).
Contraindication
Some metal implants/devices will exclude patients from undergoing an MRI because of the magnetism of MRIs.
Conclusion
MRI and CT scans are both good imaging modalities. MRI has the upper hand in soft-tissue imaging while CT would most likely be an option for bone imaging or for a quick screening examination. The choice for which scan or examination is done reduces to the clinical question, patient population, and resources available.
Frequently Asked Question
Q. What is the greatest benefit of MRI compared to CT?
The greatest benefit of MRI compared to CT scans is the capacity to create very detailed images of soft tissues, such as soft tissues like the brain,
Q. Where are CT and MRI applied?
CT (Computed Tomography) scan and MRI (Magnetic Resonance Imaging) are imaging techniques that generate images of the internal structure of the body to assess its anatomy for purposes of diagnosis.
Q. What are the four different types of scans?
Almost everyone has a general idea of what an X-ray is. We have all seen pictures like this on our local news. An X-ray is a type of electromagnetic radiation. It gives off darker regions of structures/principles made up of denser metals, like lead.
Q. Which scan is healthier: MRI or CT scan?
MRI is usually healthier than a CT scan.
Q. What are the names of the four types of scans?
X-ray, CT scan or CAT scan, MRI, and Ultrasound.
