What is the difference between X-Ray, CT and MRI – Health Trends

Since X-ray, CT, and MRI are tests that are often accepted in hospitals, it is good to know the differences and precautions for each in advance (Photo = Clip Art Korea).

When you go to hospital because you are sick, various tests are carried out to determine the cause. In particular, there are many cases of taking simple radiography (hereafter X-ray), computed tomography (hereafter CT), and magnetic resonance imaging (MRI), which are imaging tests, but there are many people that they don’t know the difference. in. We learned about the principles and differences of X-ray, CT, and MRI.

X-Ray… the shortest examination time, used to diagnose fractures, etc.

An X-ray is a diagnostic test device used mainly in hospitals. Shortest and simple inspection timedo. The patient’s symptoms are diagnosed by the difference in hues that appear when radiation (hereafter referred to as X-rays) penetrates the human body. It is useful for identifying changes in joint shape due to changes in posture as the external shape of the bone can be checked. Representatively Diagnosis of fractures and dislocationsis used for There is nothing special to prepare for the exam, but accessories with metal objects should be removed.

CT…diagnosis of internal diseases/tumor, history of adverse reactions to contrast agents

A CT is a diagnostic examination device that uses X-rays to take horizontal cross-sections of the body. X-rays are passed through the human body, and the differences in the levels of radiation absorbed by each organ are calculated by a computer and visualized. A contrast medium is injected to make the lesions more visible, and the circular machine shoots from multiple angles to produce results, so unlike X-rays where organs are overlapped, they can be separated.

It is mainly used to examine tumors or traumatic diseases such as the lungs, liver, and bones of the stomach. especially Because it is easy to examine the chest and abdominal organs, it is widely used for the diagnosis of internal diseases and tumor detection. Use to check brain hemorrhage, brain tumor, and brain infarction during brain examinationproceed with The exam takes approximately 10 to 15 minutes.

Professor Ryu Yeon-cheol from the Department of Radiology of the College of Health Sciences at Gachon University said, “Since CT often uses a contrast medium, If an adverse reaction occurs or has a history after administration of the contrast medium, the medical staff must be notified prior to the test.” he advised.

MRI…diagnosis of soft tissue/nervous tissue, limited while wearing magnetic metal/pacemaker

An MRI is a diagnostic device that takes tomographic images of the human body using a strong magnetic field. It can be confused with CT because it is examined inside the round machine, but because it uses a strong magnetic field, the machine is relatively long and makes a loud sound.

MRI has no radiation exposure. The advantage is that the human body can be seen from all directions, such as horizontally, vertically and In addition, it can identify much more detailed and soft tissues than using X-rays. Easy to diagnose soft tissues (muscles, tendons, ligaments) and nervous tissues (brain, spinal cord, discs)do.

Professor Ryu Yeon-cheol said, “MRI takes 30 to 50 minutes longer than CT. It is difficult to take a picture when the patient is in a critical condition“It’s also sensitive to motion, so when the patient moves, the image quality deteriorates and it uses a magnetic field. Filming is restricted if you are wearing a device such as a pacemaker or metal that may be magnetic.It does,” he explained.

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