With the development of science and technology, imaging examinations are increasingly playing an important role in disease examinations. Many patients still do not clearly distinguish common imaging examinations such as DR, CT, and MRI during the examination.
The medical imaging doctor of the Children's Hospital Affiliated to Shandong University will tell you about the differences between DR, CT, MRI, and how to choose.
Speaking of DR, maybe everyone is unfamiliar with it. When it comes to X-rays, they suddenly realize it.
DR is the abbreviation of Digital Radiography in English, and is called digital X-ray photography in Chinese. Cui Ruodi, a medical imaging department at the Children's Hospital Affiliated to Shandong University, said that this is a technology that uses X-ray characteristics to penetrate human imaging. "DR is what we said in the past to take X-rays. It is characterized by fast and economical. Because the exposure time is extremely short, only a few thousandths of a second, the radiation is minimal. But it is a two-dimensional plane imaging, and the imaging effect is affected by many factors in the outside world, such as shooting angle and lesions tend to overlap, etc.."
Everyone is familiar with CT, but do you know the Chinese name of CT?
CT is the abbreviation of Computerized Tomography in English, and is called computer tomography in Chinese. It uses X-rays to pass through the human body and arrive at the detector to receive ray information, and then the computer calculation process is performed to perform secondary imaging into a cross-sectional layered display. "CT is characterized by its high density resolution, which can display more tissue information, and has a high diagnostic value for the disease. The radiation volume is relatively slightly higher than DR, but it is all within the safe range." Cui Ruodi said.
MRI, everyone knows when it comes to doing nuclear magnetic field.
, the magnetic resonance imaging in Chinese, was replaced by doctors with MRI. MRI is the abbreviation of Magnetic Resonance imaging in English. It is an inspection method that uses external reinforcement magnetic field to generate signals generated by the hydrogen nucleus in the human body in the magnetic field, and is computer reconstruction and imaging. "There is no radiation on the magnetic resonance and is suitable for examinations of all organs throughout the body, especially for neurological diseases such as intracranial hematoma , brain tumors, intracranial aneurysms, arteriovenous vascular malformations, intravertebral tumor , syringomycetes, etc.." Cui Ruodi said, but MRI also has shortcomings, and its imaging speed is slow, and its accuracy for lung examinations is relatively poor compared to X-rays.
Cui Ruodi said that in fact DR, CT, and MRI themselves have their own advantages and disadvantages. During the disease diagnosis and treatment process, clinicians will choose appropriate examinations according to their condition.
"If respiratory diseases are preferred to chest DR. If bone lesions are observed, DR and CT will be preferred to check . If limb trauma is suspected of bone damage, DR will be preferred to choose. If the lesions are severe or minor fractures need further observation, CT examination should be selected. The advantages of CT computer three-dimensional reconstruction will make the diagnosis clearer. For central nervous system , joints, and soft tissue lesions, of course, MRI will be preferred." Cui Ruodi said.
For children's examinations, some parents believe that MRI does not have radiation and all examinations require magnetic resonance, which is inappropriate. Cui Ruodi said that especially for patients with craniocerebral trauma, if there is a fracture, the CT examination should be clearer than MRI. In addition, MRI is not suitable for pulmonary examinations.
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