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What are the common human examination equipment in hospital radiology departments?

What equipment is commonly used in hospitals to take X-rays? Hospital radiology examinations usually include three categories: DR (digital film-taking machine, commonly known as “X-ray machine“), CT (computed tomography), and MRI (magnetic resonance imaging). For most people, the collective term is “taking fluoroscopic films”, so what are the specific differences between the three?
DR examination is also commonly known as taking X-rays. DR is based on ordinary X-ray filming and developed into digital X-ray filming. To put it simply, it is an advanced version of traditional X-ray, but the essence is still the same. It mainly uses the penetrating principle of X-ray. Although the examination site is the same as that of ordinary X-rays, the image resolution of DR is significantly higher than that of X-rays, and the radiation dose is also much lower.
DR examination is commonly used to take pictures of the human chest and bones, but can also take pictures of other parts, such as the abdomen, teeth, skull, etc. It has a wide range of users and can be used to examine various parts of the body. Digital images can be obtained within a few seconds after exposure. The imaging speed is fast and the price is cheap, which greatly improves work efficiency and facilitates the diagnosis and treatment of clinically severe and emergency patients.
Standing X-ray imaging is the preferred examination content for measuring the biological force lines of the human body’s weight-bearing bones, smooth lines of symmetrical structures, and scoliosis angles. This is fundamentally different from CT and MRI lying down imaging in clinical significance. During the clinical treatment of the spine and lower limbs, correction and joint replacement surgery are generally required. Before and after the surgery, standing weight-bearing X-rays need to be taken to analyze the condition, clarify the diagnosis and observe the treatment effect.
The principle of CT examination is that X-rays pass through the human body in layers, which is like cutting bread into thin slices, and each slice can be spread out and viewed. When you encounter trauma and suspect that a bone has been injured, you can choose CT to observe hidden injuries or soft tissue injuries.
CT is suitable for the head, chest, abdomen, pelvis, spine, limbs, bones, etc. Due to its special diagnostic value, it has been widely used in clinical practice, especially in the diagnosis of tumors. However, because CT equipment is relatively expensive and the examination cost is also high, the examination and diagnostic value of certain parts, especially qualitative diagnosis, still has certain limits, so CT examination is not regarded as a routine diagnostic method in clinical practice. In addition, the radiation dose of CT diagnosis is greater than that of DR examination, so women who are pregnant or preparing for pregnancy should not undergo CT examination.
MRI, also known as magnetic resonance imaging, is a type of tomography. It uses magnetic resonance phenomena to obtain electromagnetic signals from the human body and reconstruct human body information. The examination can obtain cross-sectional, sagittal, and coronal images with high spatial resolution, making it the first choice for testing the nervous system and spine.
Whether it is DR or CT, due to insufficient resolution of some soft tissues, the diagnosis of soft tissue diseases has become their shortcoming. The advantage of magnetic resonance is that it can clearly display soft tissue diseases. It is better than CT in examining the bladder, rectum, uterus and joint muscles. MRI is suitable for neurological lesions, cardiovascular system, chest lesions, systemic soft tissue lesions, etc. We are a manufacturer of X-ray machines and their accessories. If you are interested in DR or X-ray machines, please feel free to contact us. Whatsapp:+86 18953679166. Email:

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