Why do C-arms use collimators?
The X-rays emitted by the C-arms used in the operating room are mainly ionizing radiation.
The radiation received by the patient in the operating room comes directly from the X-ray machine. The radiation that doctors, nurses and other operating room staff receive comes from the rays scattered by the patient’s body. Because rays are penetrating, rays can enter the human body and ionize cells in the body. The ions generated by ionization can erode complex organic molecules, such as proteins, nucleic acids and enzymes, which are the main components of living cells and tissues. Once they are destroyed, it can cause normal chemical processes in the body to be disturbed, and in severe cases, cells can die. Cells are damaged, inhibited, die or affect the next generation through genetic variation.
When no patient or objects are placed in the beam, it can be assumed that the radiation from the tube hits the inside of the intensifier and is absorbed. Next to the staff absorbed very little radiation. But once the patient is exposed, the radiation situation in the operating room is completely different. After the radiation from the C-arm enters the patient’s body, only about 1% of the radiation passes through the patient to the surface of the intensifier.
This is why the C-arm uses a collimator. The main function of the collimator is to control the irradiation field of rays and reduce the radiation damage of scattered rays to doctors and patients.
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Post time: Sep-29-2022