Tungsten alloy post-patient collimator is present between the patient and the detector on a CT machine, which serves to ensure good image quality, minimize the interference of scattered rays from other directions, and to reduce unnecessary radiation doses for the patients. Tungsten alloy post-patient collimator improves the slice sensitivity profile by giving a more rectangular shape.
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There are a lot of tungsten alloy leaves on a collimator. And these leaves are evenly distributed. So it puts forward extremely high requirements on the thickness, flatness and surface roughness of these tungsten alloy leaves.
You know, CT examination of the lungs is one of the important means of screening novel coronary pneumonia (COVID-2019). Although CT is only an auxiliary diagnostic tool, its role cannot be ignored as pneumonia infected by COVID-2019 has special imaging features. Therefore, in recent months, the demand for CT machines has increased. Correspondingly, as an important radiation shielding component (limiting the ionizing radiation range), the output of tungsten alloy collimators including tungsten alloy post-patient collimator increases accordingly.
