Method and device for measuring respiratory cycle with CT scanner
A respiratory cycle and CT scanning technology, which is applied in the evaluation of respiratory organs, computerized tomography scanner, echo tomography, etc., can solve the problems of low integration, high cost, and complex design
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specific Embodiment approach 1
[0042] 1. First use the CT scanner to scan the lungs of the patient who is inhaling deeply at 90 degrees in the Z-axis direction. On the image obtained by the flat scan, select the uppermost edge of the patient's diaphragm area as the following scanning steps The specific selection method for the required scanning area is: perform low-pass filtering on the flat scanning image; calculate the gradient map of the filtered image; find out the area exceeding the threshold from the gradient map, that is, the uppermost edge of the diaphragm. step. Because in the lung area, there is and only the diaphragm will produce obvious gradient changes on the gradient map, so the setting of the threshold can be easily set only by combining the technical knowledge of CT image processing;
[0043] 2. Continuously scan the scanning range selected in step 1 for a period of time. While continuously scanning, use the CT signal detector to detect and sample the collected signals passing through the sc...
specific Embodiment approach 2
[0049]1. Place an identification block on the patient's chest that can attenuate the X-rays passing through it. The identification block needs to be fixed on the patient's chest. During the entire subsequent process, it should remain relatively still with the position of the chest where it is placed. The placement of the identification block It is best to choose the position where the chest moves the most when the patient breathes. In addition, the logo block is made of two layers of different materials. The material of the layer close to the patient's chest has less X-ray attenuation than that far away from the patient. The attenuation ability of the layer of material on the chest to X-rays;
[0050] 2. Use a CT scanner to scan the lungs of a patient who is inhaling deeply at 90 degrees in the Z-axis direction. On the image obtained by the flat scan, find out the logo block, and select the midline position of the logo block as a follow-up scan range;
[0051] 3. Continuously...
specific Embodiment approach 3
[0057] This embodiment discloses a device for measuring the respiratory cycle using a CT scanner. The device includes a CT scanner and a CT detector, and also includes a respiratory curve generation unit connected with the output of the CT detector, and a respiratory cycle analysis unit connected with the output of the respiratory curve generation unit.
[0058] The CT scanner further includes a unit capable of taking the human organ or external object whose position changes most obviously during the breathing movement as the scanning object.
[0059] The breathing curve generation unit further includes a unit for arranging the output data of the CT detector according to the time axis.
[0060] The respiratory cycle analysis unit includes a respiratory cycle calculation module, a respiratory cycle rationality determination module, a respiratory cycle stability determination module, and a respiratory cycle output module. The respiratory cycle calculation module uses the output ...
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