Respiratory gating system and control method based on three-dimensional vision

Abstract

The invention discloses a respiratory gating system and a control method based on three-dimensional vision. The respiratory gating system comprises a target, a three-dimensional vision measuring unit, a data analysis unit, a communication unit and a control unit. The three-dimensional vision measuring unit tracks and positions the target in real time, and a three-dimensional coordinate sequence is obtained. The data analysis unit processes the coordinate sequence, a respiratory movement curve is obtained, and a respiratory gating signal is generated at the position of the set threshold. The communication unit is responsible for conducting interaction with medical image equipment and finishing triggering collecting of the medical image equipment by the respiratory gating signal. The control unit is responsible for controlling the three-dimensional measuring unit, the data analysis unit and the communication unit so as to finish the whole system function coordinately. The respiratory gating system is simple in structure, high in accuracy, high in reliability and easy to operate.

Description

technical field [0001] The invention belongs to the field of digital automatic control, and specifically relates to a system and a control method for collecting and analyzing a patient's breathing signal by using a stereo vision technology, and outputting a breathing gating signal at a set threshold. Background technique [0002] When applying medical imaging equipment (such as CT, MRI, etc.), due to the patient's respiratory movement, respiratory artifacts are usually generated during chest and abdomen imaging, which has a significant impact on the clarity of the formed image, resulting in poor imaging quality. decreased, thus affecting the diagnosis of the lesion. In the current medical imaging equipment, in order to solve the problem of chest and abdomen imaging artifacts, respiratory gating technology is usually used to avoid and compensate. [0003] The principle of respiratory gating technology is to collect respiratory signals through respiratory monitoring equipment...

AI Technical Summary

Problems solved by technology

[0018] 1. The disadvantage of respiratory gating technology based on respiratory flow is that the patient needs to wear a mask to measure the air flow, which has poor tolerance;

[0019] 2. The disadvantage of the respiratory gating technology based on the pressure sensor is that the airbag needs to be bound to the body surface during use, which brings discomfort to the patient, and the operation is more complicated, and it is more difficult to operate for the elderly and children;

[0020] 3. Respiratory gating technology based on thermal sensors is likely to cause cross-infection between patients because it should be placed on the patient's mouth and nose;

[0021] 4. Respiratory gating technology based on body surface characteristics requires the patient to expose all the chest and abdomen, which will bring privacy concerns to the patient. For obese people and children whose body surface characteristics are not obvious, the gating effect is not good; at the same time, if The RPM system of Varian Company of the United States based on body surface markers uses a single camera for image acquisition, which has high requirements for the target and must be composed of multiple feature points with standard spacing. In addition, the output respiratory signal can only be Two-dimensional coordinate direction, but the actual target movement is three-dimensional coordinate direction, so the analysis of respiratory movement is not sufficient

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