Supporting device for scanning and operation mechanism of supporting device

Abstract

The invention provides a supporting device for scanning and an operation mechanism of the supporting device. The supporting device for scanning comprises a bed board and a bed frame, the operation mechanism comprises a driving device and a supporting structure which is used for supporting the bed board, the bed board and the supporting structure can move synchronously or relatively, the driving device comprises a power source, a first screw, a second screw and a synchronous control part, the first screw is driven by the power source to rotate and matched with the bed board in a threaded mode to drive the bed board to move, the second screw is matched with the supporting structure in a threaded mode to drive the supporting structure to move, and the synchronous control part is used for controlling the second screw to be connected with the power source to rotate synchronously with the first screw or be separated from the power source. According to the operation mechanism, a power source which drives the supporting structure to move is dependent on the power source which drives the scanning bed board, and no independent power source is required, so that the cost is low; and when the supporting structure and the scanning bed board move synchronously, the supporting structure and the scanning bed board are controlled by the same power source, so that the speed of the supporting structure and the speed of the scanning bed board are not required to be coordinated and controlled, the synchronism of movement of the supporting structure and movement of the scanning bed board can be guaranteed, and the electric device control is correspondingly simplified.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a supporting device for scanning and an operating mechanism thereof. Background technique [0002] The support device for scanning is mainly used to support the person to be scanned. During scanning, the person to be scanned lies on the support device and is sent into the scanning device. The current scanning equipment does not perform a single scan. Taking the PET / CT scanning bed as an example, the person who enters the scanning equipment undergoes a CT scan first, and then a PET scan. The final scan image is formed by combining the two scan images. , for analysis. [0003] Therefore, the supporting device for scanning needs to have the most basic two functions: [0004] 1. Be able to support the scanned person to complete the scanning movement; [0005] 2. Ensure that the amount of deformation reflected in the CT scanning field of view and the PET scanning field of v...

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Problems solved by technology

[0006] The reason for the second function is that PET and CT images need to be synthesized. For example, the A position in the CT image reflects the part a of the scanned person. After it is sent into the PET scanning field of view according to a predetermined distance, the A position in the PET image should also reflect If the deformation of the scanning bed is different from that in the CT scan field of view, the A position in the PET image may reflect the part b, resulting in distortion of the composite image or failure to synthesize it.

[0014] First, the switching bed and the scanning bed as the supporting structure are driven by two sets of driving devices, which require two power sources, and the cost is high; in addition, when the switching bed and the scanning bed move synchronously, the two sets of driving devices need to ensure the synchronization of the drive , electrical control is more troublesome

[0015] Second, the upper and lower double-layer guide rails are generally installed to guide the movement of the scanning bed board and the switching bed board respectively. The mechanical cost is high, and the requirements for the fit of the two guide rails are high. The low fit will easily lead to inconsistent force on the bed board during the movement. , the amount of deformation changes, resulting in inaccurate scanned images

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