Patent ID: 9645213
Date: 2017-05-09
CPC Classifications: A61B,G01R

Claim:
1. A device combining magnetic resonance imaging (MRI) and positron emission tomography (PET) for a breast examination, comprises: an air pressure source; a servo flow control module including a servo flow control valve for receiving gas from the air pressure source, a microcomputer for controlling the servo flow control valve, and an analog-digital/digital-analog (AD/DA) interface card for receiving signals from the microcomputer; a pedestal disposed under a hole of a breast MRI bed and provided with a bearing platform mounted in a sliding way for bearing a PET scanner ring thereon, wherein the hole is provided for accommodating breasts; a counterweight unit connecting the PET scanner ring for decreasing loading weight and friction thereof, wherein a non-metallic and non-magnetic pneumatic actuator disposed on the pedestal and connected with the servo flow control module by a barometric pipe, wherein the non-metallic and non-magnetic pneumatic actuator includes a piston rod, and the piston rod is disposed in a corresponding space below the hole; and a movable pulley provided with a first nylon rope connecting to the bearing platform at one end thereof and connecting to a second counterweight fixed on the pedestal at the other end thereof, wherein the bearing platform connects to a displacement measurement unit depart from a magnetic environment of MRI by a second nylon rope, the second nylon rope coils round an idle wheel provided on the pedestal between the bearing platform and the displacement measurement unit, and the displacement measurement unit receives a location information of the bearing platform and transmits the location information to the servo flow control module for controlling an opening of the servo flow control valve to change gas flow entering into the non-metallic and non-magnetic pneumatic actuator, so that the movable pulley and the first and second nylon ropes can be driven to allow the bearing platform to move up and down under the hole.