Height compensation system for patient table
A height compensation system for a patient table, including: a light reflection block, which is disposed on a gantry side of a medical device, and is configured to reflect a received optical signal; a photoelectric detector, which is disposed on the patient table opposite to the light reflection block, and is configured to emit an optical signal outward and detect a reflected signal of the optical signal; and a controller, which is communicably connected to the photoelectric detector, and configured to control, when the photoelectric detector detects a reflected signal reflected by the light reflection block, the patient table to move upward in a vertical direction until the photoelectric detector does not detect the reflected signal reflected by the light reflection block.
1 . A height compensation system for a patient table, controlling a relative position between a patient table and a gantry of a medical device, the height compensation system comprising:
a light reflection block, which is disposed on a gantry side of the medical device or a patient table side, and is configured to reflect a received optical signal;
a photoelectric detector, which is disposed on the gantry side or the patient table side opposite to the light reflection block, and is configured to emit an optical signal outward and detect a reflected signal of the optical signal; and
a controller, which is communicably connected to the photoelectric detector, and is configured to control, when the photoelectric detector detects a reflected signal reflected by the light reflection block, the patient table to move upward in a vertical direction until the photoelectric detector does not detect the reflected signal reflected by the light reflection block.
2 . The height compensation system according to claim 1 , wherein the light reflection block is disposed on the gantry side of the medical device, and the photoelectric detector is disposed on the patient table side opposite to the light reflection block.
3 . The height compensation system according to claim 1 , wherein the light reflection block is disposed on the patient table side, and the photoelectric detector is disposed on the gantry side of the medical device.
4 . The height compensation system according to claim 1 , further comprising:
a height sensor, which is configured to detect height compensation information of a vertical height of the patient table from a base of the medical device relative to a reference height,
wherein the controller is communicably connected to the height sensor and is further configured to determine, according to the height compensation information when the photoelectric detector does not detect the reflected signal reflected by the light reflection block, whether to control the patient table to move in the vertical direction.
5 . The height compensation system according to claim 4 , wherein the controller determining, according to the height compensation information, whether to control the patient table to move in the vertical direction comprises:
controlling, when the height compensation information is greater than or equal to a predetermined value, the patient table to move downward in the vertical direction until the photoelectric detector detects the reflected signal reflected by the light reflection block; and
maintaining a horizontal height of the patient table in the vertical direction when the height compensation information is less than the predetermined value.
6 . The height compensation system according to claim 4 , further comprising:
a motor, which is disposed in the base, and is configured to drive the patient table to move upward or downward in the vertical direction,
wherein the height sensor comprises at least one Hall sensor disposed in the motor, and a phase difference between Hall signals generated by the at least one Hall sensor is 120°.
7 . The height compensation system according to claim 1 , wherein:
the light reflection block is disposed on a lower-side outer surface of an entrance of the gantry of the medical device, and an upper edge of the light reflection block is aligned with an upper surface of a bracket that is in the gantry of the medical device and that is configured to support the patient table, and
the photoelectric detector is configured to emit an optical signal toward the entrance of the gantry of the medical device and detect a reflected signal of the optical signal.
8 . The height compensation system according to claim 1 , wherein:
the photoelectric detector is disposed on a lower-side outer surface of an entrance of the gantry of the medical device, an upper edge of the photoelectric detector is aligned with an upper surface of a bracket that is in the gantry of the medical device and that is configured to support the patient table, and the photoelectric detector is configured to emit an optical signal in a direction opposite a direction of the entrance of the gantry of the medical device and detect a reflected signal of the optical signal, and
the light reflection block and the photoelectric detector are disposed on the patient table side opposite to each other.