A system and method for compensating for torque reaction forces in a medical apparatus is disclosed. The system may include a rotary element which rotates about an axis. A contra-rotating flywheel may be driven to rotate about the axis relative to the rotary element, wherein the flywheel is free to rotate and is accelerated and decelerated by a driver which is fixed to the rotary element. Contra-rotation of the flywheel may compensate for torque reaction forces when the rotary element is accelerated or decelerated.

A system and method for compensating for torque reaction forces in a medical apparatus is disclosed. The system may include a rotary element which rotates about an axis. A contra-rotating flywheel may be driven to rotate about the axis relative to the rotary element, wherein the flywheel is free to rotate and is accelerated and decelerated by a driver which is fixed to the rotary element. Contra-rotation of the flywheel may compensate for torque reaction forces when the rotary element is accelerated or decelerated.

An applicator for delivery of radiotherapy seeds to a tumor of a patient through an elongate needle (104). The elongate needle comprises a needle handle (204) and a needle tube having a given length for insertion into the patient. The applicator comprises an elongate applicator tube (106) designed to pass through the elongate needle, wherein the elongate applicator tube defines an internal channel which receives one or more radiotherapy seeds (110), an applicator handle (210) configured to be attached to the needle handle (204); and a stylet (108) within the elongate applicator tube. The elongate applicator tube is longer than the elongate needle.

A wireless optogenetic device in proximity to a neural cell of a subject includes a body configured to hold light transducing materials arranged to up-convert electromagnetic radiation in infrared or near-infrared spectrum into light in the visible spectrum to affect activity of the neural cell. The body allows electromagnetic radiation in infrared or near-infrared to reach the light transducing materials. A radiation system includes a radiation probe for irradiating a wireless optogenetic device with electromagnetic radiation in infrared or near-infrared spectrum from a radiation source. The system further includes a movement mechanism for moving the radiation probe, a detector for detecting a location of the wireless optogenetic device, and a controller for controlling the movement mechanism based on the detected location of the wireless optogenetic device such that the radiation probe is arranged to irradiate the wireless optogenetic device at the detected location with the electromagnetic radiation.

A wireless optogenetic device in proximity to a neural cell of a subject includes a body configured to hold light transducing materials arranged to up-convert electromagnetic radiation in infrared or near-infrared spectrum into light in the visible spectrum to affect activity of the neural cell. The body allows electromagnetic radiation in infrared or near-infrared to reach the light transducing materials. A radiation system includes a radiation probe for irradiating a wireless optogenetic device with electromagnetic radiation in infrared or near-infrared spectrum from a radiation source. The system further includes a movement mechanism for moving the radiation probe, a detector for detecting a location of the wireless optogenetic device, and a controller for controlling the movement mechanism based on the detected location of the wireless optogenetic device such that the radiation probe is arranged to irradiate the wireless optogenetic device at the detected location with the electromagnetic radiation.

An irradiation treatment planning method constituted of: controlling a patient support member to rotate about a first axis by an initial rotation angle; imaging the patient; receiving treatment prescriptions; and responsive to the patient image, the treatment prescriptions and allowable ranges of rotation about at least two orthogonal axes, determining an irradiation treatment plan, wherein in the event that the irradiation treatment plan does not meet the treatment prescriptions, the method further comprises: responsive to the patient image, the treatment prescriptions and the allowable rotation ranges, determining rotation angles of the patient support member about the first axis; for each rotation angle, controlling the patient support member to rotate about the first axis by the rotation angle and imaging the patient; and for each rotation angle, determining an irradiation treatment plan portion responsive to the patient image, the treatment prescriptions and the allowable rotation ranges.

An irradiation treatment planning method constituted of: controlling a patient support member to rotate about a first axis by an initial rotation angle; imaging the patient; receiving treatment prescriptions; and responsive to the patient image, the treatment prescriptions and allowable ranges of rotation about at least two orthogonal axes, determining an irradiation treatment plan, wherein in the event that the irradiation treatment plan does not meet the treatment prescriptions, the method further comprises: responsive to the patient image, the treatment prescriptions and the allowable rotation ranges, determining rotation angles of the patient support member about the first axis; for each rotation angle, controlling the patient support member to rotate about the first axis by the rotation angle and imaging the patient; and for each rotation angle, determining an irradiation treatment plan portion responsive to the patient image, the treatment prescriptions and the allowable rotation ranges.

The present invention provides a focused radiotherapy apparatus comprising: at least one source part, provided with a plurality of radioactive sources arranged thereon; at least one collimation part enclosing the source part, and comprising a plurality of collimators aligned corresponding to the radioactive sources, the radiation rays emitted by the plurality of radioactive sources passing through the collimators and then converging to a focal point for treatment.

The present invention provides a focused radiotherapy apparatus comprising: at least one source part, provided with a plurality of radioactive sources arranged thereon; at least one collimation part enclosing the source part, and comprising a plurality of collimators aligned corresponding to the radioactive sources, the radiation rays emitted by the plurality of radioactive sources passing through the collimators and then converging to a focal point for treatment.

A radiotherapy apparatus includes a rotatable drum on which is mounted a gantry arm carrying a radiation source. The arm extending from the drum to a location of the radiation source is offset from the axis of rotation of the drum and oriented towards the axis. The radiotherapy apparatus further includes a mechanism configured to apply a tilt to the arm at one or more rotational orientations of the drum. The rotatable drum is supported on wheels beneath the drum, and the mechanism is an eccentric mechanism within the wheels and is configured to apply the tilt to the arm via the wheels.