Abstract: Systems, devices, and methods are presented for automatic tuning, calibration, and verification of radiation therapy systems comprising control elements configured to control parameters of the radiation therapy systems based on images obtained using electronic portal imaging devices (EPIDs) included in the radiation therapy system.

Abstract: Systems, devices, and methods for automatic tuning, calibration, and verification of radiation therapy systems based on images obtained using electronic portal imaging devices (EPIDs).

Abstract: A couch top includes a top, a base, a universal joint coupling the top and the base, and actuators mounted on the base to pitch and roll the top. Feedback devices may be fitted on the rotating ends of the universal joint to provide feedback for a control loop. Each actuator has an actuated end that translates vertically to lift or lower the top. The vertical movement may be derived from a carriage riding in place on a translating inclined plane. When the actuated ends move in the same direction, they pitch the top. When the actuated ends move in the opposite directions, they roll the top. Feedback devices may be fitted on motors in the actuators to provide feedback for the control loop.

Abstract: A method of homing motion axes in a radiation system uses a motor and one or more hardstops. A load is driven by a motor to move toward a hardstop during which an electrical parameter of the motor is monitored. A reference position for the motion axis is defined when the monitored electrical parameter reaches or exceeds a determined value. Alternative to monitoring the motor electrical parameter, the motor velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored motor velocity falls to or below a determined value. Alternatively, the load velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored load velocity falls to or below a determined value.

Abstract: A couch top includes a top, a base, a universal joint coupling the top and the base, and actuators mounted on the base to pitch and roll the top. Feedback devices may be fitted on the rotating ends of the universal joint to provide feedback for a control loop. Each actuator has an actuated end that translates vertically to lift or lower the top. The vertical movement may be derived from a carriage riding in place on a translating inclined plane. When the actuated ends move in the same direction, they pitch the top. When the actuated ends move in the opposite directions, they roll the top. Feedback devices may be fitted on motors in the actuators to provide feedback for the control loop.

Abstract: In a method of detecting the health of a motion axis in a radiation system including a motor operable to move a load between a first end and a second end, data on an electrical parameter of the motor is collected as the motor moves in the certain range. At least one indicator of the electrical parameter including a maximum, a minimum, an average, and a standard deviation of the electrical parameter is determined and compared with a provided value or range of values indicative of the health of the axis. The health of the motion axis is determined using the comparison of the at least one indicator and the provided value or range of values.

Abstract: A patient support system includes a base having a plurality of wheels, and a patient support coupled to the base, wherein at least a part of the patient support is for supporting a head of a patient, and at least one of the wheels has a plurality of secondary wheels. A patient support system includes a patient support, a transportation mechanism for transporting the patient support, a positioner for moving the patient support relative to the transportation mechanism, and a positioning system for determining an actual position associated with the patient support with respect to a multi-dimensional coordinate system, wherein one of the transportation mechanism and the positioner is for coarse positioning of the patient support, and another one of the transportation mechanism and the positioner is for fine positioning of the patient support.

Abstract: A method of homing motion axes in a radiation system uses a motor and one or more hardstops. A load is driven by a motor to move toward a hardstop during which an electrical parameter of the motor is monitored. A reference position for the motion axis is defined when the monitored electrical parameter reaches or exceeds a determined value. Alternative to monitoring the motor electrical parameter, the motor velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored motor velocity falls to or below a determined value. Alternatively, the load velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored load velocity falls to or below a determined value.

Abstract: A wafer handling apparatus having input and output robotic systems directed by a programmed controller. Each system has components including a robot, a twist and rotate, and a carrier and automated carrier rail. The input system is for removing wafers from their wafer pod, placing them in the carrier and transporting them via the rail to a wafer processing area. The output system performs the reverse operation, taking wafers from a carrier following processing and placing them in a pod. Each robot includes a plurality of interconnected, articulated cantilevered arms. The last one of the arms has a wand on one end and a laser emitter detector on the other end, and operates in cooperation with the controller to provide location detection of system components. The controller also includes circuitry for sensing contact of the wand with an object by measuring the increased robot motor torque occurring upon contact.

Abstract: Briefly, a preferred embodiment of the present invention includes a wafer carrier buffer for storage of a plurality of carriers containing wafers either waiting to be taken for processing in an adjacent wafer processing system, or waiting to be taken from the buffer following the processing. The buffer has a sliding carrier first input apparatus for taking a carrier from outside the buffer through a buffer input door and into the buffer interior. A buffer controller is included for directing robotic apparatus to take the carrier from the input apparatus and place it on a selected one of a plurality of carrier storage locations, and from a carrier storage location to a first output for delivery of wafers to processing. The robotic apparatus also delivers an empty carrier to a second input apparatus for receiving wafers from the processing area, and for delivery of a carrier with processed wafers to a second sliding output apparatus for removal from the buffer through a buffer output door.

Abstract: A method and apparatus for automatically calibrating the precise positioning of a wafer handling robot relative to a target structure is disclosed. The apparatus comprises a machine controller connected to robot having an end-effector with three degrees of movement. The controller has a memory with stored rough distance and geometrical data defining the general location of structural features of the target structure. The robot is programmed to move toward the target structure in a series of sequential movements, each movement culminating with the robot end-effector touching a preselected exterior feature of the target structure. Each touching of the end-effector is sensed and provides data for the controller which then calculates the precise location of the target structure. The data accumulated during a series of touching steps by the robot end-effector is utilized by the controller to provide a precise calibrated control program for future operation of the robot.