Abstract: Systems for locating implanted in vivo sensors systems adapted for use with an external beam radiation therapy delivery source include: (a) an external solenoid member; (b) an articulated arm opertively associated with the external solenoid member, wherein, in operation, the articulated arm is configured to translate the solenoid; (c) a controller configured to direct the movement of the articulated arm, the controller being in communication with the power source configured to power the external solenoid; (d) at least one implantable sensors unit, wherein the at least one implantable sensor unit is configured to sense at least one predetermined parameter of interest in vivo, and wherein the at least one implantable sensor unit comprises a solenoid, and wherein, in operation, the sensor unit solenoid corporates with the external solenoid to generate a magnetic coupling signal having a signal strength that varies based on the possession of the external solenoid member relative to the implanted sensors unit; (e)

Abstract: Methods, systems, devices, and computer program products include positioning single-use radiation sensor patches that have adhesive onto the skin of a patient to evaluate the radiation dose delivered during a medical procedure or treatment session. The sensor patches are configured to be relatively unobtrusive and operate during radiation without the use of externally extending power cords or lead wires.

Abstract: Methods, systems, devices, and computer program products include positioning single-use radiation internal dosimeters with MOSFETs into a patient to evaluate the radiation dose delivered during a medical procedure or treatment session. The MOSFETs can be unpowered during irradiation.

Abstract: A series/parallel resonant converter includes a resonant control circuit 1 that outputs a pair of alternately high gate drive signals G.sub.1, G.sub.2 ; switches in the form of isolated gate bipolar transistors (IGBTs) Q.sub.1, Q.sub.2 ; diodes D.sub.1, D.sub.2 ; a pair of resonant capacitors C.sub.R ; a series resonant inductor L.sub.RS ; a load 2; a zero current detector 4; a bus 6, 6'; and a parallel resonant inductor L.sub.RP in parallel with the load. The input line current and voltage are converted into an alternating current I.sub.LOAD and voltage V.sub.LOAD for driving the load 2. The load 2 may include a transformer T.sub.1, half bridge rectifier, capacitor, and PWM inverter.

Abstract: A gate-drive circuit (10) is an interface between a clock (12) and control circuit (14) and a circuit (16) comprising an isolated gate bipolar transistor (IGBT) devices. The clock (12) provides two complementary clock signals (CLK1, CLK2) to the gate-drive circuit (10); the control circuit provides a signal (ENABLE) for turning the gate-drive circuit on and off, and the gate-drive circuit outputs isolated supply voltages (+RAIL, -RAIL), a drive signal (GATE), and a common reference signal (EMITTER). The control signal is sent across an isolation boundary via a 2-MHz push-pull converter in the gate-drive circuit (10). A transformer (T1) in the gate-drive circuit provides the isolation boundary. The power required to switch the IGBT device (16) is sent through the same 2-MHz converter. The secondary of the 2-MHz push-pull transformer (T1) is referenced to the IGBT emitter.