Granted Patent B2

US 12,201,850 · App. 17/842,674 · Granted Jan 21, 2025

Inventors: William E. Simon (Satellite Beach, FL); Jakub Kozelka (Melbourne, FL); Jeffrey L. Hildreth (Melbourne, FL); Andreas A. Schönfeld (Wendeburg, DE); Myron Brookshire (Melbourne, FL)

Assignee: Sun Nuclear Corporation

A61N5/1031A61N5/1048A61N5/1071A61N5/1075G01T1/247A61N2005/1074

Abstract

Claims (18)

1. A system for quality assurance of high dose rate radiation therapy, the system comprising:

a radiation delivery system configured to deliver high dose rate radiation therapy, the radiation delivery system including a radiation source and a collimating system; and

a radiation detection system comprising:

a diode to measure high dose rate radiation from the radiation source;

an operational amplifier to transform an output of the diode to a measurable voltage; and

a voltage source configured to apply a reverse bias to a component of the radiation detection system.

2. The system of claim 1 , wherein the radiation delivery system is configured to deliver an instantaneous dose rate in the range of 2×10 4 Gy/s to 1×10 7 Gy/s.

3. The system of claim 1 , wherein the reverse bias reduces a loss of sensitivity of the radiation detection system when measuring the high dose rate radiation.

4. The system of claim 3 , wherein the reverse bias keeps the loss of sensitivity of the radiation detection system to no more than 2%.

5. The system of claim 1 , wherein the high dose rate radiation creates a forward bias that reduces the sensitivity of the radiation detection system and the voltage source applies the reverse bias to remove at least 95% of the forward bias.

6. The system of claim 1 , wherein the voltage source is applied to a noninverting input of the amplifier.

7. The system of claim 6 , wherein the voltage source produces a voltage bias across inputs of the amplifier that is maintained by an output of the amplifier via a feedback capacitor.

8. The system of claim 1 , further comprising a capacitor connected in parallel to the diode, thereby reducing a forward bias of the diode.

9. The system of claim 1 , wherein the radiation detection system further comprises an input resistor between the diode and the operational amplifier.

10. The system of claim 1 , wherein the voltage source is configured to apply up to 10.0 V to form the reverse bias.

11. A system for quality assurance of high dose rate radiation therapy delivery from a radiation source, the system comprising:

a diode to measure high dose rate radiation from the radiation source; and

a radiation detection system including an amplifier to transform the output of the diode to a measurable voltage, wherein the amplifier is configured to have an inherent bias that effectively reverse biases the radiation detection system.

Assignments (1)

Continuity (1)

References Cited (400)