CPC G01T 1/248 (2013.01) [A61B 6/032 (2013.01); G01T 1/1603 (2013.01)] | 23 Claims |
1. A radiation detector, comprising:
an avalanche photodiode (APD) with a first side coupled to an electrode and configured to work in a linear mode;
a current sourcing module configured to compensate for a leakage current in the APD and comprising a current source and a modulator;
wherein the current source is configured to output a first electrical current and a second electrical current;
wherein the modulator is configured to control a ratio of a duration at which the current source outputs the first electrical current to a duration at which the current source outputs the second electrical current.
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