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US 4,585,941 AGranted
Dosimetry system for strontium-rubidium infusion pump
AssigneeE. R. Squibb & Sons, Inc.
InventorBrian C. Bergner
Life of this patent
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Abstract
The dosimetry system used with a strontium-rubidium infusion system is a very high speed circuit capable of measuring the radioactive dosage infused into a patient in real time. The dosimetry system is capable of receiving very short duration input pulses generated by a photomultiplier tube in response to the presence of radioactivity.
Claims7
A dosimetry system for a strontium-rubidium generator comprising:
- (a) a photomultiplier tube, having a face through which input signals in the form of light are received;
- (b) a plastic scintillator mounted on said face;
- (c) means for reflecting back into said tube any light which scintillates from the plastic scintillator;
- (d) means for preventing stray light from striking said plastic scintillator;
- and
- (e) a single channel analyzer electrically connected to said photomultipler tube for receiving pulses from said photomultiplier tube, said single channel analyzer comprising a very high speed comparator which receives input pulses from said photomultipler tube including means for analyzing input pulses having pulse widths of significantly less than 50 nanoseconds.
3 more elements
Dependencies are inferred from the claim text.