Detector and localizer for low energy radiation emissions

Details Detector and localizer for low energy radiation emissions Detector and localizer for low energy radiation emissions

G - Physics

01

T

326/12

G01T 1/161 (2006.01) H03F 3/193 (2006.01)

Patent

CA 1329418

DETECTOR AND LOCALIZER FOR LOW ENERGY RADIATION EMISSIONS ABSTRACT OF THE DISCLOSURE A detector particularly suited for use in immuno-guided surgery capable of detecting very faint gamma emissions and thereby localizing cancerous tumor. The detector employs a hand manipular probe within which is contained a crystal such as cadmium telluride which is secured in a light tight compressively restrained environment employing compliant yet conductive components which also serve to exhibit varying accoustical impedance to impinging microphonic effects. A preamplifier is incorporated within the probe device itself which employs an integrator stage front end combining a field effect transistor and bipolar device with a very small feedback capacitance of less than one picofarad. A bootstrap technique is utilized to enhance the amplification of the bipolar amplification stage. Pulse related signals outputted from the device are normalized and compared to produce pulse data which are analyzed. In one mode of operation a siren effect is employed to guide the surgeon towards emission sources. -62-

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