Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1976-12-06
1978-03-28
Willis, Davis L.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250363R, 250369, 250393, G01T 120
Patent
active
040816826
ABSTRACT:
A method and apparatus for accurately locating and roughly identifying a radioactive uranium and/or transuranium isotope deposited in a wound, by monitoring alpha radiation in the edge region of the wound and at the wound surface to determine whether surface contamination is present, monitoring low-energy X-ray or gamma radiation at the wound to determine the presence of a low-energy X-ray or gamma radiation source, measuring the low-energy X-ray or gamma radiation in the wound by means of a succession of detectors having progressively increasing local resolution and progressively decreasing limitation of the detectable volume to effect coarse and then fine localization of even small isotope deposits. An isotope can be roughly identified by displaying the measuring result produced by at least one of the detectors as a pulse amplitude spectrum, and comparing the displayed result with subsequently measured spectra of predetermined isotopes.
REFERENCES:
A Miniaturized Probe for Detecting Radioactivity at Thyroid Surgery, Morris et al., Phys. Med. Biol., 1971, vol. 16, No. 3, pp. 397-404.
Avalanche Detector Arrays for In Vivo Measurement of Plutonium and Other Low Activity, Low Energy Emitter, IEEE Trans. Nucl. Sci. 19 (1972), No. 1.
Fromhein Olaf
Ohlenschlager Lothar
Rapp Wilhelm
Gesellschaft fur Kernforschung m.b.H.
Willis Davis L.
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