Device for determining the spatial absorption distribution in a

Details Device for determining the spatial absorption distribution in a Device for determining the spatial absorption distribution in a

1979-05-09

1981-08-25

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250511, G01T 120, G21F 504

Patent

active

042861560

ABSTRACT:
The device in accordance with the invention comprises detectors, a first part of which is not struck by radiation during measurement of the useful signal, whilst a second part which is struck directly by the radiation during the measurement of the useful radiation, is shielded during a next measurement. During the last measurement, the first detector part is struck by scattered radiation. From the two signals thus formed, a signal free from scattered radiation can be obtained by subtraction.

REFERENCES:
patent: 3585387 (1971-06-01), Bramlet
patent: 3840747 (1974-10-01), Macovski
patent: 4052618 (1977-10-01), Hounsfield
patent: 4057725 (1977-11-01), Wagner
patent: 4081681 (1978-03-01), Froggatt
patent: 4143273 (1979-03-01), Richey et al.

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