Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1979-08-08
1981-09-29
Willis, Davis L.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250445T, G01T 120
Patent
active
042925380
ABSTRACT:
A radiation detector or detector array which has a non-constant spatial response, is disclosed individually and in combination with a tomographic scanner. The detector has a first dimension which is oriented parallel to the plane of the scan circle in the scanner. Along the first dimension, the detector is most responsive to radiation received along a centered segment of the dimension and less responsive to radiation received along edge segments. This non-constant spatial response can be achieved in a detector comprised of a scintillation crystal and a photoelectric transducer. The scintillation crystal in one embodiment is composed of three crystals arranged in layers, with the center crystal having the greatest light conversion efficiency. In another embodiment, the crystal is covered with a reflective substance around the center segment and a less reflective substance around the remainder. In another embodiment, an optical coupling which transmits light from adjacent the center segment with the greatest intensity couples the scintillation crystal and the photoelectric transducer. In yet another embodiment, the photoelectric transducer comprises three photodiodes, one receiving light produced adjacent the central segment and the other two receiving light produced adjacent the edge segments. The outputs of the three photodiodes are combined with a differential amplifier.
REFERENCES:
patent: 3225193 (1965-12-01), Hilton et al.
patent: 3399302 (1968-08-01), Carrell
patent: 3793520 (1974-02-01), Grenier
patent: 3944833 (1976-03-01), Hounsfield
patent: 4037105 (1977-07-01), Laurer
patent: 4039839 (1977-08-01), Carlier
patent: 4070581 (1978-01-01), Gibbons et al.
patent: 4145610 (1979-03-01), Perilhou
patent: 4159424 (1979-06-01), Kingsley
patent: 4180737 (1979-12-01), Kingsley
Glover et al., "Theoretical Resolution of Computed Tomography Systems", Journal of Computer Assisted Tomography, vol. 3, No. 1, Feb. 1979.
Technicare Corporation
Willis Davis L.
LandOfFree
Shaped detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shaped detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shaped detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1235740