X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Patent
1997-01-10
1998-04-21
Wong, Don
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
378146, H05G 164
Patent
active
057426600
ABSTRACT:
A multiple x-ray energy level imaging system includes a scanning x-ray beam and two detector design having a first low x-ray energy sensitive detector and a second high x-ray energy sensitive detector. The low x-ray energy detector is placed next to or in front of the high x-ray energy detector. The low energy sensitive detector has small stopping power for x-rays. The lower energy x-rays are absorbed and converted into electrical signals while the majority of the higher energy x-rays pass through undetected. The high energy sensitive detector has a large stopping power for x-rays as well as it having a filter placed between it and the object to absorb the lower energy x-rays. In a second embodiment; a single energy sensitive detector is provided which provides an output signal proportional to the amount of energy in each individual x-ray it absorbed. It can then have an electronic threshold or thresholds set to select two or more energy ranges for the images. By having multiple detectors located at different positions, a dual energy laminography system is possible.
REFERENCES:
patent: 4972900 (1990-11-01), Sones et al.
patent: 4979201 (1990-12-01), Kruger
Majewski Stanislaw
Wojcik Randolph F.
Southeastern Universities Research Association, Inc.
Wong Don
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