Radiation camera exposure control

Patent · Tue Sep 28 04:00:00 EDT 1976

OSTI ID:7334141

Martone, R J; Yarsawich, M; Wolczek, W

A system and method for governing the exposure of an image generated by a radiation camera to an image sensing camera is disclosed. The exposure is terminated in response to the accumulation of a predetermined quantity of radiation, defining a radiation density, occurring in a predetermined area. An index is produced which represents the value of that quantity of radiation whose accumulation causes the exposure termination. The value of the predetermined radiation quantity represented by the index is sensed so that the radiation camera image intensity can be calibrated to compensate for changes in exposure amounts due to desired variations in radiation density of the exposure, to maintain the detectability of the image by the image sensing camera notwithstanding such variations. Provision is also made for calibrating the image intensity in accordance with the sensitivity of the image sensing camera, and for locating the index for maintaining its detectability and causing the proper centering of the radiation camera image.

• Assignee: Picker Corp.
• Patent Number(s): US 3983394
• OSTI ID: 7334141
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
CAMERA TUBES
CAMERAS
CONTROL SYSTEMS
COUNTING TECHNIQUES
DESIGN
DOSES
GAMMA CAMERAS
IMAGE TUBES
RADIATION DOSES
RADIOISOTOPE SCANNING