High-resolution digital x-ray detector utilizing a discrete array of CdWO/sub 4/ scintillators and a self-scanned photodiode array
A high-resolution x-ray detector array for x-ray imaging is described. It consists of a discrete array of CdWO/sub 4/ scintillators and a Reticon 1024S photodiode array with a fiber-optic faceplate. The scintillator elements measure 0.099 x 3 x 4 mm and are bonded together with aluminum foil separators to minimize light crossover. Detective quantum efficiency (DQE) of individual detector channels was 0.38. Systematic variations between channels were substantial. With only a simple correction for between channel variations, DQE for the entire array was 0.04. Evaluation of the edge response function of the array showed that resolution is similar to a detector whose line spread function is Gaussian with a standard deviation of 0.172 mm.
- Research Organization:
- University of Maryland Medical System/Hospital, Department of Diagnostic Radiology, Baltimore, Maryland 21201
- OSTI ID:
- 6718375
- Journal Information:
- Med. Phys.; (United States), Vol. 14:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BIOMEDICAL RADIOGRAPHY
X-RAY RADIOGRAPHY
SCINTILLATOR-PHOTODIODE DETECTORS
DIAGNOSTIC TECHNIQUES
RESOLUTION
X-RAY EQUIPMENT
EQUIPMENT
INDUSTRIAL RADIOGRAPHY
MEASURING INSTRUMENTS
MEDICINE
NUCLEAR MEDICINE
RADIATION DETECTORS
RADIOLOGY
SCINTILLATION COUNTERS
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments