Low-energy multihole converging collimator compared with a pinhole collimator

Journal Article · Fri Feb 01 04:00:00 EDT 1974 · J. Nucl. Med., v. 15, no. 2, pp. 59-64

OSTI ID:4348195

Moyer, R A

It is apparent from the equations describing the performance of the pinhole and converging collimators on the scintillation camera that the sensitivity, resolution, and field of view of these two collimators are very different as a function of distance from the collimator face. A 6000-hole converging collimator designed for /sup 99m/Tc havin a 15-cm field of view diameter at 10 cm from the collimator face was constructed and compared with the Searle Radiographicas pinhole collimator. The sensitivity of the converging collimator increases with depth while that of the pinhole collimator decreases. The resolution of the collimator-camera system degrades more rapidly with depth fur the pinhole collamator. The field of view of the converging collimator decreases with increasing object-tocollimator distances while that of the pinhole collimator increase with depth. The experimental results agree with the derived equations and imply that the converging collimator has very different performance characteristics from the pinhole collimator and that it should be useful in the imaging of small organs. (auth)

• Research Organization: Searle Radiographics Inc., Des Plaines, IL
• NSA Number: NSA-29-020970
• OSTI ID: 4348195
• Journal Information: J. Nucl. Med., v. 15, no. 2, pp. 59-64, Journal Name: J. Nucl. Med., v. 15, no. 2, pp. 59-64; ISSN JNMEA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*COLLIMATORS-- PERFORMANCE
*GAMMA CAMERAS-- COLLIMATORS
N46110* --Instrumentation--Radiation Detection Instruments-- General Detectors & Monitors
N48830 --Life Sciences--New Tracer Techniques--Other
SENSITIVITY
SPATIAL RESOLUTION
TECHNETIUM 99