A Shadow Shield Whole-Body Counter

A suitability study of the fission product phantom and the bottle manikin absorption phantom for calibration of in vivo bioassay equipment for the DOELAP accreditation testing program

“…As part of this assistance, PNL performed a study to evaluate two candidate calibration phantoms to be used in DOELAP testing. Part of this work also entailed comparing in vivo detector calibration response of the phantoms with known human calibration factors determined in a previous study, thereby providing a measure of the accuracy of the phantoms' response (Palmer and Roesch 1965). These two commercially available, anthropomorphic calibration phantoms were specifically designed for use with radionuclides that distribute evenly throughout the soft tissues of the body.…”

“…The shadow shield whole body counter is designed to be a low-background, transportable, and economical counter (Palmer and Roesch 1965). The shielding is placed in such a manner that a "shadow" is cast over the detector's sensitive area so that only scattered photons from non-subject areas reach the detector.…”

In Vivo Monitoring Program Manual, PNL-MA-574

“…This whole-body counter is designed (Palmer and Roesch 1965) to provide sensitive and accurate measurements of radionuclides in the body that emit photons with energies greater than 200 keV. The annular lead rings surround all but one side of the NaI detector, effectively collimating the field of view of the detector.…”

“…Shadow shield whole body counters can provide sensitive and accurate measurements of radionuclides that emit gamma rays with energies higher than 200 keV in the body (Palmer and Roesch 1965). A horizontal shadow-shield counter and a vertical shadow-shield counter are located in the mobile counting trailer that can be transported to different locations.…”

A New Method for Calculating the Distribution of Radioactivity in Man Measured With A Whole-body Counter

“…1 ) (Watts et al 1972; Rab Molla and Simpson 1967;Palmer and Roesh 1965 ). The equipment was designed at the Department of Health Physics at the Regional Hospital of Varese (Conte et al 1978).…”