Whole-body counter for clinical practice and radiation protection

Conference · Wed Jan 01 04:00:00 EST 1975

OSTI ID:4163880

Werner, E; Morsy, S M

It is important to measure the total activity most accurately when using a whole-body counter. In the whole-body counters described so far with detector arrangement of NaI(Tl) crystals, deviations of at least a factor of two occur for point sources of the same activity in the centre of the body or on the surface. To reduce these differences in susceptibility, a measuring device with 4 detectors was designed in which outer body sections are partially shielded as opposed to the body centre point. The shielding is achieved by a collimator system with rectangular opening and by a particular arrangement of the crystals in the collimators. A uniform susceptibility in a longitudinal direction can be achieved by moving the patient's bed through the detector arrangement. The designed system has a simple construction and guarantees a homogeneous susceptibility over the total body cross-section with deviations of less than 20% of the value at the centre of the body. (ORU/LH)

• Research Organization: Gesellschaft fuer Strahlen- und Umweltforschung m.b.H., Frankfurt am Main (F.R. Germany). Abt. fuer Biophysikalische Strahlenforschung
• NSA Number: NSA-33-007358
• OSTI ID: 4163880
• Report Number(s): AED-CONF--75-141-009
• Country of Publication: Germany
• Language: German

Related Subjects

*WHOLE-BODY COUNTERS-- OPTIMIZATION
*WHOLE-BODY COUNTING-- GEOMETRICAL ABERRATIONS
440101* --Instrumentation--Radiation Instrumentation-- General Detectors & Monitors
BODY
BODY AREAS
COLLIMATORS
DIAGNOSTIC TECHNIQUES
N46110* --Instrumentation--Radiation Detection Instruments-- General Detectors & Monitors
N48830 --Life Sciences--New Tracer Techniques--Other
NUCLEAR MEDICINE
PHANTOMS
SHIELDING