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Optimizing pinhole and parallel hole collimation for scintimammography with compact pixellated detectors

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5 Author(s)
Smith, M.F. ; Thomas Jefferson Nat. Accelerator Facility, Newport News, VA, USA ; Kieper, D.A. ; Majewski, S. ; Weisenberger, A.G.
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The relative advantages of pinhole and parallel hole collimators for scintimammography with compact, pixellated gamma detectors were investigated using analytic models of resolution and sensitivity. Collimator design was studied as follows. A desired object resolution was specified for a pixellated detector with a given crystal size and intrinsic spatial resolution and for a given object-to-collimator distance. Using analytic formulas, pinhole and parallel hole collimator parameters were calculated that satisfy this object resolution with optimal geometric sensitivity. Analyses were performed for 15 cm × 20 cm field of view detectors with crystal elements 1.0, 2.0 and 3.0 mm on a side and 140 keV incident photons.

Published in:

Nuclear Science Symposium Conference Record, 2002 IEEE  (Volume:3 )

Date of Conference:

10-16 Nov. 2002

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