Advancing Nuclear Breast Imaging with the use of High-Purity Germanium detectors

Campbell, Desmond L.; Peterson, Todd E.

doi:10.1109/nssmic.2010.5874354

Cited by 3 publications

(1 citation statement)

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“…Using the integrated parallel-hole collimator, the GGC1.1 is capable of defining sub-centimeter sized spheres in a 5:1 tumor to background environment at a 1-cm depth. This finding complements our computation work in exploring HPGe imaging systems for breast imaging [11], and shows the potential for use of these systems in Even with its current performance, improvements can still be made to the GGC1.1. Previous HPGe DSSDs have measured intrinsic spatial resolutions less than 2 mm, while this system currently exhibits 2.5 mm resolution.…”

Section: Discussionsupporting

confidence: 68%

Evaluation of a compact, general-purpose Germanium Gamma Camera

Campbell

Hull²,

Peterson

2013

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)

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Technological advances in High-Purity Germanium (HPGe) detectors have given rise to compact, mechanically cooled gamma cameras that do not require bulky liquid nitrogen dewars to operate. When used in the double-sided strip configuration, spatial resolution finer than the strip width can be obtained using pulse signal analysis for position interpolation. With 3D position sensitivity and excellent energy resolution (1% FWHM at 140 keV), HPGe detectors have many possible applications in biomedical imaging. Here, we introduce the Germanium Gamma Camera (GGC1.1), a fully integrated imaging system incorporating a 90-mm diameter, 10-mm thick germanium detector with 16 x 16 orthogonal strips of 5-mm pitch having 0.25-mm wide gaps between the strips. All data acquisition, system control, and system monitoring functions are accessed through a single USB-2.0 port. An integrated assembly also allows for interchangeable mounting of parallel-hole and pinhole collimators. The intrinsic properties of the GGC1.1 detector system are measured according to the NEMA NU 1-2007 standards for gamma cameras, including detector efficiency, spatial resolution, energy resolution, and uniformity. In addition, we demonstrate the planar imaging capabilities of the GGC1.1 with the parallel-hole and pinhole collimators by scanning line sources, as well as a phantom comprised of spherical hot spots in a warm background.

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Section: Discussionsupporting

confidence: 68%