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Design of a near-field coded aperture cameras for high-resolution medical and industrial gamma-ray imaging
- R. Accorsi
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2001.
Analytic determination of the resolution-equivalent effective diameter of a pinhole collimator
To account for photon penetration, the formulas used to calculate the geometric resolution of a pinhole collimator use an equivalent diameter d/sub e/ rather than the physical diameter of the… Expand
Optimization of a fully 3D single scatter simulation algorithm for 3D PET.
- R. Accorsi, Lars-Eric Adam, M. Werner, J. Karp
- Medicine, Physics
- Physics in medicine and biology
- 21 June 2004
We describe a new implementation of a single scatter simulation (SSS) algorithm for the prediction and correction of scatter in 3D PET. In this implementation, out of field of view (FoV) scatter and… Expand
A coded aperture for high-resolution nuclear medicine planar imaging with a conventional Anger camera: experimental results
Coded apertures have been investigated in the past for their promise of an improved signal-to-noise ratio (SNR) over pinhole and collimator systems. We describe a coded aperture camera designed for… Expand
Optimal coded aperture patterns for improved SNR in nuclear medicine imaging
During a Nuclear Medicine project that called for the optimal design of a coded aperture we found that lowthroughput masks do not always provide a Signal-to-Noise Ratio (SNR) advantage. In this… Expand
On-axis sensitivity and resolution of a slit-slat collimator.
- S. Metzler, R. Accorsi, J. Novak, A. Ayan, R. Jaszczak
- Medicine, Physics
- Journal of nuclear medicine : official…
- 1 November 2006
UNLABELLED A slit-slat collimator combines a slit along the axis of rotation with a set of axial septa, offering both magnification in the transaxial direction and complete sampling with just a… Expand
Improved Dose Regimen in Pediatric PET
PET image quality depends strongly on patient weight and habitus, decreasing for increasing weight and body mass index. Common adult injection rules prescribe either a dose proportional to weight or… Expand
Resolution-effective diameters for asymmetric-knife-edge pinhole collimators
The effects of penetration are included in the formulas for the prediction of the resolution of pinhole collimators through the use of effective diameters. Expressions of the resolution-effective… Expand
Non-diverging analytic expression for the on-axis sensitivity of converging collimators: analytic derivation.
The expressions for the sensitivity of converging collimators found in the literature diverge at points near the focal locus of the collimator. In this paper, an analytical formula that does not… Expand
Brain Single-Photon Emission CT Physics Principles
- R. Accorsi
- Physics, Medicine
- American Journal of Neuroradiology
- 1 August 2008
SUMMARY: The basic principles of scintigraphy are reviewed and extended to 3D imaging. Single-photon emission computed tomography (SPECT) is a sensitive and specific 3D technique to monitor in vivo… Expand