Inverse Collimator-Based Radiation Imaging Detector System

CdZnTe strip detector SPECT imaging with a slit collimator.

In this paper, we propose a CdZnTe rotating and spinning gamma camera attached with a slit collimator. This imaging system acquires convergent planar integrals of a radioactive distribution. Two analytical image reconstruction algorithms are proposed. Preliminary phantom studies show that our small CdZnTe camera with a slit collimator outperforms a larger NaI(Tl) camera with a pinhole collimato...

Using a gas-filled detector in a rotation modulation collimator system for near-field imaging

Rotation modulation collimators (RMC) are a class of nuclear imaging devices that are found in various applications. RMC are used for far-field applications, as in astronomy, and in near-field applications, as in environmental, medical and military uses. The typical detectors used in RMC system are scintillators and semi-conductors, which detect γ radiation only. This work investigates the util...

GE Healthcare Evolution for BoneTM Collimator-Detector Response Compensation in Iterative SPECT Imaging Reconstruction Algorithm

Investigation of Detector Collimator Effects for Dual Modality Mr -nuclear Imaging

Purpose: Most of the nuclear imaging systems, especially those that are based on single photon emission detection, require the use of a collimatorusually made out of lead (Pb) or some other high Z material such as tungsten (W). Even some PET systems employ some sort of slat-septa collimation, although the important part of PET image formation is done electronically via coincidence detection. Mu...

Characterization of a Novel Revolving Radiation Collimator

Introduction The ZAP-X is a novel self-contained and first-of-its-kind self-shielded therapeutic radiation device dedicated to brain and head and neck radiosurgery. By utilizing a 2.7-MV linear accelerator and incorporating a design in which a beam stop and major mechanical elements serve a radiation shielding function, the Zap-X does not typically require a radiation bunker. The unique collima...