Security

A machine learning approach in the estimation of a radioactive source position using a coded aperture device

Coded Aperture γ-cameras have been used for more than three decades for imaging radioactive source distributions encountered in astrophysics, in decommissioning of nuclear facilities, and in nuclear medicine. These devices enable the identification …

Radioactive source localization using a data driven MVA method

We present a small form factor (0.5 cm3) static CdZnTe (CZT) sensor network consisted of a number of Non Directional Detectors (NDD) capable to localize a stationary radiation source in 3D. The localization is performed with fusion algorithms based …

An AI Approach in Radioactive Source Localization by a Network of Small Form Factor CZT Sensors

We present a small form factor (0.5𝑐𝑚3) static CZT sensor net-work consisted of a number of Non- Directional Detectors (NDD)capable to localize a stationary radiation source in 3D. The localiza-tion is performed with a fusion algorithm based on AI …

Localization of radioactive source using a network of small form factor CZT sensors

We present a small factor (0.5 cm3) CZT static sensor network consisted of a number of Non-Directional Detectors (NDD) capable to localize bare and lightly shielded radiation sources. The localization is performed with a fusion algorithm based on a …

Imaging of spatially extended hot spots with coded apertures for intra-operative nuclear medicine applications

Coded aperture imaging transcends planar imaging with conventional collimators in efficiency and Field of View (FOV). We present experimental results for the detection of 141 keV and 122 keV γ-photons emitted by uniformly extended 99mTc and 57Co …

A setup for gamma ray sources localization using coded apertures and CdTe detectors

We describe a setup which consists of two CdTe based gamma cameras with coded apertures and a video camera. The system is used for the localization of radioactive sources via triangulation. By adjusting the mask-to-detector distance the maximum Fully …

A system of gamma ray imaging devices with coded apertures

We describe a system consisting of two CdTe based gamma cameras with coded apertures and a video camera. The system is used for the localization of radioactive sources with the aid of triangulation. The methods used and the performance of the system …

Radioactive source localization by a two detector system

The development of instruments utilizing coded apertures has become more feasible with the progress of the Cd(Zn)Te hybrid detector technology. The collective performance of systems comprised by such devices can be evaluated in all the fields where …

Review of Feasibilities studies for the Localization of Radioactive Sources from a Portable Radiation Detector based on pixelated CdTe crystals

We review the feasibility studies performed regarding the ability of a proposed portable radiation CdTe pixelated detecting system to localize radioactive sources. The proposed instrument is a stack of ten CdTe layers …

A Gamma Spectroscopic Radiation Detector for Security Purposes

We present the development of a stacked gamma radiation detecting system, consisting of three layers of pixelated Cadmium Telluride detectors (PID350). A high speed (120 frames/s) data acquisition system has been developed in order the …