UNLABELLED This study compared two SPECT cameras with cadmium-zinc-telluride (CZT) detectors to a conventional Anger camera with cardiofocal collimators for the assessment of left ventricular (LV) function in a phantom and patients. METHODS A gated dynamic cardiac phantom was used. Eighteen acquisitions were processed on each CZT camera and the conventional camera. The total number of counts ...

This paper describes t he design and performance o f c h i r p c o r r e l a t o r s used i n a f e a s i b i l i t y study o f speech t r a n s f o r m coding. Two chips have been evaluated, a 50-point Block CZT processor and a 100-point s l i d i n g CZT processor. The r e l a t i v e m e r i t s of the two systems are compared i n the context of data-compression o f speech s i g n a l s usin...

Purpose: To investigate the feasibility of dual-modal on-board spectral-CT/CBCT imaging using a CZT photon-counting detector mounted on Linac by Monte Carlo simulations. Methods: In this proof-of-concept study, software platform Geant4 Application for Tomography Emission (GATE) and high-performance computing hardware were utilized to design validate novel spectral-CT conventional CBCT system si...

ProtoEXIST2 (P2) was a prototype imaging X-ray detector plane developed for wide-field Time Domain Astrophysics (TDA) in the 5 - 200 keV energy band. It composed of an 8 $\times$ array mm thick, 2cm pixelated (32 32) CdZnTe (CZT) detectors with 0.6 pitch that utilize NuSTAR ASIC(NuASIC) readout. During initial development process leading up to post-flight examination entire plane, distortions e...

The Image watermarking assumes a vital part in different applications like secure information transmission and Image copyright assurance. Watermarking method can be isolated into spatial and change space technique. A watermarking method is said to be idealize on the off chance that it works better in case of different assaults. This paper presents different methods of picture watermarking. The ...

The Polaris-LAMP multi-modal 3-D gamma-ray imager is a radiation mapping and imaging platform which uses commercial off-the-shelf (COTS) detector integrated with contextual sensor localization platform. integration of these systems enables free-moving capability proximity mapping, coded-aperture, Compton modalities, can create reconstruction photon sources from tens keV to several MeV. Gamma-ra...

The Community Z Tools (CZT) project is an open-source Java framework for building formal methods tools for Z and Z dialects. It also includes a set of tools for parsing, typechecking, transforming and printing standard Z specifications in LTEX, Unicode or XML formats. This paper gives an overview of the CZT framework, including an introduction to its visitor design pattern that makes it possibl...

OBJECTIVE Almost all small animal SPECT is performed with pinhole collimators (PH), including single-PH (SPH) and multi-PH (MPH). In the clinical study, not only PH but also parallel-hole collimator (PAH) is often used in planar and SPECT imaging. However, there have been no comparative studies on image quality with various collimators on the small animal imaging. This study compared the basic ...

BACKGROUND Robust quantitative analysis in positron emission tomography (PET) and in single-photon emission computed tomography (SPECT) typically requires the time-activity curve as an input function for the pharmacokinetic modeling of tracer uptake. For this purpose, a new automated tool for the determination of blood activity as a function of time is presented. The device, compact enough to b...