We outline our plan to develop ProtoEXIST, a balloon-borne prototype experiment for the Energetic X-ray Imaging Survey Telescope (EXIST) for the Black Hole Finder Probe. EXIST will consist of multiple wide-field hard X-ray coded-aperture telescopes. The current design of the EXIST mission employs two types of telescope systems: high energy telescopes (HETs) using CZT detectors, and low energy t...

PURPOSE Small field-of-view CdZnTe (CZT) gamma cameras are increasingly studied for breast lesion detection to complement mammography or ultrasonographic findings. However, in classical collimation configurations, they remain limited by the trade-off between spatial resolution and sensitivity. The HiSens architecture was proposed to overcome these limitations. Using an accurate 3D localization ...

The CZT detector on the InFOCμS hard X-ray telescope is a pixellated solid-state device capable of imaging spectroscopy by measuring the position and energy of each incoming photon. The detector sits at the focal point of an 8m focal length multilayered grazing incidence X-ray mirror which has significant effective area between 20–40 keV. The detector has an energy resolution of 4.0 keV at 32 k...

Several payloads for hard X-ray (20-600 keV) imaging with coded aperture telescopes have been developed for balloon flight observations of cosmic x-ray sources. We briefly review the characteristics of these, particularly the EXITE2 system. The recent NASA program to develop an extended long duration (100d) balloon flight capability employing super-pressure balloons would allow a qualitatively ...

We are currently developing Cadmium Zinc Telluride (CZT) detectors for a next-generation space-borne hard X-ray telescope which can follow up on the highly successful NuSTAR (Nuclear Spectroscopic Telescope Array) mission. Since launch of in 2012, there have been major advances area mirrors, and state-of-the-art mirrors improve NuSTAR's angular resolution ~1 arcmin Half Power Diameter (HPD) to ...

Cadmium Zinc Telluride is an emerging material for room temperature radiation detectors. In order to optimize the performance of these detectors, it is important to determine how the electronic properties of CZT are related to the presence of impurities and defects , that are introduced during the crystal growth and detector fabrication. At the Sandia microbeam facility IBICC and Time Resolved ...

Software engineering diagrams are hard to verify and formally analyse, often due to inadequately defined diagram semantics: the semantics often does not enable formal analysis, or may be underspecified to a degree that does not allow useful properties to be checked. The AUtoZ tools (jamesrobertwilliams.co.uk/autoz.php) provide formalisation in the style of commercially-acceptable model manageme...

The optical C T (Computerized Tomography), which utilises light transmitted through a semi-opaque object extends vision to the inside of objects. The projection profiles of the optical C T are smeared due to the scattering of light in a translucent medium. In the image reconstruction for MRI (Magnetic Resonance Imaging), FID (Free Induction Decay) signals consisting of decaying sinusoids inevit...

BACKGROUND The impact of increased energy resolution of cadmium-zinc-telluride (CZT) cameras on the assessment of left ventricular function under dual-isotope conditions (99mTc and 123I) remains unknown. The Amsterdam-gated dynamic cardiac phantom (AGATE, Vanderwilt techniques, Boxtel, The Netherlands) was successively filled with a solution of 123I alone, 99mTc alone, and a mixture of 123I and...