The Technical University of Catalonia (UPC), the National Metrology Institute Germany (PTB) and German Federal Office for Radiation Protection (BfS) have analysed response a 50 mm × (diameter height) NaI 38 CeBr3 scintillator, 1500 mm3 CZT semiconductor airborne spectrometric detector mounted on Unmanned Aerial Systems (UAS) in comparison campaign carried out at aerial site Mollerussa (Spain). ...

BACKGROUND Correction of motion has become feasible on cadmium-zinc-telluride (CZT)-based SPECT cameras during myocardial perfusion imaging (MPI). Our aim was to quantify the motion and to determine the value of automatic correction using commercially available software. METHODS AND RESULTS We retrospectively included 83 consecutive patients who underwent stress-rest MPI CZT-SPECT and invasiv...

BACKGROUND The performance of a prototype novel digital single-photon emission computed tomography (SPECT) camera with multiple pixelated CZT detectors and high sensitivity collimators (Digital SPECT; Valiance X12 prototype, Molecular Dynamics) was evaluated in various clinical settings. Images obtained in the prototype system were compared to images from an analog camera fitted with high-resol...

Nuclear detectors for x-ray and gamma-ray spectroscopy imaging are a vital tool in many homeland security, medical imaging, astrophysics other applications. Most of these applications require room-temperature operation due to the operational constraints imposed by cryogenic cooling system. CdZnTe (CZT) has been main material with desired detection properties, CZT crystals have used commercially...

BACKGROUND Attenuation correction (AC) improves the diagnostic outcome of stress-only myocardial perfusion imaging (MPI) using conventional SPECT. Our aim was to determine the value of AC using a cadmium zinc telluride-based (CZT)-SPECT camera. METHODS AND RESULTS We retrospectively included 107 consecutive patients who underwent stress-optional rest MPI CZT-SPECT/CT. Next, we created three t...

Estimating the frequencies of multiple superimposed exponentials in noise is an important problem due to its various applications engineering. In order obtain good inhibition spectral leakage and improve estimation accuracy, improved Chirp-Z transform (CZT) algorithm proposed for high-precision frequency estimation. Firstly, analyzes characteristics CZT spectrum utilizes construct a bias correc...