%0 Journal Article %A Cedric Desmonts %A Mohammed Abdeldjalil Bouthiba %A Blandine Enilorac %A Denis Agostini %A Nicolas Aide %T Performance evaluation of a new multipurpose whole-body CzT-based camera: comparison with a dual head anger camera %D 2019 %J Journal of Nuclear Medicine %P 1384-1384 %V 60 %N supplement 1 %X 1384Objectives: The VERITON system is a multi-purpose fully 3D SPECT camera based on CzT detectors that benefits from a new architecture of detection and enables whole-body imaging. The aim of this study was to evaluate the performances of this camera compared to a conventional dual-head anger camera. Methods: Different line sources and phantom measurements with acquisition and reconstruction parameters identical to those used in clinical routine, were performed on each system to evaluate spatial resolution, sensitivity, energy resolution and image quality. Extrinsic resolution was assessed using a capillary source of 99mTc placed successively in air and in a cylindrical phantom filled with non-radioactive water. Tomographic acquisitions were performed with the line source placed at the center of the field-of-view with a radius of rotation of 15 cm. A spectral acquisition of a 99mTc source was performed to evaluate energy resolution by computing the FWHM of the measured photoelectric peak. Tomographic sensitivity was calculated using a 99mTc point source (approximately 25 MBq) placed at 15 cm distance from the detectors by recording the total number of counts detected during a 5- minute acquisition. Sensitivity was also evaluated using the focus mode for the VERITON camera which consists in collecting data in a reduced field-of-view defined by the user. Image quality was assessed with a Jasczack phantom filled with 350 MBq of Tc 99m and scanned on each system with 30, 20, 10 and 5-minute acquisition times. Results: Extrinsic resolution at the centre of the field-of-view was estimated at 5.15 mm in air and 5.67mm with a scatter medium which was similar to measurements performed on the conventional system (4.71 mm 5.71 mm, respectively). The energy resolution of the Veriton system at 140 keV was 3.9% versus 9.21% for the anger camera. Tomographic sensitivity was estimated at 259 count.s-1.MBq-1 and increased to 745 count.s-1.MBq-1 using a focus mode, which were respectively 1.6 times and 5 times greater than the sensitivity measured on the anger camera (155 count.s-1.MBq-1). Jaszczak phantom showed high image contrast uniformity and signal to noise ratio on the CzT system, even when decreasing acquisition time by a 6-fold factor. Representative clinical cases are shown to illustrate these results. Conclusions: The VERITON camera has a superior sensitivity, a higher energy resolution and a better image contrast than a conventional SPECT camera, whereas spatial resolution remains similar. %U