Vaquero J.J.,Hospital General Universitario GregorioMaranon |
Udilas J.M.,Complutense University of Madrid |
Seidel J.,U.S. National Institutes of Health |
Seidel J.,SAIC |
And 3 more authors.
IEEE Transactions on Nuclear Science | Year: 2010
Super Bialkali (SBA) photocathode is a new technology that improves the spectral response characteristics of position sensitive PMTs, boosting their quantum efficiency up to 35%. In this experiment, two SBA tubes were introduced into a production line of PET detectors mixed with the regular tubes. The detectors were assembled using the standard factory protocols for detector mounting, calibration and testing. We report an evaluation of the improvement introduced by the SBA photocathode comparing the spatial and energy resolution and the depth-of-interaction (DOI) performance of PET detector modules with DOI capabilities. We conclude that the superior performance of the SBA tube may enable the use of arrays with a larger number of crystals of smaller footprint, thus potentially improving the detector intrinsic spatial resolution without degrading the energy resolution or the phoswich (DOI) discrimination capability. © 2010 IEEE.
Fernandez-Llamazares C.M.,Servicio de Farmacia |
Manrique-Rodriguez S.,Servicio de Farmacia |
Sanjurjo-Saez M.,Hospital General Universitario GregorioMaranon
Archivos Argentinos de Pediatria | Year: 2011
Many studies have reported increased pediatric susceptibility to the development of errors; children are more vulnerable, so it is very important to guarantee the best therapeutic results at the lowest risk. There are many studies related to prescription of drugs in pediatrics under conditions other than those authorized. Studies show that approximately 50% of the drugs used in children are off label or unlicensed, and in about 70% of pediatric patients at least one drug is prescribed under those conditions.