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SUMMARY:Study of sensibility for a new  gamma-MRI compatible detector
DTSTART;VALUE=DATE-TIME:20201215T163000Z
DTEND;VALUE=DATE-TIME:20201215T164500Z
DTSTAMP;VALUE=DATE-TIME:20260808T005644Z
UID:indico-contribution-13913@indico.ific.uv.es
DESCRIPTION:Speakers: Andrea Abril Fajardo (Universidad Javeriana y Univer
 sidad Nacional de Colombia)\nUp today\, hybrid nuclear medicine image syst
 ems basically integrate two techniques: X-ray based or MRI for anatomic im
 ages and PET for the functional ones [1]. These systems need instrumentati
 on susceptible to interfere with the MRI signal during the photon-charges 
 conversion process in the photomultiplier or other similar detector techni
 ques.\nWe propose a hybrid system whose main characteristic is that the ga
 mma image is obtained directly by MRI [2\,3] (patent pending).\nThe detect
 or is based on a radiosensitive gel whose absorbed radiation produces poly
 merization changes. These changes are linearly dependent on T2 relaxation 
 time [4] among other MRI parameters.\nIn this work\, the features of the g
 amma detector gel are explored as hybrid image technique by GEANT4 Monte C
 arlo simulations\, as well as the radiation process and statistical noise 
 on radiation MRI images.\nIt is presented the preliminary designs using tw
 o different collimators\, comparing the limits and optimal conditions of s
 ensibility as a function of the absorbed dose and SNR in the MRI.\nFinally
 \, an experimental prototype for one-dimensional images is tested proving 
 the viability of the previous simulations. \n[1] Andrew B. Rosenkrantz\, K
 ent Friedman\, Hersh Chandarana\, et al. Current Status of Hybrid PET/MRI 
 in Oncologic\nImaging American Journal of Roentgenology. 2016\;206: pp 162
 -172.\n[2] L. Agulles-Pedrós and A. Abril One dimensional spatial resolut
 ion optimization on a hybrid low field MRI-gamma\ndetector AIP Conference 
 Proceedings (2016) 1753\, 080020\;\n[3] A. Abril and L. Agulles-Pedrós 2D
  dose distribution images of a hybrid low field MRI-γ detector AIP Confer
 ence\nProceedings (2016) 1753\, 080012\;\n[4] C Baldock. Topical review: P
 olymer gel dosimetry\, The Journal of Physics Medical Biology\, 2010 Feb 1
 1th\; 55(5):\nR1–R63.\n\nhttps://indico.ific.uv.es/event/5983/contributi
 ons/13913/
LOCATION:Virtuales
URL:https://indico.ific.uv.es/event/5983/contributions/13913/
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