caa a22 4500 445304480 CHVBK 20180317142608.0 cr unu---uuuuu 170323e20100601xx s 000 0 eng 10.1007/s13246-010-0020-x doi (NATIONALLICENCE)springer-10.1007/s13246-010-0020-x Gadolinium concentration analysis in brain phantom by X-ray fluorescence [Elektronische Daten] [Musaed Almalki, Samir Majid, Philip Butler, Lou Reinisch] We have measured the X-ray fluorescence from gadolinium as a function of concentration and position in tumors of different sizes and shapes in a head phantom. The gadolinium fluorescence was excited with a 36GBq Am-241 source. The fluorescence signal was detected with a CdTe detector and a multi-channel analyzer. The fluorescence peak was clearly separated from the scattered X-rays. Concentrations of 5.62-78.63mg/ml of Gd ion were used in 1, 2, and 3cm diameter spherical tumors and a 2×4cm oblate spheroid tumor. The data show trends approaching saturation for the highest concentrations, probably due to reabsorption in the tumor. A comparison of X-ray photographic imaging and densitometer measurements to determine concentration is also presented. Australasian College of Physical Scientists and Engineers in Medicine, 2010 Gadolinium concentration nationallicence Brain tumor nationallicence Gadolinium nationallicence X-ray fluorescence nationallicence Almalki Musaed Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand aut Majid Samir Department of Nuclear Engineering, King Abdulaziz University, Jeddah, Saudi Arabia aut Butler Philip Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand aut Reinisch Lou Department of Physical and Earth Sciences, Jacksonville State University, 700 Pelham Road North, 36265, Jacksonville, AL, USA aut Australasian Physical & Engineering Sciences in Medicine Springer Netherlands 33/2(2010-06-01), 185-191 0158-9938 33:2<185 2010 33 13246 https://doi.org/10.1007/s13246-010-0020-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13246-010-0020-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Almalki Musaed Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand aut NATIONALLICENCE 700 1- Majid Samir Department of Nuclear Engineering, King Abdulaziz University, Jeddah, Saudi Arabia aut NATIONALLICENCE 700 1- Butler Philip Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand aut NATIONALLICENCE 700 1- Reinisch Lou Department of Physical and Earth Sciences, Jacksonville State University, 700 Pelham Road North, 36265, Jacksonville, AL, USA aut NATIONALLICENCE 773 0- Australasian Physical & Engineering Sciences in Medicine Springer Netherlands 33/2(2010-06-01), 185-191 0158-9938 33:2<185 2010 33 13246 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer