Nadim Jon Shah1,2, Hidehiro Iida3,
Christoph Weirich1, Lutz Tellmann1, Joachim Kaffanke1,
Liliana Caldeira4, Elena Rota Kops1, Stefan Spellerberg5,
Hans Herzog1
1Institute of Neuroscience
& Medicine - 4, Research Centre Jlich, Jlich, Germany; 2Department
of Neurology, Faculty of Medicine, JARA, RWTH Aachen University, Aachen,
Germany; 3Department of Investigative Radiology, National
Cardiovascular Center Research Institute, Osaka; 4Instituto de
Biofsica e Engenharia Biomdica, Faculdade de Cincias da Universidade de
Lisboa, Lisboa, Spain; 5Institute of Neuroscience & Medicine -
5, Research Centre Jlich, Jlich, Germany
In a hybrid MR-PET system, the magnetic field is expected to reduce the positron range in the x-y plane. The positron range of 18F and 120I was investigated from zero up to 9.4T in a 9.4T human whole-body scanner equipped with a BrainPET insert. The positron range (and thus resolution) of 18F is not affected much by the magnetic field. For the more energetic emitter, I120, there is a significant improvement in resolution at 9.4T.