Radiological evaluation of quiet T1-weighted PETRA in comparison with routine brain MPRAGE in pediatric patients
Noriko Aida 1 , Kumiko Nozawa 1 , Yuta Fujii 1 , Koichiro Nomura 1 , Tetsu Niwa 1 , Masahiko Sato 2 , Koki Kusagiri 2 , Yasutake Muramoto 2 , Yuichi Suzuki 2 , Katsutoshi Murata 3 , Matthew Nielsen 3 , David Grodzki 4 , and Takayuki Obata 5
Radiology, Kanagawa Children's Medical
Center, Yokohama, Kanagawa, Japan,
technology, Kanagawa Children's Medical Center,
Yokohama, Kanagawa, Japan,
& Collaboration, Imaging &Therapy System, Siemens Japan,
Resonace, Siemens Healthcare, Erlangen, Bavaria,
Research Center for Charged Particle
Therapy, National Institute of Radiological Sciences,
Clinical efficacy of a prototype T1-weighted PETRA was
prospectively evaluated compared to MPRAGE in 56 sedated
pediatric patients.@PETRA requires very limited
gradient activity and allows for inaudible scanning.
Only 4.8 dB(A) higher than the background acoustic noise
was measured in T1-PETRA in contrast to 34.8dB(A) in
MPRAGE. The ICC scores of degree of myelination in all
but one anatomical area for two readers indicated
excellent agreement. T1-PETRA is very quiet and has good
image quality by using about one minute more scan time,
and it could be substituted for MPRAGE in order to
provide gentler scans to pediatric patients.
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