Whole Three-Dimensional Dosimetry of Carbon Ion Beams with an MRI-Based Nanocomposite Fricke Gel Dosimeter Using Rapid T1 Mapping Method

MRI-based gel dosimeters are attractive systems for the evaluation of complex dose distributions in radiotherapy. In particular, the nanocomposite Fricke gel dosimeter is one among a few dosimeters capable of accurately evaluating the dose distribution of heavy ion beams. In contrast, reduction of t...

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Bibliographic Details
Published in:Gels 2021-11, Vol.7 (4), p.233
Main Authors: Mizukami, Shinya, Watanabe, Yusuke, Mizoguchi, Takahiro, Gomi, Tsutomu, Hara, Hidetake, Takei, Hideyuki, Fukunishi, Nobuhisa, Ishikawa, Kenichi L., Fukuda, Shigekazu, Maeyama, Takuya
Format: Article
Language:English
Subjects:
Accuracy
Automation
Carbon
Dosimeters
Dosimetry
Evaluation
Gamma rays
gel dosimeter
heavy ion beam dosimetry
Heavy ions
Ion beams
linear energy transfer
Magnetic fields
Measurement methods
Methods
MRI
nanocomposite Fricke
Nanocomposites
NMR
Nuclear magnetic resonance
Polymers
Polymethyl methacrylate
Radiation therapy
Scanning
Systems analysis
variable flip angle
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Summary:MRI-based gel dosimeters are attractive systems for the evaluation of complex dose distributions in radiotherapy. In particular, the nanocomposite Fricke gel dosimeter is one among a few dosimeters capable of accurately evaluating the dose distribution of heavy ion beams. In contrast, reduction of the scanning time is a challenging issue for the acquisition of three-dimensional volume data. In this study, we investigated a three-dimensional dose distribution measurement method for heavy ion beams using variable flip angle (VFA), which is expected to significantly reduce the MRI scanning time. Our findings clarified that the whole three-dimensional dose distribution could be evaluated within the conventional imaging time (20 min) and quality of one cross-section.
ISSN:2310-2861
2310-2861
DOI:10.3390/gels7040233