PMID- 28647834 OWN - NLM STAT- MEDLINE DCOM- 20180905 LR - 20181202 IS - 1867-108X (Electronic) IS - 1867-1071 (Linking) VI - 35 IP - 9 DP - 2017 Sep TI - Influence of multi-leaf collimator leaf transmission on head and neck intensity-modulated radiation therapy and volumetric-modulated arc therapy planning. PG - 511-525 LID - 10.1007/s11604-017-0661-8 [doi] AB - The aim of this study was to quantify the effect of multi-leaf collimators (MLCs) with different leaf widths on the planning of intensity-modulated radiation therapy (IMRT) and volumetric-modulated arc therapy (VMAT). Toward this objective, dose transmission through a high-definition 120-leaf MLC (HD120MLC) and 120-leaf Millennium MLC (M120MLC) was investigated, using it with a test case and clinical case studies. In test case, studies with IMRT and VMAT plans, the difference in MLC leaf width had a limited effect on planning target volumes (PTVs). Organs at risk (OARs) were more affected by a reduction in dose transmission through the MLC than by a reduction in MLC leaf width. The results of the test case studies and clinical case studies were mostly similar. In the latter, the different MLCs had no effect on the PTV regardless of the treatment method; however, the HD120MLC plans achieved dose reductions to OARs similar to or larger than the dose reduction of the M120MLC plans. The similar results of the test case and clinical case studies showed that despite a limitation of the irradiation field size, the HD120MLC plans were superior. FAU - Sasaki, Motoharu AU - Sasaki M AD - Department of Radiological Technology, Tokushima University Hospital, 2-50-1 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan. FAU - Tominaga, Masahide AU - Tominaga M AD - Department of Therapeutic Radiology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan. tominaga@tokushima-u.ac.jp. FAU - Kamomae, Takeshi AU - Kamomae T AD - Department of Therapeutic Radiology, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, Aichi, 466-8550, Japan. FAU - Ikushima, Hitoshi AU - Ikushima H AD - Department of Therapeutic Radiology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan. FAU - Kitaoka, Motonori AU - Kitaoka M AD - Department of Radiological Technology, Kagawa University Hospital, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan. FAU - Bando, Ryota AU - Bando R AD - Department of Radiological Technology, Tokushima University Hospital, 2-50-1 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan. FAU - Sakuragawa, Kanako AU - Sakuragawa K AD - Department of Radiological Technology, Tokushima University Hospital, 2-50-1 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan. FAU - Oita, Masataka AU - Oita M AD - Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Okayama Kita-ku, Okayama, 700-8558, Japan. LA - eng PT - Journal Article DEP - 20170624 PL - Japan TA - Jpn J Radiol JT - Japanese journal of radiology JID - 101490689 SB - IM MH - Head and Neck Neoplasms/*radiotherapy MH - Humans MH - Organs at Risk MH - Radiotherapy Dosage MH - Radiotherapy Planning, Computer-Assisted/instrumentation/*methods MH - Radiotherapy, Intensity-Modulated/*methods OTO - NOTNLM OT - Head and neck cancer OT - Intensity-modulated radiation therapy OT - Multi-leaf collimator OT - Volumetric-modulated arc therapy EDAT- 2017/06/26 06:00 MHDA- 2018/09/06 06:00 CRDT- 2017/06/26 06:00 PHST- 2016/08/15 00:00 [received] PHST- 2017/06/13 00:00 [accepted] PHST- 2017/06/26 06:00 [pubmed] PHST- 2018/09/06 06:00 [medline] PHST- 2017/06/26 06:00 [entrez] AID - 10.1007/s11604-017-0661-8 [pii] AID - 10.1007/s11604-017-0661-8 [doi] PST - ppublish SO - Jpn J Radiol. 2017 Sep;35(9):511-525. doi: 10.1007/s11604-017-0661-8. Epub 2017 Jun 24.