PMID- 26340939 OWN - NLM STAT- MEDLINE DCOM- 20160321 LR - 20181202 IS - 1439-099X (Electronic) IS - 0179-7158 (Linking) VI - 191 IP - 12 DP - 2015 Dec TI - Simultaneous integrated vs. sequential boost in VMAT radiotherapy of high-grade gliomas. PG - 945-52 LID - 10.1007/s00066-015-0888-1 [doi] AB - BACKGROUND: In 20 patients with high-grade gliomas, we compared two methods of planning for volumetric-modulated arc therapy (VMAT): simultaneous integrated boost (SIB) vs. sequential boost (SEB). The investigation focused on the analysis of dose distributions in the target volumes and the organs at risk (OARs). METHOD: After contouring the target volumes [planning target volumes (PTVs) and boost volumes (BVs)] and OARs, SIB planning and SEB planning were performed. The SEB method consisted of two plans: in the first plan the PTV received 50 Gy in 25 fractions with a 2-Gy dose per fraction. In the second plan the BV received 10 Gy in 5 fractions with a dose per fraction of 2 Gy. The doses of both plans were summed up to show the total doses delivered. In the SIB method the PTV received 54 Gy in 30 fractions with a dose per fraction of 1.8 Gy, while the BV received 60 Gy in the same fraction number but with a dose per fraction of 2 Gy. RESULTS: All of the OARs showed higher doses (Dmax and Dmean) in the SEB method when compared with the SIB technique. The differences between the two methods were statistically significant in almost all of the OARs. Analysing the total doses of the target volumes we found dose distributions with similar homogeneities and comparable total doses. CONCLUSION: Our analysis shows that the SIB method offers advantages over the SEB method in terms of sparing OARs. FAU - Farzin, Mostafa AU - Farzin M AD - Department of Radiation Oncology, Klinikum rechts der Isar, Technische Universitat Munchen, Ismaninger Strasse 22, 81675, Munich, Germany. mfarzin1355@yahoo.com. AD - Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Science, Tehran, Iran. mfarzin1355@yahoo.com. FAU - Molls, Michael AU - Molls M AD - Department of Radiation Oncology, Klinikum rechts der Isar, Technische Universitat Munchen, Ismaninger Strasse 22, 81675, Munich, Germany. michael.molls@lrz.tum.de. FAU - Astner, Sabrina AU - Astner S AD - Department of Radiation Oncology, Klinikum rechts der Isar, Technische Universitat Munchen, Ismaninger Strasse 22, 81675, Munich, Germany. Sabrina.Astner@gmx.de. FAU - Rondak, Ina-Christine AU - Rondak IC AD - Institut fur Medizinische Statistik und Epidemiologie, Klinikum rechts der Isar, Technische Universitat Munchen, Munich, Germany. ina.rondak@tum.de. FAU - Oechsner, Markus AU - Oechsner M AD - Department of Radiation Oncology, Klinikum rechts der Isar, Technische Universitat Munchen, Ismaninger Strasse 22, 81675, Munich, Germany. markus.oechsner@lrz.tu-muenchen.de. LA - eng PT - Clinical Study PT - Comparative Study PT - Journal Article DEP - 20150904 PL - Germany TA - Strahlenther Onkol JT - Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] JID - 8603469 SB - IM MH - Adult MH - Aged MH - Astrocytoma/pathology/*radiotherapy MH - Brain Neoplasms/pathology/*radiotherapy MH - Combined Modality Therapy MH - *Dose Fractionation, Radiation MH - Female MH - Glioblastoma/pathology/*radiotherapy MH - Humans MH - Male MH - Middle Aged MH - Neoplasm Grading MH - Organs at Risk/radiation effects MH - Radiation Injuries/prevention & control MH - Radiotherapy Dosage MH - *Radiotherapy Planning, Computer-Assisted MH - Radiotherapy, Adjuvant MH - Radiotherapy, Intensity-Modulated/*methods OTO - NOTNLM OT - High-grade glioma OT - Organs at risk OT - Sequential boost OT - Simultaneous integrated boost OT - Volumetric-modulated arc therapy EDAT- 2015/09/06 06:00 MHDA- 2016/03/22 06:00 CRDT- 2015/09/06 06:00 PHST- 2014/12/08 00:00 [received] PHST- 2015/08/07 00:00 [accepted] PHST- 2015/09/06 06:00 [entrez] PHST- 2015/09/06 06:00 [pubmed] PHST- 2016/03/22 06:00 [medline] AID - 10.1007/s00066-015-0888-1 [pii] AID - 10.1007/s00066-015-0888-1 [doi] PST - ppublish SO - Strahlenther Onkol. 2015 Dec;191(12):945-52. doi: 10.1007/s00066-015-0888-1. Epub 2015 Sep 4.