Nuclear Medicine & Radiation Therapy

Hiroshi Mayahara

Publications

• Research Article
  A Dosimetric Comparison of Volumetric Modulated Arc Therapy (VMAT) with Unflattened Beams to VMAT with Flattened Beams and Tomotherapy for Head and Neck Cancer
  Author(s): Toshiyuki Ogata, Hideki Nishimura, Hiroshi Mayahara, Aya Harada, Yoshiro Matsuo, Masao Nakayama, Kazuyuki Uehara, Shinji Tsudou, Yasuo Ejima, Ryohei Sasaki and Takanobu OkayamaToshiyuki Ogata, Hideki Nishimura, Hiroshi Mayahara, Aya Harada, Yoshiro Matsuo, Masao Nakayama, Kazuyuki Uehara, Shinji Tsudou, Yasuo Ejima, Ryohei Sasaki and Takanobu Okayama
  
  Background: The purpose of this study was to compare the dose distributions and treatment delivery efficiency of volumetric modulated arc therapy (VMAT) with flattening filter free (FFF) beams (FFF-VMAT) against VMAT with flattening filter (FF) beams (FF-VMAT) and Helical TomoTherapy (HT) for head and neck cancer. Methods: Ten patients with nasopharyngeal and oropharyngeal cancer were chosen for this planning comparison study. Three treatment plans (dual arc FFF-VMAT, dual arc FF-VMAT, and HT) were created for each patient. The three prescription dose levels of the planning target volumes were 69.96, 60, and 54 Gy in 33 fractions, using the simultaneous integrated boost technique. Comparisons of the plan quality were performed by analyzing the homogeneity, conformity, dose to the organs at risk (OARs), the number of monitor units (MUs), and beam-on time (BOT) necessary for del.. Read More»
  DOI: 10.4172/2155-9619.1000274

  Abstract PDF