Aperture modulated arc therapy

S. M. Crooks, Xiaodong Wu, C. Takita, M. Watzich, Lei Xing

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

We show that it is possible to translate an intensity modulated radiation therapy (IMRT) treatment plan and deliver it as a single arc. This technique is referred to in this paper as aperture modulation arc therapy (AMAT). During this arc, the MLC leaves do not conform to the projection of the target PTV and the machine output of the accelerator has a constant value. Dose was calculated using the CORVUS 4.0 IMRT system, which uses a pencil beam dose algorithm, and treatments were delivered using a Varian 2100C/D Clinac. Results are presented for a head and neck and a prostate case, showing the equivalence of the IMRT and the translated AMAT delivery. For a prostate AMAT delivery, coronal plane film dose for the IMRT and AMAT deliveries agreed within 7.19 ± 6.62%. For a meningioma the coronal plane dose distributions were similar to a value of 4.6 ± 6.62%. Dose to the isocentre was measured as being within 2% of the planned value in both cases.

Original languageEnglish (US)
Pages (from-to)1333-1344
Number of pages12
JournalPhysics in Medicine and Biology
Volume48
Issue number10
DOIs
StatePublished - May 21 2003

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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    Crooks, S. M., Wu, X., Takita, C., Watzich, M., & Xing, L. (2003). Aperture modulated arc therapy. Physics in Medicine and Biology, 48(10), 1333-1344. https://doi.org/10.1088/0031-9155/48/10/307