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Impact of volumetric modulated arc therapy technique on treatment with partial breast irradiation.

Publication ,  Journal Article
Qiu, J-J; Chang, Z; Wu, QJ; Yoo, S; Horton, J; Yin, F-F
Published in: Int J Radiat Oncol Biol Phys
September 1, 2010

PURPOSE: To investigate the technical feasibility of volumetric modulated arc therapy (V-MAT) in the delivery of partial breast irradiation (PBI). METHODS AND MATERIALS: V-MAT and the standard, three-dimensional conformal radiotherapy (3D-CRT), were compared retrospectively in 8 patients previously treated with PBI. These patients' plans were replanned with a single partial arc using V-MAT that included partial blocking to minimize normal tissue dose. Dosimetric parameters were calculated to evaluate plan quality. Quality assurance studies included verifying both the point and the multiple planar doses. Total monitor units and delivery time were also evaluated, and collision clearance was analyzed. RESULTS: Volumes of ipsilateral lung irradiated to 10 Gy (V10) and 20 Gy (V20) by V-MAT were significantly less than those of 3D-CRT (p = 0.03 for V10 and p = 0.025 for V20). The volume of ipsilateral breast irradiated to 5 Gy was significantly less by using V-MAT than with 3D-CRT (p = 0.02), with a ratio of integrated dose of <1.00. The total mean monitor units (489 +/- 38) for V-MAT were significantly less than those for 3D-CRT (634 +/- 123) (p = 0.017), with a 23% reduction. The average machine delivery time was 1.21 +/- 0.10 min for the V-MAT plans and 6.28 +/- 1.40 min for the 3D-CRT plans, resulting in a reduction factor of 80.1%. The conformity indexes were 1.3 in the V-MAT plans and 1.5 in the 3D-CRT plans (p = 0.102). CONCLUSIONS: V-MAT technology is feasible for PBI patients. Compared to a conventional 3D-CRT technique, it is more efficient, offers equivalent or better dose conformity, delivers lower doses to the ipsilateral lung and breast, and may potentially reduce intrafractional motion.

Duke Scholars

Published In

Int J Radiat Oncol Biol Phys

DOI

EISSN

1879-355X

Publication Date

September 1, 2010

Volume

78

Issue

1

Start / End Page

288 / 296

Location

United States

Related Subject Headings

  • Time Factors
  • Retrospective Studies
  • Radiotherapy, Intensity-Modulated
  • Radiotherapy, Conformal
  • Radiotherapy Planning, Computer-Assisted
  • Radiotherapy Dosage
  • Radiography
  • Radiation Injuries
  • Oncology & Carcinogenesis
  • Mastectomy, Segmental
 

Citation

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MLA
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Qiu, J.-J., Chang, Z., Wu, Q. J., Yoo, S., Horton, J., & Yin, F.-F. (2010). Impact of volumetric modulated arc therapy technique on treatment with partial breast irradiation. Int J Radiat Oncol Biol Phys, 78(1), 288–296. https://doi.org/10.1016/j.ijrobp.2009.10.036
Qiu, Jian-Jian, Zheng Chang, Q Jackie Wu, Sua Yoo, Janet Horton, and Fang-Fang Yin. “Impact of volumetric modulated arc therapy technique on treatment with partial breast irradiation.Int J Radiat Oncol Biol Phys 78, no. 1 (September 1, 2010): 288–96. https://doi.org/10.1016/j.ijrobp.2009.10.036.
Qiu J-J, Chang Z, Wu QJ, Yoo S, Horton J, Yin F-F. Impact of volumetric modulated arc therapy technique on treatment with partial breast irradiation. Int J Radiat Oncol Biol Phys. 2010 Sep 1;78(1):288–96.
Qiu, Jian-Jian, et al. “Impact of volumetric modulated arc therapy technique on treatment with partial breast irradiation.Int J Radiat Oncol Biol Phys, vol. 78, no. 1, Sept. 2010, pp. 288–96. Pubmed, doi:10.1016/j.ijrobp.2009.10.036.
Qiu J-J, Chang Z, Wu QJ, Yoo S, Horton J, Yin F-F. Impact of volumetric modulated arc therapy technique on treatment with partial breast irradiation. Int J Radiat Oncol Biol Phys. 2010 Sep 1;78(1):288–296.
Journal cover image

Published In

Int J Radiat Oncol Biol Phys

DOI

EISSN

1879-355X

Publication Date

September 1, 2010

Volume

78

Issue

1

Start / End Page

288 / 296

Location

United States

Related Subject Headings

  • Time Factors
  • Retrospective Studies
  • Radiotherapy, Intensity-Modulated
  • Radiotherapy, Conformal
  • Radiotherapy Planning, Computer-Assisted
  • Radiotherapy Dosage
  • Radiography
  • Radiation Injuries
  • Oncology & Carcinogenesis
  • Mastectomy, Segmental