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Optimal planning strategy among various arc arrangements for prostate stereotactic body radiotherapy with volumetric modulated arc therapy technique

Introduction Prostate cancer is the most common cancer in men, accounting for over one fifth of male cancer diagnoses, with the number of prostate cancer patients rapidly increasing. Various radiotherapy techniques for treating prostate cancer have been considered effective noninvasive treatment options, especially for elderly patients and those unfit for surgery. 1 - 3 Radiation therapy options for prostate cancer include external beam radiation therapy (EBRT) and brachytherapy. Volumetric modulated arc therapy (VMAT) and intensity-modulated radiation

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The dosimetric significance of using 10 MV photons for volumetric modulated arc therapy for post-prostatectomy irradiation of the prostate bed

of these studies show no clear benefit to using higher energy photons. Volumetric Modulated Arc Therapy (VMAT) has now begun to replace IMRT for treating prostate cancer, and numerous studies show that using VMAT instead of IMRT for prostate cancer results in dosimetric benefits, such as reduced treatment time and more dose sparing to OAR. 15 - 20 Therefore, it is relevant to investigate if using higher energy photons has greater potency than using the traditional 6 MV for VMAT. To deal with the issue of neutron contamination, 10 MV photons were used for this

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Image guided high-dose-rate brachytherapy versus volumetric modulated arc therapy for head and neck cancer: A comparative analysis of dosimetry for target volume and organs at risk

achieved higher dose conformity with better organs at risk (OARs) sparing compared to 3-dimensional conformal radiation therapy. 8 Volumetric modulated arc therapy (VMAT), an improved technique of IMRT offers reduced irradiation time compared to IMRT. 9 Nowadays IGBT meets the challenge of high precision EBRT such as VMAT, which is a non-invasive modality and does not require special skills to deliver a high conformal dose to the target volume while saving critical normal structures. To our knowledge no detailed dosimetric comparisons of IGBT with VMAT have so far been

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Advantages of VMAT-IMRT technique in nasopharyngeal cancer

intensity-modulated radiotherapy for nasopharyngeal carcinoma. Int J Radiat Oncol Biol Phys., 2000;48(2):329–337. 7. Otto K. - Volumetric modulated arc therapy: IMRT in a single gantry arc. Med Phys., 2008;35(1):310-317. 8. Zhao N., Yang R., Jiang Y., Tian S., Guo F., Wang J. - A Hybrid IMRT/VMAT Technique for the Treatment of Nasopharyngeal Cancer. BioMed Research International, 2015;(2015). Article ID 940102. 9. Verbakel W.F., Cuijpers J.P., Hoffmans D., Bieker M., Slotman B.J., Senan S. - Volumetric intensity-modulated arc therapy vs. conventional

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Comparison of hybrid volumetric modulated arc therapy (VMAT) technique and double arc VMAT technique in the treatment of prostate cancer

in 772 patients. Int J Radiat Oncol 2002; 53: 1111-6. 9. Zelefsky MJ, Chan H, Hunt M, Yamada Y, Shippy AM, Amols H. Long-term outcome of high dose intensity modulated radiation therapy for patients with clinically localized prostate cancer. J Urology 2006; 176: 1415-9. 10. Cozzi L, Dinshaw KA, Shrivastava SK, Mahantshetty U, Engineer R, Deshpande DD, et al. A treatment planning study comparing volumetric arc modulation with RapidArc and fixed field IMRT for cervix uteri radiotherapy. Radiother Oncol 2008; 89: 180-91. 11. Wolff D

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Volumetric modulated arc therapy dosimetry and treatment time compared with conventional intensity-modulated radiotherapy for unresectable cholangiocarcinoma

, Sanghangthum T, Israngkul Na Ayuthaya I, Shotelersuk K. Dosimetry of conformal dynamic arc radiotherapy and intensity modulated radiotherapy in unresectable cholangiocarcinoma. Asian Biomed. 2010; 4;131-9. 5. Verbakel WF, Cuijpers JP, Hoffmans D, Bieker M, Slotman BJ, Senan S. Volumetric intensity-modulated arc therapy vs. conventional IMRT in head-and-neck cancer: a comparative planning and dosimetric study. Int J Radiat Oncol Biol Phys. 2009; 74:252-9. 6. Popescu CC, Olivotto IA, Beckham WA, Ansbacher W, Zavgorodni S, Shaffer R, et al

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Evaluation of dosimetric effect caused by slowing with multi-leaf collimator (MLC) leaves for volumetric modulated arc therapy (VMAT)

Introduction Volumetric modulated arc therapy (VMAT) demands high level of precision and reliability from the linear accelerator (LINAC) control system because the gantry rotation is synchronized with multi-leaf collimator (MLC) movement for accurate dose delivery. 1 , 2 Highly modulated dose distribution commonly requires MLC leaves of high speed moving along the whole arc. 3 – 5 However, fast leaf motion during gantry rotation may be affected by interleaf friction or MLC motor problems that result in leaf position errors. 6 Wijesooriya et al and Ling

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Dosimetric comparison for volumetric modulated arc therapy and intensitymodulated radiotherapy on the left-sided chest wall and internal mammary nodes irradiation in treating post-mastectomy breast cancer

irradiation. Radiother Oncol 2010; 94: 235-40. 15. Zhang Q, Chen JY, Hu WG, Guo XM. Modified partially wide tangents technique in post-mastectomy radiotherapy for patients with left-sided breast cancer. Chin Med J (Engl) 2010; 123: 2825-31. 16. Palma D, Vollans E, James K, Nakano S, Moiseenko V, Shaffer R, et al. Volumetric modulated arc therapy for delivery of prostate radiotherapy: comparison with intensity-modulated radiotherapy and three-dimensional conformal radiotherapy. Int J Radiat Oncol Biol Phys 2008; 72: 996

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Dosimetric study of the protection level of the bone marrow in patients with cervical or endometrial cancer for three radiotherapy techniques - 3D CRT, IMRT and VMAT. Study protocol.

the adjuvant treatment of gynecologic malignancies: a comparative dosimetric study of dose-volume histograms. Gynecol Oncol. 2003;91(1):39-45. [7] Cozzi L, Dinshaw KA, Shrivastava SK, et al. Treatment planning study comparing volumetric arc modulation with RapidArc and fixed field IMRT for cervix uteri radiotherapy. Radiother Oncol. 2008;89(2):180-191. [8] Brixey CJ, Roeske JC, Lujan AE, et al. Impact of intensity modulated radiation therapy on acute hematologic toxicity in women with gynecologic malignancies. Int J Radiat Oncol Biol Phys. 2002; 54

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Study of impacts of different evaluation criteria on gamma pass rates in VMAT QA using MatriXX and EPID

References [1] Verbakel WF, Cuijpers J P, Hoffmans D, et al. Volumetric intensity-modulated arc therapy versus conventional IMRT in head-and-neck cancer: a comparative planning and dosimetric study. Int J Radiat Oncol Biol Phys. 2009;74(1):252–259. [2] Wolff D, Stieler F, Welzel G, et al. Volumetric modulated arc therapy (VMAT) versus serial tomotherapy, step-and-shoot IMRT and 3D-conformal RT for treatment of prostate cancer. Radiother Oncol. 2009;93(2):226–233. [3] Otto K. Volumetric modulated arc therapy: IMRT in a single gantry arc. Med Phys

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