Journal article
Clinical Implementation of Tangential Field Intensity Modulated Radiation Therapy (IMRT) Using Sliding Window Technique and Dosimetric Comparison with 3D Conformal Therapy (3DCRT) in Breast Cancer
Medical dosimetry : official journal of the American Association of Medical Dosimetrists, v 32(4), pp 299-304
2007
PMID: 17980832
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The purpose of this study was to evaluate the clinical implementation of tangential field IMRT using sliding window technique and to compare dosimetric parameters with 3-dimensional conformal radiation therapy (3DCRT). Twenty breast cancer patients were randomly selected for comparison of intensity modulated radiation therapy (IMRT)-based treatment plan with 3DCRT. Inverse treatment was performed using the sliding window technique, employing the Eclipse
® Planning System (version 7.1.59, Varian, Palo Alto, CA). The dosimetric parameters compared were V
95 (the percentage of target volume getting ≥95% of prescribed dose), V
105, V
110, and dose homogeneity index, DHI (percentage of target volume getting between 95% and 110% of prescribed dose). The mean V
95, DHI, V
105, and V
110 for target volume for IMRT vs. 3D were 90.6% (standard deviation [SD]: 3.2) vs. 91% (SD: 3.0), 87.7 (SD: 6.0) vs. 82.6 (SD: 7.8), 27.3% (SD: 20.3) vs. 49.4% (SD: 14.3), and 2.8 (SD: 5.6) vs. 8.4% (SD: 7.4), respectively. DHI was increased by 6.3% with IMRT compared to 3DCRT (
p < 0.05). The reductions of V
105 and V
110 for the IMRT compared to 3DCRT were 44.7% and 66.3%, respectively (
p < 0.01). The mean dose and V
30 for heart with IMRT were 2.3 (SD: 1.1) and 1.05 (SD: 1.5) respectively, which was a reduction by 6.8% and 7.9%, respectively, in comparison with 3D. Similarly, the mean dose and V
20 for the ipsilateral lung and the percentage of volume of contralateral volume lung receiving > 5% of prescribed dose with IMRT were reduced by 9.9%, 2.2%, and 35%, respectively. The mean of total monitor units used for IMRT and 3DCRT was about the same (397 vs. 387). The tangential field IMRT for intact breast using sliding window technique was successfully implemented in the clinic. We have now treated more than 1000 breast cancer patients with this technique. The dosimetric data suggest improved dose homogeneity in the breast and reduction in the dose to lung and heart for IMRT treatments, which may be of clinical value in potentially contributing to improved cosmetic results and reduced late treatment-related toxicity.
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Details
- Title
- Clinical Implementation of Tangential Field Intensity Modulated Radiation Therapy (IMRT) Using Sliding Window Technique and Dosimetric Comparison with 3D Conformal Therapy (3DCRT) in Breast Cancer
- Creators
- Raj N. Selvaraj - UPMC Hillman Cancer CenterSushil Beriwal - UPMC Hillman Cancer CenterRoya J. Pourarian - UPMC Hillman Cancer CenterRon J. Lalonde - Drug Development and DiscoveryAlex Chen - UPMC Hillman Cancer CenterKiran Mehta - UPMC Hillman Cancer CenterGwendolyn Brunner - UPMC Hillman Cancer CenterKathy A. Wagner - Drug Development and DiscoveryNing J. Yue - Rutgers Cancer Institute of New JerseySaiful M. Huq - UPMC Hillman Cancer CenterDwight E. Heron - UPMC Hillman Cancer Center
- Publication Details
- Medical dosimetry : official journal of the American Association of Medical Dosimetrists, v 32(4), pp 299-304
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Radiation Oncology (and Nuclear Medicine)
- Web of Science ID
- WOS:000251075200011
- Scopus ID
- 2-s2.0-35548940795
- Other Identifier
- 991021897259504721
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Oncology
- Radiology, Nuclear Medicine & Medical Imaging