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3-D Conformal Radiotherapy

Rong Wang, Amer M Zeidan, James B Yu, Pamela R Soulos, Amy J Davidoff, Steven D Gore, Scott F Huntington, Cary P Gross, Xiaomei Ma
BACKGROUND: To understand the impact of radiotherapy on the development of myelodysplastic syndromes (MDS) and acute myeloid leukemia (AML) among elderly prostate cancer patients. METHODS: We performed a retrospective cohort study of elderly prostate cancer patients diagnosed during 1999-2011 by using the National Cancer Institute's Surveillance, Epidemiology and End Results-Medicare linked database. Competing risk analyses adjusting for patient characteristics were conducted to assess the impact of radiotherapy on the development of subsequent MDS/AML, compared with surgery...
November 21, 2016: Prostate
Ee Siang Choong, George Hruby, Jean Yang, Carol Kwong, Nitya Patanjali
AIM: In prostate cancer, fiducial marker image-guided radiotherapy (FMIGRT) allows correction of setup errors and interfraction physiological motion resulting in improved accuracy of target and sparing of at risk organs. We aim to report outcomes and toxicities observed in patients treated with dose escalation to 78Gy with FMIGRT in our center. METHODS AND MATERIALS: Retrospective review of consecutive patients with histologically confirmed T1-4N0M0 localized prostate cancer treated with dose escalation to 78Gy with FMIGRT in our center...
November 10, 2016: Asia-Pacific Journal of Clinical Oncology
Gopa Ghosh, Ramanjis Tallari, Anupam Malviya
INTRODUCTION: Role of radiotherapy in comprehensive management of head and neck cancer for achieving tumour control and organ preservation is now well established and radiotherapy is routinely used in adjuvant setting after surgery, concurrently with chemotherapy or targeted agents and for palliation. Development of linear accelerator with Multileaf Collimator (MLC) have revolutionized radiation delivery techniques, allowing conformal and Intensity Modulated Radiotherapy (IMRT) to deliver highly conformal sculpted radiation dose to a very complex structure with improved sparing of adjoining critical structures like salivary glands, spinal cord, eyes, brainstem and larynx amounting to better therapeutic gain...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
Kemal Ekici, Eda K Pepele, Bahaddin Yaprak, Oztun Temelli, Aysun F Eraslan, Nadir Kucuk, Ayse Y Altınok, Pelin A Sut, Ozlem D Alpak, Cemil Colak, Alpaslan Mayadagli
Various radiotherapy planning methods for T1N0 laryngeal cancer have been proposed to decrease normal tissue toxicity. We compare helical tomotherapy (HT), linac-based intensity-modulated radiation therapy (IMRT), volumetric-modulated arc therapy (VMAT), and 3-D conformal radiotherapy (3D-CRT) techniques for T1N0 laryngeal cancer. Overall, 10 patients with T1N0 laryngeal cancer were selected and evaluated. Furthermore, 10 radiotherapy treatment plans have been created for all 10 patients, including HT, IMRT, VMAT, and 3D-CRT...
October 17, 2016: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
Antonin Levy, Christophe Massard, Jean-Charles Soria, Eric Deutsch
PURPOSE: To assess preliminary safety and efficacy results of the anti-programmed cell death ligand-1 (anti-PD-L1) durvalumab in combination with radiotherapy (RT) in an expansion cohort of patients included in a phase 1/2 trial at our institution. PATIENTS AND METHODS: Data from patients who received concurrent palliative RT with durvalumab (10 mg/kg every 2 weeks via intravenous infusion) were analysed in terms of safety (CTCAE v4.0) and efficacy (RECIST v1.1 and tumour growth rate [TGR])...
November 2016: European Journal of Cancer
J B Wang, W Jiang, Z Ji, J Z Cao, L P Liu, Y Men, C Xu, X Z Wang, Z G Hui, J Liang, J M Lyu, Z M Zhou, Z F Xiao, Q F Feng, D F Chen, H X Zhang, W B Yin, L H Wang
OBJECTIVE: This study aimed to evaluate the impact of technical advancement of radiation therapy in patients with LA-NSCLC receiving definitive radiotherapy (RT). METHODS: Patients treated with definitive RT (≥50 Gy) between 2000 and 2010 were retrospectively reviewed. Overall survival (OS), cancer specific survival (CSS), locoregional progression-free survival (LRPFS), distant metastasis-free survival (DMFS) and progression-free survival (PFS) were calculated and compared among patients irradiated with different techniques...
August 2016: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
Lin Xiao, Xin Yu, Yujia Zhu, Weiwei Xiao, Zhifan Zeng, Mengzhong Liu, Rong Zhang, Yuanhong Gao
OBJECTIVE: To compare the short-term efficacy and treatment-related adverse reaction between preoperative three dimensional conformal radiotherapy (3D-CRT) and volumetric modulated arc therapy (VMAT) concurrently combined with chemotherapy in the treatment of locally advanced rectal carcinoma (LARC). METHODS: Clinical data of 334 patients with LARC undergoing preoperative 3D-CRT(172 cases) or VMAT(162 cases) with concurrent Xelox chemotherapy (main protocol: capecitabine plus oxaliplatin) and surgery in Sun Yat-sen University Cancer Center from May 2007 to April 2013 were retrospectively analyzed...
July 2016: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
Stimato Gerardina, Ippolito Edy, Silipigni Sonia, Di Venanzio Cristina, Rinaldi Carla Germana, Gaudino Diego, Fiore Michele, Trodella Lucio, D'Angelillo Rolando Maria, Ramella Sara
OBJECTIVE: To develop an alternative three-dimensional treatment plan with standardized fields class solution for whole-breast radiotherapy in patients with large/pendulous breast and/or high body mass index (BMI). METHODS: Two treatment plans [tangential fields and standardized five-fields technique (S5F)] for a total dose of 50 Gy/25 fractions were generated for patients with large breasts [planning target volume (PTV) >1000 cm(3) and/or BMI >25 kg m(-2)], supine positioned...
September 2016: British Journal of Radiology
S Adeberg, S B Harrabi, N Bougatf, D Bernhardt, J Rieber, S A Koerber, M Syed, T Sprave, A Mohr, A Abdollahi, T Haberer, S E Combs, K Herfarth, J Debus, S Rieken
PURPOSE: The prognosis for high-grade glioma (HGG) patients is poor; thus, treatment-related side effects need to be minimized to conserve quality of life and functionality. Advanced techniques such as proton radiation therapy (PRT) and volumetric-modulated arc therapy (VMAT) may potentially further reduce the frequency and severity of radiogenic impairment. MATERIALS AND METHODS: We retrospectively assessed 12 HGG patients who had undergone postoperative intensity-modulated proton therapy (IMPT)...
June 22, 2016: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
Malcolm D Mattes, Ying Zhou, Sean L Berry, Christopher A Barker
PURPOSE: Radiation therapy targeting axilla and groin lymph nodes improves regional disease control in locally advanced and high-risk skin cancers. However, trials generally used conventional two-dimensional radiotherapy (2D-RT), contributing towards relatively high rates of side effects from treatment. The goal of this study is to determine if three-dimensional conformal radiation therapy (3D-CRT), intensity-modulated radiation therapy (IMRT), or volumetric-modulated arc therapy (VMAT) may improve radiation delivery to the target while avoiding organs at risk in the clinical context of skin cancer regional nodal irradiation...
June 2016: Radiation Oncology Journal
V Stankovic, Z Džamic, T Pekmezovic, D K Tepavcevic, M Dozic, M Saric, S Vuckovic, M Nikitovic
AIM: Our aim was to estimate the incidence of acute and late genitourinary toxicity in patients treated with three-dimensional conformal radiotherapy (3DCRT) for localised prostate cancer and to estimate the possible influence of individual and clinical characteristics. MATERIALS AND METHODS: Between September 2009 and September 2013, 225 patients with localised prostate cancer were treated with 3DCRT. Ninety-four patients with an estimated risk of lymph node involvement ≤15%, according to the Roach formula, were evaluated in this study...
September 2016: Clinical Oncology: a Journal of the Royal College of Radiologists
A Gulia, F D Patel, C Santam, R Bhavana, K Reena, S C Sharma
BACKGROUND: Although conventional four- field radiotherapy based on bony landmarks has been traditionally used, areas of geographical miss due to individual variation in pelvic anatomy have been identified with advanced imaging techniques. AIMS: The primary aim of this study is to evaluate the geographical miss in patientswhen using the conventional four-field planningplanning and to find out the impact of 3-D conformal CT based in patients with locally advanced carcinoma cervix...
January 2016: Indian Journal of Cancer
Maria Carmen De Santis, Francesca Bonfantini, Michela Dispinzieri, Silvia Meroni, Barbara Diletto, Elisa D Mantero, Marzia Franceschini, Fulvia Soncini, Serena Di Cosimo, Vito Cosentino, Emanuele Pignoli, Laura Lozza
PURPOSE: To evaluate the dosimetric coverage of axillary levels I, II, and III obtained with standard whole breast irradiation in 1 to 2 positive sentinel lymph nodes (SLNs) patients not submitted to axillary lymph nodes dissection (ALND), and to compare the lymph nodes areas coverage obtained with 3D conformal radiation therapy, intensity-modulated radiotherapy (IMRT), and volumetric modulated arc therapy (VMAT). METHODS: Patients with 1 to 2 positive SLNs undergoing breast-conserving therapy, without ALND, were included in the analysis...
August 3, 2016: Tumori
L Jin, R Wang, S Jiang, J Yue, T Liu, X Dou, K Zhu, R Feng, X Xu, D Chen, Y Yin
PURPOSE: We compared dosimetry and clinical toxicity for 3-dimensional conformal radiotherapy (3D-crt), intensity-modulated radiotherapy (imrt), and RapidArc (Varian Medical Systems, Palo Alto, CA, U.S.A.) in locally advanced pancreatic cancer (lapcc). We hypothesized that the technique with better sparing of organs at risk (oars) and better target dose distributions could lead to decreased clinical toxicity. METHODS: The study analyzed 280 patients with lapcc who had undergone radiotherapy...
February 2016: Current Oncology
D Khosla, F D Patel, A K Shukla, B Rai, A S Oinam, S C Sharma
BACKGROUND: To compare dosimetric parameters of intensity-modulated radiation therapy (IMRT) with 3D conformal radiotherapy (3DCRT) in post-operative patients of vulvar cancer and to assess clinical outcome and toxicity with IMRT. MATERIALS AND METHODS: A total of 8 post-operative patients of vulvar cancer were treated with IMRT. All patients were also planned by 3DCRT for comparison with IMRT. The two plans were compared in terms of conformity index, homogeneity index, tumor control probability (TCP) and normal tissue complication probability (NTCP) for the planning target volume and organs at risk (OAR)...
October 2015: Indian Journal of Cancer
R White, D Woolf, S Li, R Alonzi, P Osler, P Hoskin, R Hughes
BACKGROUND: Hypofractionated radiotherapy in the radical treatment of localized prostate cancer has potential biological advantages relative to conventional fractionation. We report prospectively collected toxicity data from a cohort of patients treated with a 3D conformal technique (3DCRT). MATERIALS AND METHODS: 90 patients receiving curative intent hypofractionated radiotherapy with 57Gy in 19 daily fractions over 3.8 weeks were evaluated prospectively for the development of radiation related toxicity over a 3 year period...
October 2015: Indian Journal of Cancer
Carsten Nieder, Kirsten Marienhagen, Roy M Kristensen, Torbjørn Sørbye, Lars Hoem
Salvage radiotherapy for post-prostatectomy biochemical recurrence does not always control the disease. It would be useful to identify patients who would not benefit from radiotherapy to the prostate bed prior to making treatment recommendations. One such group of patients is those who experience continuously rising prostate-specific antigen (PSA) despite radiotherapy. The purpose of this study was to identify risk factors for continuous PSA increase and the pattern of radiological relapse during follow-up...
February 2016: Oncology Letters
Teresa S Finnegan, Neal H Bhatt, Joseph N Shaughnessy, Cesar Perez, Rebecca Redman, Craig Silverman, Jeffrey Bumpous, Kevin Potts, Neal E Dunlap
BACKGROUND: Effective palliation in patients with locally advanced head and neck cancer is important. Cyclical hypofractionated radiotherapy (Quad Shot) is a short-course palliative regimen with good patient compliance, low rates of acute toxicity, and delayed late fibrosis. OBJECTIVE: To review use of the Quad Shot technique at our institution in order to quantify the palliative response in locally advanced head and neck cancer. METHODS: The medical records of 70 patients with head and neck squamous cell carcinoma who had been treated with the Quad Shot technique were analyzed retrospectively (36 had been treated with intensity-modulated radiation therapy and 34 with 3-D conformal radiotherapy)...
January 2016: Journal of Community and Supportive Oncology
T E Brown, V Getliffe, M D Banks, B G M Hughes, C Y Lin, L M Kenny, J D Bauer
BACKGROUND/OBJECTIVES: Evidence-based practice guidelines are available to assist in the decision making for nutrition interventions in patients with head and neck cancer. Re-assessment of guideline recommendations is important with changing demographics, new treatment regimens, advancing radiotherapy techniques, such as helical intensity-modulated radiotherapy, and the emergence of new literature. The aim of this study was to validate the updated high-risk category definition in our local hospital protocol for the swallowing and nutrition management of patients with head and neck cancer to determine the ongoing predictive ability for identifying proactive gastrostomy requirement in a new cohort...
May 2016: European Journal of Clinical Nutrition
Akın Öğretici, Uğur Akbaş, Canan Köksal, Hatice Bilge
The aim of this research was to investigate the fetal doses of pregnant patients undergoing conformal radiotherapy or intensity-modulated radiation therapy (IMRT) for breast cancers. An Alderson Rando phantom was chosen to simulate a pregnant patient with breast cancer who is receiving radiation therapy. This phantom was irradiated using the Varian Clinac DBX 600 system (Varian Medical System, Palo Alto, CA) linear accelerator, according to the standard treatment plans of both three-dimensional conformal radiation therapy (3-D CRT) and IMRT techniques...
2016: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
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