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Practical Radiation Oncology

H Dahn, A McGibbon, D Bowes
PURPOSE: To measure burnout rates and resiliency scores in Canadian Oncology residents and to advance the knowledge regarding resiliency and wellness training in Canadian Oncology residency programs. METHODS AND MATERIAL: Online surveys was circulated to all Canadian Radiation Oncology, Medical Oncology and Hematology residents and program directors. Oncology resident burnout rates and resiliency scores were measured using the abbreviated Maslach Burnout Inventory (aMBI) and Connor-Davidson Resiliency scale (CD-RISC)...
August 30, 2018: Practical Radiation Oncology
Nancy El-Bared, Lorraine Portelance, Benjamin O Spieler, Deukwoo Kwon, Kyle R Padgett, Karen M Brown, Eric A Mellon
BACKGROUND: Magnetic resonance image guided (MRI-g) radiotherapy provides target and organs at risk (OARs) visualization allowing for daily online adaptive radiotherapy (OART). We hypothesized that MRI-g OART would improve OARs sparing and target coverage in patients with pancreatic cancer treated with stereotactic body radiotherapy (SBRT). METHODS: Ten patients received pancreas SBRT to a dose of 33-40 Gy in 5 fractions. The dose was prescribed to 90% coverage of the planning tumor volume at 100% isodose (PTV100)...
August 24, 2018: Practical Radiation Oncology
Nikhil Yegya-Raman, Meral Reyhan, Sinae Kim, Matthew P Deek, Ning Yue, Wei Zou, Jyoti Malhotra, Joseph Aisner, Salma K Jabbour
PURPOSE: To investigate the association between target volume margins and clinical outcomes for patients with inoperable non-small cell lung cancer (NSCLC) treated with concurrent chemoradiation therapy. METHODS: /Materials: We reviewed records of 82 patients with inoperable NSCLC treated from 2009-2016 with concurrent chemoradiation. All patients received positron emission tomography-based treatment planning, 4-dimensional computed tomography simulation to define an internal target volume, and daily cone beam computed tomography...
August 22, 2018: Practical Radiation Oncology
Baoshe Zhang, Sung-Woo Lee, Shifeng Chen, Jinghao Zhou, Karl Prado, Warren D'Souza, Byongyong Yi
PURPOSE: To develop action levels for re-planning to accommodate dosimetric variations resulting from anatomic changes during the course of treatments, using daily cone-beam computed tomography (CBCT). METHODS: Daily or weekly CBCT images of 20 patients (10 head and neck, 5 lung, and 5 prostate cancers) who underwent re-simulation by physicians' clinical decisions mainly from the comparison of CBCTs, were used to determine action levels. The first CBCT image acquired prior to the first treatment was used as the reference image to rule out the effects of dose inaccuracy from the CBCT...
August 21, 2018: Practical Radiation Oncology
Xiaoying Liang, Dandan Zheng, Maria Mamalui-Hunter, Stella Flampouri, Bradford S Hoppe, Nancy Mendenhall, Zuofeng Li
PURPOSE: Utilizing PTV to account for setup uncertainties in SBRT of lung cancer has been questioned, since a significant portion of the PTV contains low-density lung tissue. The purpose of this study is to: (1) investigate the feasibility of using robust optimization to account for setup uncertainties in VMAT plan for lung SBRT; and (2) evaluate the potential normal tissue-sparing benefit of a robust optimized plan compared to a conventional PTV-based optimized plan. METHOD AND MATERIALS: The study was carried out on both phantom and patient cases...
August 20, 2018: Practical Radiation Oncology
Satomi Shiraishi, Luis E Fong de Los Santos, John A Antolak, Kenneth R Olivier, Yolanda I Garces, Sean S Park, Michael P Grams
PURPOSE: To evaluate dose calculation accuracy for Eclipse AAA and Acuros XB algorithms for various lung tumor sizes, and to investigate dosimetric changes associated with treatment of regressing tumors. METHODS: A water phantom with cylindrical cork inserts (lung surrogates) was fabricated. Large (202 cm3 ), medium (54 cm3 ) and small (3 cm3 ) solid water tumors were implanted within cork inserts. A plain cork insert was used to simulate a lung without a tumor...
August 20, 2018: Practical Radiation Oncology
Shane R Stecklein, Simona F Shaitelman, Gildy V Babiera, Isabelle Bedrosian, Dalliah M Black, Matthew T Ballo, Isadora Arzu, Eric A Strom, Valerie K Reed, Tomas Dvorak, Benjamin D Smith, Wendy A Woodward, Karen E Hoffman, Pamela J Schlembach, Steve M Kirsner, Christopher L Nelson, Jinzhong Yang, William Guerra, Shiva Dibaj, Elizabeth S Bloom
OBJECTIVE: To prospectively characterize toxicity and cosmesis after accelerated partial breast irradiation (APBI) with 3D conformal radiotherapy (3D-CRT) or single-entry multilumen intracavitary brachytherapy. PATIENTS AND METHODS: Two hundred eighty-one patients with pTis, pT1N0, or pT2N0 (≤3.0 cm) breast cancer treated with segmental mastectomy were prospectively enrolled from December 2008 through August 2014. APBI was delivered using 3D-CRT (N=29) or with a SAVI® (N=176), Contura® (N=56), or MammoSite® (N=20) brachytherapy catheter...
August 17, 2018: Practical Radiation Oncology
Khaled Adil, Marija Popovic, Fabio L Cury, Sergio L Faria, Marie Duclos, Luis Souhami
PURPOSE: This study aimed to investigate 3 planning target volume (PTV) margin expansions and determine the most appropriate volume to be used in bladder preservation therapy when using daily cone beam computed tomography (CBCT). We aimed to establish whether a smaller PTV expansion is feasible without risking geographical miss. METHODS AND MATERIALS: The study included patients with bladder cancer who were treated with a hypofractionated course of radiation therapy delivered with intensity modulated radiation therapy...
August 7, 2018: Practical Radiation Oncology
John A Kalapurakal, Bryan Lee, Jonathan Bautista, Cynthia Rigsby, Irene Helenowski, Mahesh Gopalakrishnan
PURPOSE: Cardiac sparing whole lung (WL IMRT) has been shown to improve cardiac protection and lung volume dose coverage compared to standard anteroposterior techniques. This dosimetry study had 2 aims: 1). To determine the dosimetric advantages of a modified WL IMRT (M-WL IMRT) technique designed to reduce radiation exposure to the thyroid gland and breast tissues compared to the standard WL IMRT (S-WL IMRT) and 2). To determine the dosimetric advantages of M-WL IMRT and dosimetrically matched abdomen/flank RT fields designed to reduce normal tissue exposure compared to standard field matching techniques...
August 7, 2018: Practical Radiation Oncology
Skyler B Johnson, Jonathon Hung, Nirav Kapadia, Kevin S Oh, Michelle Kim, Daniel A Hamstra
PURPOSE: This study aimed to evaluate the impact on spine growth in children with medulloblastoma using either photon or electron craniospinal irradiation (CSI). METHODS AND MATERIALS: This was a single institution retrospective review of children who were treated with CSI for medulloblastoma. Spine growth was measured on magnetic resonance imaging scans at defined locations on the basis of a published predictive model of spine growth after CSI. Differences between spine growth in the anterior, middle, and posterior aspect of the designated vertebral segments were also assessed...
July 21, 2018: Practical Radiation Oncology
Dominique Mathieu, Vincent Cousineau Daoust, Marie-Pierre Campeau, Édith Filion, Laurent Bilodeau, Houda Bahig, David Roberge, Alexis Lenglet, Stéphane Bedwani
No abstract text is available yet for this article.
July 18, 2018: Practical Radiation Oncology
Steven M Nguyen, Alisha A Chlebik, Arthur J Olch, Kenneth K Wong
BACKGROUND: Noncoplanar radiation therapy techniques such as 4π have potential dosimetric advantages but introduce complexities in treatment delivery that increase the risk for collision. Direct or remote visual confirmation of clearance is a safeguard against collisions of the gantry, couch, and patient. With our institution's Varian TrueBeam system, we identified configurations that cannot be visualized with the included closed-circuit television cameras. At our practice, electronic, portal imaging device (EPID) collision risk also exists because of the routine deployment to capture exit-dose images for treatment quality assurance...
July 12, 2018: Practical Radiation Oncology
Suzanne B Evans
No abstract text is available yet for this article.
September 2018: Practical Radiation Oncology
Daniel J Lee, Daniel A Barocas, Zhiguo Zhao, Li-Ching Huang, Tatsuki Koyama, Matthew J Resnick, Ralph Conwill, Dan McCollum, Matthew R Cooperberg, Michael Goodman, Sheldon Greenfield, Ann S Hamilton, Mia Hashibe, Sherrie H Kaplan, Lisa E Paddock, Antoinette M Stroup, Xiao-Cheng Wu, David F Penson, Karen E Hoffman
PURPOSE: Quality measures represent the standards of appropriate treatment agreed upon by experts in the field and often supported by data. The extent to which providers in the community adhere to quality measures in radiation therapy (RT) is unknown. METHODS AND MATERIALS: The Comparative Effectiveness Analysis of Surgery and Radiation study enrolled men with clinically localized prostate cancer in 2011 and 2012. Patients completed surveys and medical records were reviewed...
September 2018: Practical Radiation Oncology
W Robert Lee
No abstract text is available yet for this article.
September 2018: Practical Radiation Oncology
Robert J Amdur, W Robert Lee
No abstract text is available yet for this article.
September 2018: Practical Radiation Oncology
Ashleigh P Shier, Plinio P Morita, Colleen Dickie, Mohammad Islam, Catherine M Burns, Joseph A Cafazzo
PURPOSE: As radiation therapy treatment grows more complex over time, treatment delivery has become more susceptible to adverse events and patient safety risks from use error. The radiation therapy monitoring and treatment delivery user interface explored in this study was redesigned using ecological interface design, a human factors engineering method, and evaluated to improve treatment safety. METHODS AND MATERIALS: An initial design concept was created based on previously completed analysis and informally evaluated in focus groups with radiation therapists...
September 2018: Practical Radiation Oncology
Meghan W Macomber, Stephanie K Schaub, Smith Apisarnthanarax
No abstract text is available yet for this article.
September 2018: Practical Radiation Oncology
Nicole Leung, Adela R Cardones, Nicole Larrier
No abstract text is available yet for this article.
September 2018: Practical Radiation Oncology
Paul E Wallner, Lisa A Kachnic, Anthony M Gerdeman
No abstract text is available yet for this article.
September 2018: Practical Radiation Oncology
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