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Auto planning

Elena Gallio, Francesca Romana Giglioli, Andrea Girardi, Alessia Guarneri, Umberto Ricardi, Roberto Ropolo, Riccardo Ragona, Christian Fiandra
PURPOSE: Automated treatment planning is a new frontier in radiotherapy. The Auto-Planning module of the Pinnacle3 treatment planning system (TPS) was evaluated for liver stereotactic body radiation therapy treatments. METHODS: Ten cases were included in the study. Six plans were generated for each case by four medical physics experts. The first two planned with Pinnacle TPS, both with manual module (MP) and Auto-Planning one (AP). The other two physicists generated two plans with Monaco TPS (VM)...
February 2018: Physica Medica: PM
Lu Guo, Ping Wang, Ranran Sun, Chengwen Yang, Ning Zhang, Yu Guo, Yuanming Feng
The diffusion and perfusion magnetic resonance (MR) images can provide functional information about tumour and enable more sensitive detection of the tumour extent. We aimed to develop a fuzzy feature fusion method for auto-segmentation of gliomas in radiotherapy planning using multi-parametric functional MR images including apparent diffusion coefficient (ADC), fractional anisotropy (FA) and relative cerebral blood volume (rCBV). For each functional modality, one histogram-based fuzzy model was created to transform image volume into a fuzzy feature space...
February 19, 2018: Scientific Reports
Jeff Sedita, Stefanie Perrella, Matt Morio, Michael Berbari, Jui-Shan Hsu, Eugene Saxon, Courtney Jarrahian, Annie Rein-Weston, Darin Zehrung
Despite limitations of glass packaging for vaccines, the industry has been slow to implement alternative formats. Polymer containers may address many of these limitations, such as breakage and delamination. However, the ability of polymer containers to achieve cost of goods sold (COGS) and total cost of delivery (TCOD) competitive with that of glass containers is unclear, especially for cost-sensitive low- and lower-middle-income countries. COGS and TCOD models for oral and parenteral vaccine packaging formats were developed based on information from subject matter experts, published literature, and Kenya's comprehensive multiyear plan for immunization...
March 14, 2018: Vaccine
Darren J Mayne, Geoffrey G Morgan, Bin B Jalaludin, Adrian E Bauman
Walkability describes the capacity of the built environment to promote walking, and has been proposed as a potential focus for community-level mental health planning. We evaluated this possibility by examining the contribution of area-level walkability to variation in psychosocial distress in a population cohort at spatial scales comparable to those used for regional planning in Sydney, Australia. Data on psychosocial distress were analysed for 91,142 respondents to the 45 and Up Study baseline survey between January 2006 and April 2009...
February 6, 2018: International Journal of Environmental Research and Public Health
Anh H Le, Strahinja Stojadinovic, Robert Timmerman, Hak Choy, Romona L Duncan, Steve B Jiang, Arnold Pompos
PURPOSE: To demonstrate the feasibility of a real-time whole-brain radiation therapy (WBRT) workflow, taking advantage of contemporary radiation therapy capabilities and seeking to optimize clinical workflow for WBRT. METHODS AND MATERIALS: We developed a method incorporating the linear accelerator's on-board imaging system for patient simulation, used cone-beam computed tomography (CBCT) data for treatment planning, and delivered the first fraction of prescribed therapy, all during the patient's initial appointment...
December 28, 2017: International Journal of Radiation Oncology, Biology, Physics
Simon Dedman, Rick Officer, Maurice Clarke, David G Reid, Deirdre Brophy
[This corrects the article DOI: 10.1371/journal.pone.0188955.].
2018: PloS One
Li-Ping Yao, Ju Mei, Fang-Bao Ding, Li Zhang, Hui-Ming Li, Ming Ding, Xin Yang, Xiao-Ming Li, Kun Sun
To investigate roaming paths planning for diagnosis of congenital heart diseases (CHD) using a cardiovascular virtual endoscopy (VE) system. Forty children were enrolled. VE system was applied to support in establishing a diagnosis. Performance in diagnosing CHDs by CT, VE using automatically planned roaming paths (VE-auto, objects were treated as left heart system and right heart system), VE using manually planned paths (VE-manual), and VE using automatically planned path for left heart system and manually planned path for right heart system (VE-combined) were studied and compared...
January 23, 2018: Scientific Reports
Yangsen Cao, Xiaofei Zhu, Xiaoping Ju, Yongming Liu, Chunshan Yu, Yongjian Sun, Zhitao Dai, Xueling Guo, Huojun Zhang
BACKGROUND: To identify optimization of dose distributions of target volumes and decrease of radiation doses to normal tissues during stereotactic body radiation therapy (SBRT) for pancreatic cancer with dose-limiting auto-shells. METHODS: With the same prescription dose, dose constraints of normal organs and calculation algorithm, treatment plans of each eligible patient were re-generated with 3 shells, 5 shells and 7 shells, respectively. The prescription isodose line and beam number of each patient in 3-shell, 5-shell and 7-shell plan remained the same...
January 22, 2018: Radiation Oncology
Ivaylo B Mihaylov, Eric A Mellon, Raphael Yechieli, Lorraine Portelance
PURPOSE: Inverse planning is trial-and-error iterative process. This work introduces a fully automated inverse optimization approach, where the treatment plan is closely tailored to the unique patient anatomy. The auto-optimization is applied to pancreatic stereotactic body radiotherapy (SBRT). MATERIALS AND METHODS: The automation is based on stepwise reduction of dose-volume histograms (DVHs). Five uniformly spaced points, from 1% to 70% of the organ at risk (OAR) volumes, are used...
2018: PloS One
Mohammad Nabavi, Mehrnoosh Lavavpour, Saba Arshi, Mohammad Hasan Bemanian, Hossein Esmaeilzadeh, Rasool Molatefi, Mahsa Rekabi, Javad Ahmadian, Narges Eslami, Sima Shokri, Kian Darabi, Gholam Reza Sedighi, Morteza Fallahpour
Despite the increasing prevalence of anaphylaxis, there is little information about the characteristics and practice of healthcare providers in treating anaphylaxis, so this study was conducted to record the characteristics and therapeutic approaches of anaphylaxis from May 2012 until April 2015, the data of all patients diagnosed with anaphylaxis in the Allergy department of three referral university hospitals in Tehran, Iran were recorded. Thereafter, the demographics, clinical features, triggers and therapeutic approach were evaluated...
December 2017: Iranian Journal of Allergy, Asthma, and Immunology
Santhosh Kumar Devadas, Minal Khairnar, Sumathi S Hiregoudar, Shashank Ojha, Sachin Punatar, Alok Gupta, Anant Gokarn, Pallavi Bhole, Sadhana Kannan, Navin Khattry
Background: Stem cell units (SCUs) that are cryopreserved prior to both autologous and allogeneic hematopoietic stem cell transplants (for donor lymphocyte infusion) remain unused or partially used several times, and become an increased burden to blood banks/SCU repositories. Because of the scarcity of data regarding the duration for which the storage is useful, there is no general consensus regarding disposal of SCUs. Methods: We conducted a retrospective audit of SCU utilization in 435 patients who planned to undergo either autologous stem cell transplantation (auto-SCT) (N=239) or allogeneic stem cell transplantation (allo-SCT) (N=196) at a tertiary cancer care center between November 2007 to January 2015...
December 2017: Blood Research
Troy Long, Mingli Chen, Steve B Jiang, Weiguo Lu
We study threshold-driven optimization methodology for automatically generating a treatment plan that is motivated by a reference DVH for IMRT treatment planning. We present a framework for threshold-driven optimization for reference-based auto-planning (TORA). Commonly used voxel-based quadratic penalties have two components for penalizing under- and over-dosing of voxels: a reference dose threshold and associated penalty weight. Conventional manual- and auto-planning using such a function involves iteratively updating the preference weights while keeping the thresholds constant, an unintuitive and often inconsistent method for planning toward some reference DVH...
January 12, 2018: Physics in Medicine and Biology
James Marton, Aaron Yelowitz, Jeffery C Talbert
In 2012, Kentucky implemented Medicaid managed care statewide, auto-assigned enrollees to three plans, and allowed switching. Using administrative data, we find that the state's auto-assignment algorithm most heavily weighted cost-minimization and plan balancing, and placed little weight on the quality of the enrollee-plan match. Immobility - apparently driven by health plan inertia - contributed to the success of the cost-minimization strategy, as more than half of enrollees auto-assigned to even the lowest quality plans did not opt-out...
December 2017: Journal of Health Economics
Simon Dedman, Rick Officer, Maurice Clarke, David G Reid, Deirdre Brophy
BOOSTED REGRESSION TREES. EXCELLENT FOR DATA-POOR SPATIAL MANAGEMENT BUT HARD TO USE: Marine resource managers and scientists often advocate spatial approaches to manage data-poor species. Existing spatial prediction and management techniques are either insufficiently robust, struggle with sparse input data, or make suboptimal use of multiple explanatory variables. Boosted Regression Trees feature excellent performance and are well suited to modelling the distribution of data-limited species, but are extremely complicated and time-consuming to learn and use, hindering access for a wide potential user base and therefore limiting uptake and usage...
2017: PloS One
Elise M Pogson, Sankar Aruguman, Christian R Hansen, Michael Currie, Bradley M Oborn, Samuel J Blake, Josip Juresic, Cesar Ochoa, Jim Yakobi, Alicia Haman, Admir Trtovac, Martin Carolan, Lois Holloway, David I Thwaites
PURPOSE: To quantify the impact of simulated errors for nasopharynx radiotherapy across multiple institutions and planning techniques (auto-plan generated Volumetric Modulated Arc Therapy (ap-VMAT), manually planned VMAT (mp-VMAT) and manually planned step and shoot Intensity Modulated Radiation Therapy (mp-ssIMRT)). METHODS: Ten patients were retrospectively planned with VMAT according to three institution's protocols. Within one institution two further treatment plans were generated using differing treatment planning techniques...
October 2017: Physica Medica: PM
Yujie Zhang, Tingting Li, Han Xiao, Weixing Ji, Ming Guo, Zhaochong Zeng, Jianying Zhang
PURPOSE: To build a knowledge-based model of liver cancer for Auto-Planning, a function in Pinnacle, which is used as an automated inverse intensity modulated radiation therapy (IMRT) planning system. METHODS AND MATERIALS: Fifty Tomotherapy patients were enrolled to extract the dose-volume histograms (DVHs) information and construct the protocol for Auto-Planning model. Twenty more patients were chosen additionally to test the model. Manual planning and automatic planning were performed blindly for all twenty test patients with the same machine and treatment planning system...
November 15, 2017: Journal of Applied Clinical Medical Physics
Hua Chen, Hao Wang, Hengle Gu, Yan Shao, Xuwei Cai, Xiaolong Fu, Zhiyong Xu
This study aimed to investigate the dosimetric differences and lung sparing between volumetric-modulated arc therapy (VMAT) and intensity-modulated radiation therapy (IMRT) in the treatment of upper thoracic esophageal cancer with T3N0M0 for preoperative radiotherapy by auto-planning (AP). Sixteen patient cases diagnosed with upper thoracic esophageal cancer T3N0M0 for preoperative radiotherapy were retrospectively studied, and 3 plans were generated for each patient: full arc VMAT AP plan with double arcs, partial arc VMAT AP plan with 6 partial arcs, and conventional IMRT AP plan...
October 27, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
Hao Wang, Hua Chen, Hengle Gu, Yan Shao, Xuwei Cai, Xiaolong Fu, Zhiyong Xu
Intensity-modulated radiotherapy (IMRT) is an important technology in cancer radiotherapy. In the current planning system, such as in the Pinnacle(3) system, jaw positions are automatically set to cover all target volumes, and many medical centers in developing countries are not equipped with linear accelerators with a jaw tracing function. As solitary lesions are often located in patients, the resulting radiation leakage and transmission increase the dose exposure in surrounding critical organs, although blocked by multileaf collimator (MLC) leaves...
October 27, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
J M A M Kusters, K Bzdusek, P Kumar, P G M van Kollenburg, M C Kunze-Busch, M Wendling, T Dijkema, J H A M Kaanders
Correction to: Strahlenther Onkol 2017 Unfortunately, parts of the 'Materials and Methods section' and a sentence in the 'Discussion section' had to be corrected.On page 3, left column, the complete first paragraph was corrected and now reads as follows:Auto-P.
December 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
J Krayenbuehl, M Di Martino, M Guckenberger, N Andratschke
BACKGROUND: Whole-brain radiation therapy (WBRT) with hippocampus sparing (HS) has been investigated by the radiation oncology working group (RTOG) 0933 trial for patients with multiple brain metastases. They showed a decrease of adverse neurocognitive effects with HS WBRT compared to WBRT alone. With the development of automated treatment planning system (aTPS) in the last years, a standardization of the plan quality at a high level was achieved. The goal of this study was to evaluate the feasibility of using an aTPS for the treatment of HS WBRT and see if the RTOG 0933 dose constraints could be achieved and improved...
October 2, 2017: Radiation Oncology
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