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Delineation radiotherapy

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https://www.readbyqxmd.com/read/27930548/primary-central-nervous-system-alk-positive-anaplastic-large-cell-lymphoma-in-an-adult-a-rare-case-report
#1
Xiaoqin Dong, Jun Li, Na Huo, Yan Wang, Zhao Wu, Xiaohong Lin, Hong Zhao
RATIONALE: Anaplastic large cell lymphoma (ALCL) is an aggressive non-Hodgkin lymphoma. It mostly invades lymph nodes with extranodal involvement observed in the soft tissue, bone, and skin. PATIENT CONCERNS: We report a 34-year-old Chinese male patient who presented with headache, diplopia, and vomit. Cerebrospinal fluid (CSF) analysis via lumbar puncture showed elevated CSF pressure, elevated CSF protein concentrations, decreased CSF glucose and chloride concentration significantly, and pleocytosis of 68 to 350 × 10/L, in which lymphocytes and monocytes were predominant...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27914779/what-do-radiation-oncologists-require-for-future-advancements-in-lung-sbrt
#2
REVIEW
Umberto Ricardi, Serena Badellino, Andrea Riccardo Filippi
Stereotactic Body Radiotherapy (SBRT) is a well established therapeutic option for patients affected with peripheral early stage non-small cell lung cancer (NSCLC), given the positive clinical evidence accumulated so far on its efficacy and safety. SBRT is regarded as the best choice for inoperable patients, and could also be offered as an alternative to surgery to selected operable patients. More recently, its use for lung metastases progressively increased, and SBRT is now regarded as a low toxic and highly effective local therapy for lung oligometastases from different primary tumors, especially colorectal cancer...
November 30, 2016: Physica Medica: PM
https://www.readbyqxmd.com/read/27911139/volumetric-response-of-intracranial-meningioma-after-photon-or-particle-irradiation
#3
Petra Mozes, Jan Oliver Dittmar, Daniel Habermehl, Eric Tonndorf-Martini, Katalin Hideghety, Anne Dittmar, Jürgen Debus, Stephanie E Combs
BACKGROUND: Meningiomas are usually slow growing, well circumscribed intracranial tumors. In symptom-free cases observation with close follow-up imaging could be performed. Symptomatic meningiomas could be surgically removed and/or treated with radiotherapy. The study aimed to evaluate the volumetric response of intracranial meningiomas at different time points after photon, proton, and a mixed photon and carbon ion boost irradiation. PATIENTS AND METHODS: In Group A 38 patients received proton therapy (median dose: 56 GyE in 1...
December 2, 2016: Acta Oncologica
https://www.readbyqxmd.com/read/27908181/defining-and-assessing-an-anisotropic-delineation-margin-for-modern-radiotherapy
#4
L R Bell, E M Pogson, P E Metcalfe, L C Holloway
PURPOSE: Uncertainty in target volume delineation for modern radiotherapy impacts dosimetry and patient outcomes. Delineation uncertainty is generally overlooked in practice as a source of error, potentially since historically, other uncertainties have been the main focus. This work defined and assessed an anisotropic delineation margin in both polar and spherical coordinate systems in order to account for the spatially varying nature of this uncertainty using a whole breast radiotherapy cohort as a proof of concept...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27900019/the-relationship-between-tumor-volume-changes-and-serial-plasma-osteopontin-detection-during-radical-radiotherapy-of-non-small-cell-lung-cancer
#5
Christian Ostheimer, Franziska Schweyer, Thomas Reese, Matthias Bache, Dirk Vordermark
The prognostic quality of increased osteopontin (OPN) plasma levels has been demonstrated for the chemotherapy and surgery of lung cancer. There is also evidence in the literature that tumor volume impacts prognosis in definitive radiotherapy (RT) of (lung) cancer. We previously demonstrated that elevated plasma levels of OPN before, and increasing OPN plasma levels after RT significantly correlate with survival and outcome after curative-intent RT of non-small-cell lung cancer (NSCLC). Tumor volume was also associated with prognosis...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27897274/modelling-tumour-volume-variations-in-head-and-neck-cancer-magnetic-resonance-imaging-contribution-for-patients-undergoing-induction-chemotherapy
#6
N Dinapoli, T Tartaglione, F Bussu, R Autorino, F Miccichè, M Sciandra, E Visconti, C Colosimo, G Paludetti, V Valentini
Primary tumour volume evaluation has predictive value for estimating survival outcomes. Using volumetric data acquired by MRI in patients undergoing induction chemotherapy (IC) these outcomes were estimated before the radiotherapy course in head and neck cancer (HNC) patients. MRI performed before and after IC in 36 locally advanced HNC patients were analysed to measure primary tumour volume. The two volumes were correlated using the linear-log ratio (LLR) between the volume in the first MRI and the volume in the second...
November 29, 2016: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/27895682/development-and-clinical-implementation-of-a-new-template-for-mri-based-intracavitary-interstitial-gynecologic-brachytherapy-for-locally-advanced-cervical-cancer-from-ct-based-mupit-to-the-mri-compatible-template-benidorm-ten-years-of-experience
#7
Silvia Rodríguez Villalba, Jose Richart Sancho, Antonio Otal Palacín, Jose Perez-Calatayud, Manuel Santos Ortega
PURPOSE: To study outcome and toxicity in 59 patients with locally advanced cervix carcinoma treated with computed tomography (CT)-based Martinez universal perineal interstitial template (MUPIT) and the new magnetic resonance imaging (MRI)-compatible template Benidorm (TB). MATERIAL AND METHODS: From December 2005 to October 2015, we retrospectively analyzed 34 patients treated with MUPIT and 25 treated with the TB. Six 4 Gy fractions were prescribed to the clinical target volume (CTV) combined with external beam radiotherapy (EBRT)...
October 2016: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/27887643/distribution-of-fdg-avid-nodes-in-esophageal-cancer-implications-for-radiotherapy-target-delineation
#8
Brandon Garcia, Karyn A Goodman, Lajhem Cambridge, Mark Dunphy, Abraham J Wu
PURPOSE: Clinical target volumes (CTV) for radiotherapy (RT) in esophageal cancer (EC) are based on standard expansions of primary tumor volume. Data is needed to define regions at highest risk for occult disease, based on histology and location of the primary tumor. We therefore reviewed PET scans in EC patients to characterize the location of FDG-avid lymph node metastases (LNM). MATERIALS AND METHODS: We identified 473 EC patients with reviewable pre-treatment PET-CT scans...
November 25, 2016: Radiation Oncology
https://www.readbyqxmd.com/read/27866849/inter-observer-variation-in-delineating-the-coronary-arteries-as-organs-at-risk
#9
Anna-Karin Wennstig, Hans Garmo, Per Hållström, Petra Witt Nyström, Per Edlund, Carl Blomqvist, Malin Sund, Greger Nilsson
PURPOSE: To determine the inter-observer variation in delineating the coronary arteries as organs at risk (OAR) in breast cancer (BC) radiotherapy (RT) and how this variation affects the estimated coronary artery radiation dose. METHOD: Delineation of the left main and the left anterior descending coronary artery (LMCA and LAD), and the right coronary artery (RCA), by using the heart atlas by Feng et al., was performed by three radiation oncologists in 32 women who had received adjuvant RT for BC...
November 17, 2016: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27863962/understanding-the-impact-of-pelvic-organ-motion-on-dose-delivered-to-target-volumes-during-imrt-for-cervical-cancer
#10
Gemma Eminowicz, Vasilis Rompokos, Christopher Stacey, Lisa Hall, Mary McCormack
BACKGROUND: Advanced radiotherapy techniques reduce normal tissue dose by conforming closely to target volumes. In cervical cancer radiotherapy, organ filling affects clinical target volume (CTV; cervix, uterus) position. This study estimates the dosimetric effect of this primary CTV position variation during chemoradiation. METHODS/MATERIALS: Twice weekly cone-beam computed tomography (CBCT) images of ten patients undergoing cervical chemoradiation were retrospectively analysed...
November 16, 2016: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27863010/survey-of-image-guided-radiotherapy-use-in-australia
#11
Vikneswary Batumalai, Lois Charlotte Holloway, Shivani Kumar, Kylie Dundas, Michael Geoffrey Jameson, Shalini Kavita Vinod, Geoff P Delaney
INTRODUCTION: This study aimed to evaluate the current use of imaging technologies for planning and delivery of radiotherapy (RT) in Australia. METHODS: An online survey was emailed to all Australian RT centres in August 2015. The survey inquired about imaging practices during planning and treatment delivery processes. Participants were asked about the types of image-guided RT (IGRT) technologies and the disease sites they were used for, reasons for implementation, frequency of imaging and future plans for IGRT use in their department...
November 9, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27858544/current-role-of-surgery-in-the-management-of-oropharyngeal-cancer
#12
Meghan T Turner, J Kenneth Byrd, Robert L Ferris
The 1990s saw an increased use of chemoradiotherapy protocols, commonly referred to as organ-sparing therapy, for the treatment of oropharyngeal cancer after the Groupe d'Oncologie Radiothérapie Tête et Cou trial. Since that time, human papillomavirus-associated oropharyngeal squamous cell carcinoma has been identified as a unique disease, with improved survival regardless of treatment modality. The improved outcomes of this population has led to re-evaluation of treatment paradigms in the past decade, with a desire to spare young, human papillomavirus-positive patients the treatment-related toxicities of chemoradiotherapy and to use new minimally invasive surgical techniques to improve outcomes...
November 2016: Journal of Oncology Practice
https://www.readbyqxmd.com/read/27843735/interhemispheric-difference-images-from-postoperative-diffusion-tensor-imaging-of-gliomas
#13
Robert Kosztyla, Stefan A Reinsberg, Vitali Moiseenko, Brian Toyota, Alan Nichol
Introduction Determining the full extent of gliomas during radiotherapy planning can be challenging with conventional T1 and T2 magnetic resonance imaging (MRI). The purpose of this study was to develop a method to automatically calculate differences in the fractional anisotropy (FA) and mean diffusivity (MD) values in target volumes obtained with diffusion tensor imaging (DTI) by comparing with values from anatomically homologous voxels on the contralateral side of the brain. Methods Seven patients with a histologically confirmed glioma underwent postoperative radiotherapy planning with 1...
October 5, 2016: Curēus
https://www.readbyqxmd.com/read/27834628/consensus-guidelines-for-postoperative-stereotactic-body-radiation-therapy-for-spinal-metastases-results-of-an-international-survey
#14
Kristin J Redmond, Simon S Lo, Scott G Soltys, Yoshiya Yamada, Igor J Barani, Paul D Brown, Eric L Chang, Peter C Gerszten, Samuel T Chao, Robert J Amdur, Antonio A F De Salles, Matthias Guckenberger, Bin S Teh, Jason Sheehan, Charles R Kersh, Michael G Fehlings, Moon-Jun Sohn, Ung-Kyu Chang, Samuel Ryu, Iris C Gibbs, Arjun Sahgal
OBJECTIVE Although postoperative stereotactic body radiation therapy (SBRT) for spinal metastases is increasingly performed, few guidelines exist for this application. The purpose of this study is to develop consensus guidelines to promote safe and effective treatment for patients with spinal metastases. METHODS Fifteen radiation oncologists and 5 neurosurgeons, representing 19 centers in 4 countries and having a collective experience of more than 1300 postoperative spine SBRT cases, completed a 19-question survey about postoperative spine SBRT practice...
November 11, 2016: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/27829431/radiomics-based-targeted-radiotherapy-planning-rad-trap-a-computational-framework-for-prostate-cancer-treatment-planning-with-mri
#15
Rakesh Shiradkar, Tarun K Podder, Ahmad Algohary, Satish Viswanath, Rodney J Ellis, Anant Madabhushi
BACKGROUND: Radiomics or computer - extracted texture features have been shown to achieve superior performance than multiparametric MRI (mpMRI) signal intensities alone in targeting prostate cancer (PCa) lesions. Radiomics along with deformable co-registration tools can be used to develop a framework to generate targeted focal radiotherapy treatment plans. METHODS: The Rad-TRaP framework comprises three distinct modules. Firstly, a module for radiomics based detection of PCa lesions on mpMRI via a feature enabled machine learning classifier...
November 10, 2016: Radiation Oncology
https://www.readbyqxmd.com/read/27823640/impact-of-pet-ct-on-radiation-treatment-in-patients-with-esophageal-cancer-a-systematic-review
#16
REVIEW
Jing Lu, Xiang-Dong Sun, Xi Yang, Xin-Yu Tang, Qin Qin, Hong-Cheng Zhu, Hong-Yan Cheng, Xin-Chen Sun
PURPOSE: With the advances in radiotracers, positron emission tomography/computed tomography (PET/CT) is recognized as a useful adjunct to anatomic imaging with CT, MRI and endoscopic ultrasonography (EUS). The objective of this review was to comprehensively analyze the roles of PET/CT for the radiotherapy of esophageal cancer. METHODS: In this review, we focused on issues concerning the application of PET/CT in TNM staging, target volume delineation and response to therapy, both for the primary tumor and regional lymph nodes...
November 2016: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/27815039/standardisation-of-target-volume-delineation-for-carotid-sparing-intensity-modulated-radiotherapy-in-early-glottis-cancer
#17
D M Gujral, M Long, J W G Roe, K J Harrington, C M Nutting
AIMS: Recently, carotid-sparing intensity-modulated radiotherapy (IMRT) for early laryngeal glottis (T1/T2N0M0) cancer has generated interest in the hope of avoiding long-term carotid toxicity, as well as concerns relating to geographical misses and long-term normal tissue toxicity. The aim of this review was to summarise the current literature on carotid-sparing IMRT for early glottis cancer, with particular focus on definitions of target volumes and the carotid arteries as organs at risk...
November 1, 2016: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/27811130/impact-of-neuroradiology-based-peer-review-on-head-and-neck-radiotherapy-target-delineation
#18
S Braunstein, C M Glastonbury, J Chen, J M Quivey, S S Yom
BACKGROUND AND PURPOSE: While standard guidelines assist in target delineation for head and neck radiation therapy planning, the complex anatomy, varying patterns of spread, unusual or advanced presentations, and high risk of treatment-related toxicities produce continuous interpretive challenges. In 2007, we instituted weekly treatment planning quality assurance rounds as a joint enterprise of head and neck radiation oncology and neuroradiology. Here we describe its impact on head and neck radiation therapy target delineation...
November 3, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27785048/recurrence-pattern-of-squamous-cell-carcinoma-in-the-midthoracic-esophagus-implications-for-the-clinical-target-volume-design-of-postoperative-radiotherapy
#19
Xiaoli Wang, Yijun Luo, Minghuan Li, Hongjiang Yan, Mingping Sun, Tingyong Fan
BACKGROUND: Postoperative radiotherapy has shown positive efficacy in lowering the recurrence rate and improving the survival rate for patients with esophageal squamous cell carcinoma (ESCC). However, controversies still exist about the postoperative prophylactic radiation target volume. This study was designed to analyze the patterns of recurrence and to provide a reference for determination of the postoperative radiotherapy target volume for patients with midthoracic ESCC. PATIENTS AND METHODS: A total of 338 patients with recurrent or metastatic midthoracic ESCC after radical surgery were retrospectively examined...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27782717/quantitative-assessment-of-biliary-stent-artifacts-on-mr-images-potential-implications-for-target-delineation-in-radiotherapy
#20
Oliver J Gurney-Champion, Thijs Bruins Slot, Eelco Lens, Astrid van der Horst, Remy Klaassen, Hanneke W M van Laarhoven, Geertjan van Tienhoven, Jeanin E van Hooft, Aart J Nederveen, Arjan Bel
PURPOSE: Biliary stents may cause susceptibility artifacts, gradient-induced artifacts, and radio frequency (RF) induced artifacts on magnetic resonance images, which can hinder accurate target volume delineation in radiotherapy. In this study, the authors investigated and quantified the magnitude of these artifacts for stents of different materials. METHODS: Eight biliary stents made of nitinol, platinum-cored nitinol, stainless steel, or polyethylene from seven vendors, with different lengths (57-98 mm) and diameters (3...
October 2016: Medical Physics
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