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Radiation Oncology

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https://www.readbyqxmd.com/read/29157271/comparison-of-neoadjuvant-chemoradiation-with-carboplatin-paclitaxel-or-cisplatin-5-fluoruracil-in-patients-with-squamous-cell-carcinoma-of-the-esophagus
#1
Stefan Münch, Steffi U Pigorsch, Marcus Feith, Julia Slotta-Huspenina, Wilko Weichert, Helmut Friess, Stephanie E Combs, Daniel Habermehl
PURPOSE: Neoadjuvant chemoradiation (nCRT) is the treatment of choice for patients with locally advanced squamous cell carcinoma of the esophagus (SCC). Today radiation oncologists can choose between two different therapy regimes including chemoradiation with cisplatin and 5-fluoruracil (CDDP/5FU) and chemoradiation analogue to the CROSS-regime with carboplatin and paclitaxel (Carb/TAX). However, there is a lack of studies comparing these regimes, especially for the subgroup of patients with SCC...
November 21, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29157265/the-impact-of-dual-energy-ct-imaging-on-dose-calculations-for-pre-clinical-studies
#2
Ana Vaniqui, Lotte E J R Schyns, Isabel P Almeida, Brent van der Heyden, Stefan J van Hoof, Frank Verhaegen
BACKGROUND: To investigate the feasibility of using dual-energy CT (DECT) for tissue segmentation and kilovolt (kV) dose calculations in pre-clinical studies and assess potential dose calculation accuracy gain. METHODS: Two phantoms and an ex-vivo mouse were scanned in a small animal irradiator with two distinct energies. Tissue segmentation was performed with the single-energy CT (SECT) and DECT methods. A number of different material maps was used. Dose calculations were performed to verify the impact of segmentations on the dose accuracy...
November 21, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29141663/quality-assurance-of-the-scope-1-trial-in-oesophageal-radiotherapy
#3
Lucy Wills, Rhydian Maggs, Geraint Lewis, Gareth Jones, Lisette Nixon, John Staffurth, Tom Crosby
BACKGROUND: SCOPE 1 was the first UK based multi-centre trial involving radiotherapy of the oesophagus. A comprehensive radiotherapy trials quality assurance programme was launched with two main aims: 1. To assist centres, where needed, to adapt their radiotherapy techniques in order to achieve protocol compliance and thereby enable their participation in the trial. 2. To support the trial's clinical outcomes by ensuring the consistent planning and delivery of radiotherapy across all participating centres...
November 15, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29137654/conventional-fractionation-should-not-be-the-standard-of-care-for-t2-glottic-cancer
#4
Lynne M Dixon, Catriona M Douglas, Shazril Imran Shaukat, Kate Garcez, Lip Wai Lee, Andrew J Sykes, David Thomson, Nicholas J Slevin
BACKGROUND: The aim of this study was to report outcomes and late toxicity following hypofractionated accelerated radiotherapy for T2 glottic cancers. We highlight the importance of hypofractionated treatments with shorter overall treatment times, in improving outcomes for T2 glottic cancers. We also compare the biologically effective dose of hypofractionated regimes, with conventional fractionation. METHODS: One hundred twelve patients with T2 glottic cancer were treated between January 1999 and December 2005...
November 14, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29132382/early-motor-function-after-local-treatment-of-brain-metastases-in-the-motor-cortex-region-with-stereotactic-radiotherapy-radiosurgery-or-microsurgical-resection-a-retrospective-study-of-two-consecutive-cohorts
#5
Bogdan Pintea, Brigitta Baumert, Thomas Mehari Kinfe, Konstantinos Gousias, Yaroslav Parpaley, Jan Patrick Boström
BACKGROUND: We compared the functional outcome and influential factors of two standard treatment modalities for central cerebral metastases: electrophysiological-controlled microsurgical resection (MSR) and stereotactic radiotherapy/stereotactic radiosurgery (SRT/SRS). METHODS: We performed a database search for central metastasis treatments during the period from January 2008 to September 2012 in two clinical registers: 1) register for intraoperative neuromonitoring (Department of Neurosurgery), and 2) prospective database for SRT/SRS (Department of Radiotherapy)...
November 13, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29126446/detection-level-and-pattern-of-positive-lesions-using-psma-pet-ct-for-staging-prior-to-radiation-therapy
#6
Nina-Sophie Schmidt-Hegemann, Wolfgang Peter Fendler, Alexander Buchner, Christian Stief, Paul Rogowski, Maximilian Niyazi, Chukwuka Eze, Minglun Li, Peter Bartenstein, Claus Belka, Ute Ganswindt
BACKGROUND: To determine the potential role of (68)Ga-PSMA positron emission tomography/computed tomography (PET/CT) in radiotherapy (RT) planning for prostate cancer (PCa). METHODS: One hundred twenty-nine patients (pts) with (68)Ga-PSMA PET/CT were retrospectively analysed. Potentially influencing factors (androgen deprivation therapy, amount of (68)Ga-PSMA-HBED-CC, PSA doubling time ≤/> 10 months, PSA before PET/CT, T-/N-category and Gleason score) were evaluated by logistic regression analysis...
November 10, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29121984/carbon-ion-radiotherapy-impact-of-tumor-differentiation-on-local-control-in-experimental-prostate-carcinomas
#7
Christin Glowa, Peter Peschke, Stephan Brons, Oliver C Neels, Klaus Kopka, Jürgen Debus, Christian P Karger
BACKGROUND: To summarize the research activities of the "clinical research group heavy ion therapy", funded by the German Research Foundation (DFG, KFO 214), on the impact of intrinsic tumor characteristics (grading, hypoxia) on local tumor control after carbon ((12)C-) ion- and photon irradiations. METHODS: Three sublines of syngeneic rat prostate tumors (R3327) with various differentiation levels (highly (-H), moderately (-HI) or anaplastic (-AT1), (diameter 10 mm) were irradiated with 1, 2 and 6 fractions of either (12)C-ions or 6 MV photons using increasing dose levels...
November 9, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29121945/potential-dosimetric-benefits-of-adaptive-tumor-tracking-over-the-internal-target-volume-concept-for-stereotactic-body-radiation-therapy-of-pancreatic-cancer
#8
Konstantina Karava, Stefanie Ehrbar, Oliver Riesterer, Johannes Roesch, Stefan Glatz, Stephan Klöck, Matthias Guckenberger, Stephanie Tanadini-Lang
BACKGROUND: Radiotherapy for pancreatic cancer has two major challenges: (I) the tumor is adjacent to several critical organs and, (II) the mobility of both, the tumor and its surrounding organs at risk (OARs). A treatment planning study simulating stereotactic body radiation therapy (SBRT) for pancreatic tumors with both the internal target volume (ITV) concept and the tumor tracking approach was performed. The two respiratory motion-management techniques were compared in terms of doses to the target volume and organs at risk...
November 9, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29117865/correction-to-improved-plan-quality-with-automated-radiotherapy-planning-for-whole-brain-with-hippocampus-sparing-a-comparison-to-the-rtog-0933-trial
#9
J Krayenbuehl, M Di Martino, M Guckenberger, N Andratschke
In the original publication [1] figure legends 2 and 4 have been swapped. The original article was updated to rectify this error.
November 8, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29116014/quantitative-assessment-of-radiation-dose-and-fractionation-effects-on-normal-tissue-by-utilizing-a-novel-lung-fibrosis-index-model
#10
Cheng Zhou, Bleddyn Jones, Mahmoud Moustafa, Christian Schwager, Julia Bauer, Bing Yang, Liji Cao, Min Jia, Andrea Mairani, Ming Chen, Longhua Chen, Juergen Debus, Amir Abdollahi
BACKGROUND: Normal lung tissue tolerance constitutes a limiting factor in delivering the required dose of radiotherapy to cure thoracic and chest wall malignancies. Radiation-induced lung fibrosis (RILF) is considered a critical determinant for late normal tissue complications. While RILF mouse models are frequently approached e.g., as a single high dose thoracic irradiation to investigate lung fibrosis and candidate modulators, a systematic radiobiological characterization of RILF mouse model is urgently needed to compare relative biological effectiveness (RBE) of particle irradiation with protons, helium-, carbon and oxygen ions now available at HIT...
November 7, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29110732/normal-lung-sparing-tomotherapy-technique-in-stage-iii-lung-cancer
#11
Chae-Seon Hong, Sang Gyu Ju, Yong Chan Ahn, Gyu Sang Yoo, Jae Myoung Noh, Dongryul Oh, Kwangzoo Chung, Hongryull Pyo, Kwanghyun Jo
PURPOSE: Radiation pneumonitis (RP) has been a challenging obstacle in treating stage III lung cancer patients. Beam angle optimization (BAO) technique for Tomotherapy was developed to reduce the normal lung dose for stage III non-small cell lung cancer (NSCLC). Comparative analyses on plan quality by 3 different Intensity-modulated radiation therapy (IMRT) methods with BAO were done. MATERIALS AND METHODS: Ten consecutive stage IIIB NSCLC patients receiving linac-based static IMRT (L-IMRT) with total 66 Gy in 33 fractions to the PTV were selected...
November 6, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29110720/first-intraindividual-comparison-of-contrast-enhanced-mri-fet-and-dotatoc-pet-in-patients-with-intracranial-meningiomas
#12
Jan Oliver Dittmar, Clemens Kratochwil, Anne Dittmar, Thomas Welzel, Daniel Habermehl, Stefan Rieken, Frederik L Giesel, Uwe Haberkorn, Jürgen Debus, Stephanie E Combs
BACKGROUND: For irradiation treatment planning of meningiomas the use of PET-scans is well established. The most frequently used tracers are either based on amino acids or the somatostatin receptor ligand DOTATOC. Since up to now no inter-institutionally accepted standard PET-tracer has been defined, the aim of this study was to evaluate the influence of these different types of PET-tracers on the GTV-definition. METHODS: Twenty-one patients suffering from intracranial meningiomas underwent CT, MRI, FET- and DOTATOC-PET...
November 6, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29110693/management-of-organ-motion-in-scanned-ion-beam-therapy
#13
REVIEW
Christoph Bert, Klaus Herfarth
Scanned ion beam therapy has special demands for treatment of intra-fractionally moving tumors such as lesions in lung or liver. Interplay effects between beam and organ motion can in those settings lead to under-dosage of the target volume. Dedicated treatment techniques such as gating or abdominal compression are required. In addition 4D treatment planning should be used to determine strategies for patient specific treatment planning such as an increased beam focus or the use of internal target volumes incorporating range changes...
November 6, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29110689/multicriteria-plan-optimization-in-the-hands-of-physicians-a-pilot-study-in-prostate-cancer-and-brain-tumors
#14
Birgit S Müller, Helen A Shih, Jason A Efstathiou, Thomas Bortfeld, David Craft
BACKGROUND: The purpose of this study was to demonstrate the feasibility of physician driven planning in intensity modulated radiotherapy (IMRT) with a multicriteria optimization (MCO) treatment planning system and template based plan optimization. Exploiting the full planning potential of MCO navigation, this alternative planning approach intends to improve planning efficiency and individual plan quality. METHODS: Planning was retrospectively performed on 12 brain tumor and 10 post-prostatectomy prostate patients previously treated with MCO-IMRT...
November 6, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29110673/clinical-outcomes-of-graves-ophthalmopathy-treated-with-intensity-modulated-radiation-therapy
#15
Yong-Jiang Li, Yong Luo, Wei-Min He, Ping Li, Feng Wang
BACKGROUND: Radiation for Graves' ophthalmopathy (GO) has traditionally utilized lateral opposing fields (LOF) or three-dimensional conformal radiotherapy (3DCRT) technique. The current study was conducted to report clinical outcomes and therapeutic effects of intensity modulated radiation therapy (IMRT) in treating GO patients. METHODS: One hundred sixteen patients with GO were treated with IMRT as initial local therapy between July 2010 and August 2013, with a median follow-up of 62 months (range 45-81 months)...
November 6, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29100548/an-investigation-into-the-range-dependence-of-target-delineation-strategies-for-stereotactic-lung-radiotherapy
#16
Dennis J Mohatt, John M Keim, Mathew C Greene, Ami Patel-Yadav, Jorge A Gomez, Harish K Malhotra
BACKGROUND: The "gold standard" approach for defining an internal target volume (ITV) is using 10 gross tumor volume (GTV) phases delineated over the course of one respiratory cycle. However, different sites have adopted several alternative techniques which compress all temporal information into one CT image set to optimize work flow efficiency. The purpose of this study is to evaluate alternative target segmentation strategies with respect to the 10 phase gold standard. METHODS: A Quasar respiratory motion phantom was employed to simulate lung tumor movement...
November 3, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29096667/temporal-and-spatial-dose-distribution-of-radiation-pneumonitis-after-concurrent-radiochemotherapy-in-stage-iii-non-small-cell-cancer-patients
#17
Mohammed Alharbi, Stefan Janssen, Heiko Golpon, Michael Bremer, Christoph Henkenberens
BACKGROUND AND PURPOSE: Radiation pneumonitis (RP) is the most common subacute side effect after concurrent chemoradiotherapy (CRT) for locally advanced non-small cell lung cancer. Several clinical and dose-volume (DV) parameters are associated with a distinct risk of symptomatic RP. The aim of this study was to assess the spatial dose distribution of the RP volume from first occurence to maximum volume expansion of RP. MATERIAL AND METHODS: Between 2007 and 2015, 732 patients with lung cancer were treated in an institution...
November 2, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29073917/benefit-of-salvage-total-pharyngolaryngoesophagectomy-for-recurrent-locally-advanced-head-and-neck-cancer-after-radiotherapy
#18
Jie Liu, Ye Zhang, Zhengjiang Li, Shaoyan Liu, Huizheng Li, Zhengang Xu
BACKGROUND: The treatment modalities for recurrent locally advanced head and neck cancer failure after radiotherapy are limited with poor prognosis. Salvage supra-radical operation seems to be an option. It has not been established which patients will benefit from salvage total pharyngolaryngoesophagectomy. METHODS: We retrospectively reviewed 66 patients with previously irradiated recurrent T4 head and neck cancer who underwent salvage total pharyngolaryngoesophagectomy at our institution between January 2001 and June 2014...
October 26, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29052532/stereotactic-body-radiation-therapy-sbrt-for-definitive-treatment-and-as-a-bridge-to-liver-transplantation-in-early-stage-inoperable-hepatocellular-carcinoma
#19
Assaf Moore, Michal Cohen-Naftaly, Anna Tobar, Yulia Kundel, Ofer Benjaminov, Marius Braun, Assaf Issachar, Eytan Mor, Michal Sarfaty, Dimitri Bragilovski, Ran Ben Hur, Noa Gordon, Salomon M Stemmer, Aaron M Allen
BACKGROUND AND PURPOSE: Stereotactic body radiotherapy (SBRT) is an emerging modality for definitive treatment of Hepatocellular carcinoma (HCC). MATERIALS AND METHODS: This retrospective study included all early stage HCC patients who were not candidates for primary resection and/or local therapy, treated with SBRT between 11/2011 and 1/2016. RESULTS: Twenty-three patients were included. The median age was 62 years; 70% males; 30% females; 70% viral hepatitis carriers; 100% cirrhotic; 13 Child Pugh [CP]-A and 10 [CP]-B...
October 19, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29052514/five-fraction-sbrt-for-ultra-central-nsclc-in-field-recurrences-following-high-dose-conventional-radiation
#20
Michael C Repka, Nima Aghdam, Shaan K Kataria, Lloyd Campbell, Simeng Suy, Sean P Collins, Eric Anderson, Jonathan W Lischalk, Brian T Collins
PURPOSE/OBJECTIVE: Local treatment options for patients with in-field non-small cell lung cancer (NSCLC) recurrence following conventionally fractionated external beam radiation therapy (CF-EBRT) are limited. Stereotactic body radiation therapy (SBRT) is a promising modality to achieve reasonable local control, although toxicity remains a concern. MATERIALS/METHODS: Patients previously treated with high-dose CF-EBRT (≥59.4 Gy, ≤3 Gy/fraction) for non-metastatic NSCLC who underwent salvage SBRT for localized ultra-central in-field recurrence were included in this analysis...
October 19, 2017: Radiation Oncology
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