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Contouring radiotherapy

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https://www.readbyqxmd.com/read/28919003/inter-observer-agreement-in-gtv-delineation-of-bone-metastases-on-ct-and-impact-of-mr-imaging-a-multicenter-study
#1
A S Gerlich, J M van der Velden, A N T J Kotte, C L Tseng, G Fanetti, W S C Eppinga, N Kasperts, M P W Intven, F A Pameijer, M E P Philippens, H M Verkooijen, E Seravalli
BACKGROUND AND PURPOSE: The use of Stereotactic Body Radiotherapy (SBRT) for bone metastases is increasing rapidly. Therefore, knowledge of the inter-observer differences in tumor volume delineation is essential to guarantee precise dose delivery. The aim of this study is to compare inter-observer agreement in bone metastases delineated on different imaging modalities. MATERIAL AND METHODS: Twenty consecutive patients with bone metastases treated with SBRT were selected...
September 14, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28890821/feasibility-and-reproducibility-of-substituting-oral-contrast-with-water-for-duodenal-volume-delineation-in-patients-undergoing-pancreatic-stereotactic-body-radiotherapy
#2
Guangyin Wu, Vivek Verma, Matthias F Haefner, Sicong Li, Chi Lin
BACKGROUND: This is the first known report evaluating the feasibility of substituting oral contrast with water in efforts to delineate the duodenum for pancreatic stereotactic body radiotherapy (SBRT). METHODS: From January 2015 to August 2016, 13 patients were simulated after ingestion of 8 ounces of water approximately 15-20 min prior to their simulation scan. We examined the feasibility of contouring the duodenum thereafter, and measured the duodenal volume as well as its variation...
August 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28888744/-stereotactic-body-radiotherapy-for-liver-tumors-state-of-the-art
#3
O Riou, D Azria, F Mornex
Thanks to the improvement in radiotherapy physics, biology, computing and imaging, patients presenting with liver tumors can be efficiently treated by radiation. Radiotherapy has been included in liver tumors treatment guidelines at all disease stages. Liver stereotactic radiotherapy has to be preferred to standard fractionated radiotherapy whenever possible, as potentially more efficient because of higher biological equivalent dose. Liver stereotactic radiotherapy planning and delivery require extensive experience and optimal treatment quality at every step, thus limiting its availability to specialized centres...
September 6, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28884310/radiation-induced-acute-dysphagia-prospective-observational-study-on-42%C3%A2-head-and-neck-cancer-patients
#4
D Alterio, M A Gerardi, L Cella, R Spoto, V Zurlo, A Sabbatini, C Fodor, V D'Avino, M Conson, F Valoriani, D Ciardo, R Pacelli, A Ferrari, P Maisonneuve, L Preda, R Bruschini, M Cossu Rocca, E Rondi, S Colangione, G Palma, S Dicuonzo, R Orecchia, G Sanguineti, B A Jereczek-Fossa
PURPOSE: Acute toxicity in head and neck (H&N) cancer patients treated with definitive radiotherapy (RT) has a crucial role in compliance to treatments. The aim of this study was to correlate doses to swallowing-associated structures and acute dysphagia. METHODS: We prospectively analyzed 42 H&N cancer patients treated with RT. Dysphagia (grade ≥ 3) and indication for percutaneous endoscopic gastrostomy (PEG) insertion were classified as acute toxicity. Ten swallowing-related structures were considered for the dosimetric analysis...
September 7, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28870056/-application-of-autologous-fat-grafting-in-breast-reconstruction
#5
L Cai, X F Han, B Q Wang, F C Li
Objective: To observe the outcome of breast reconstruction with autologous fat grafting in the patients following treatment for breast cancer. Methods: The clinical data of 22 patients after breast cancer modified radical mastectomy with fat grafting for breast reconstruction from January 2012 to March 2015 at Department of Body Contouring and Liposuction Center of Plastic Surgery, Hospital of Peking Union Medical College were analyzed retrospectively. The age of 22 patients (all female) was 28 to 54 years...
September 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/28866897/superior-target-delineation-for-stereotactic-body-radiotherapy-of-bone-metastases-from-renal-cell-carcinoma-on-mri-compared-to-ct
#6
Fieke M Prins, Joanne M van der Velden, Anne S Gerlich, Alexis N T J Kotte, Wietse S C Eppinga, Nicolien Kasperts, Jorrit J Verlaan, Frank A Pameijer, Linda G W Kerkmeijer
BACKGROUND: In metastatic renal cell carcinoma (mRCC) there has been a treatment shift towards targeted therapy, which has resulted in improved overall survival. Therefore, there is a need for better local control of the tumor and its metastases. Image-guided stereotactic body radiotherapy (SBRT) in bone metastases provides improved symptom palliation and local control. With the use of SBRT there is a need for accurate target delineation. The hypothesis is that MRI allows for better visualization of the extend of bone metastases in mRCC and will optimize the accuracy of tumor delineation for stereotactic radiotherapy purposes, compared with CT only...
July 11, 2017: Annals of Palliative Medicine
https://www.readbyqxmd.com/read/28859933/evaluation-of-high-dose-volumetric-ct-to-reduce-inter-observer-delineation-variability-and-ptv-margins-for-prostate-cancer-radiotherapy
#7
Hamideh Alasti, Young-Bin Cho, Charles Catton, Alejandro Berlin, Peter Chung, Andrew Bayley, Aaron Vandermeer, Vickie Kong, David Jaffray
PURPOSE: The aim was to determine whether the enhanced soft tissue contrast provided by high-dose volumetric CT (HDVCT) can reduce inter-observer variability in delineating prostate compared to helical conventional CT (CCT) scans and 3T MRI scans for patients undergoing radical prostate cancer radiotherapy. Secondly, to quantify the potential PTV reduction with decreased inter-observer variability. MATERIALS AND METHODS: A 320 slice volumetric CT scanner was used...
August 28, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28844506/-stereotactic-body-radiation-therapy-for-hepatic-malignancies-organs-at-risk-uncertainties-margins-doses
#8
T Lacornerie, E Rio, M-A Mahé
Stereotactic body radiation therapy for primary and metastatic hepatic malignancies can be performed in association and/or as an alternative to surgery and radiofrequency. The consequences of the great number of techniques available are heterogeneity in contouring, dose prescription and in determination of dose constraints for organs at risk. The objective of this paper is to improve the quality and safety and to help the diffusion of this technique for a majority of patients. In 2016, the French Society of Radiation Oncology (SFRO) published guidelines for external radiotherapy and brachytherapy ("Recorad")...
August 24, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28843360/prognostic-value-of-primary-tumor-volume-changes-on-kv-cbct-during-definitive-chemoradiotherapy-for-stage-iii-non-small-cell-lung-cancer
#9
P Wald, X Mo, C Barney, D Gunderson, A K Haglund, J Bazan, J Grecula, A Chakravarti, T Williams, D P Carbone, M Xu-Welliver
INTRODUCTION: Kilo-voltage cone beam computed tomography (kV-CBCT) allows for tumor localization and response assessment during definitive chemoradiotherapy for locally advanced non-small cell lung cancer (LA-NSCLC). We hypothesize that significant tumor volume loss occurs early during radiotherapy, and that the extent of volume loss correlates with clinical outcomes. METHODS: 52 patients with LA-NSCLC treated with definitive chemoradiotherapy were reviewed. kV-CBCT images were used to contour primary gross tumor volumes (GTV) at four time points during treatment...
August 23, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28833829/long-term-outcome-of-18-f-fluorodeoxyglucose-positron-emission-tomography-guided-dose-painting-for-head-and-neck-cancer-matched-case-control-study
#10
Dieter Berwouts, Indira Madani, Frédéric Duprez, AnaMaria Luiza Olteanu, Tom Vercauteren, Tom Boterberg, Philippe Deron, Katrien Bonte, Wouter Huvenne, Wilfried De Neve, Ingeborg Goethals
BACKGROUND: The purpose of this study was to report the long-term outcome of (18) F-fluorodeoxyglucose-positron emission tomography ((18) F-FDG-PET)-guided dose painting for head and neck cancer in comparison to conventional intensity-modulated radiotherapy (IMRT) in a matched case-control study. METHODS: Seventy-two patients with nonmetastatic head and neck cancer treated with dose painting were compared with 72 control patients matched on tumor site and T classification...
August 21, 2017: Head & Neck
https://www.readbyqxmd.com/read/28830203/multimodal-image-registration-for-the-identification-of-dominant-intraprostatic-lesion-in-high-precision-radiotherapy-treatments
#11
Delia Ciardo, Barbara Alicja Jereczek-Fossa, Giuseppe Petralia, Giorgia Timon, Dario Zerini, Raffaella Cambria, Elena Rondi, Federica Cattani, Alessia Bazani, Rosalinda Ricotti, Maria Garioni, Davide Maestri, Giulia Marvaso, Paola Romanelli, Marco Riboldi, Guido Baroni, Roberto Orecchia
PURPOSE: The integration of computed tomography (CT) and multiparametric magnetic resonance imaging (mpMRI) is a challenging task in high-precision radiotherapy for prostate cancer. A simple methodology for multimodal deformable image registration (DIR) of prostate cancer patients is presented. METHODS: CT and mpMRI of ten patients were considered. Organs at risk and prostate were contoured on both scans. The dominant intraprostatic lesion was additionally delineated on magnetic resonance imaging...
August 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28811150/best-practice-recommendations-for-the-retention-of-radiotherapy-records
#12
E Lockhart, K Bak, L J Schreiner, D C Hodgson, E Gutierrez, P Warde, M B Sharpe
This paper offers best practice recommendations for the maintenance and retention of radiotherapy health records and technical information for cancer programmes. The recommendations are based on a review of the published and grey literature, feedback from key informants from seven countries and expert consensus. Ideally, complete health records should be retained for 5 years beyond the patient's lifetime, regardless of where they are created and maintained. Technical information constituting the radiotherapy plan should also be retained beyond the patient's lifetime for 5 years, including the primary images, contours of delineated targets and critical organs, dose distributions and other radiotherapy plan objects...
August 12, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28797999/long-term-results-of-post-operative-pelvic-image-guided-intensity-modulated-radiotherapy-in-gynecological-malignancies
#13
Rashi Agrawal, Sowmiya Prithiviraj, Dinesh Singh, Vaishali Zamre, Sandeep Agrawal, Arun Kumar Goel, Kanika Gupta, Bala Subramanian
OBJECTIVE: To assess late clinical outcomes with image guided intensity modulated radiotherapy (IG- IMRT) in gynecological malignancies. PATIENTS AND METHODS: We have been practicing IG IMRT for gynecological malignancies since January 2009. Here we are presenting our experience with this modern technique at median follow up of 38 months. During whole treatment bladder filling protocol was followed. Both target volumes and critical structures were contoured according to RTOG guidelines...
May 2017: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28797587/subcutaneous-adipose-tissue-characteristics-and-the-risk-of-biochemical-recurrence-in-men-with-high-risk-prostate-cancer
#14
Andrew M McDonald, John B Fiveash, Robert S Kirkland, Rex A Cardan, Rojymon Jacob, Robert Y Kim, Michael C Dobelbower, Eddy S Yang
PURPOSE/OBJECTIVE(S): To assess subcutaneous adipose tissue characteristics by computed tomography (CT) as potential imaging biomarkers predictive of biochemical recurrence in men with high-risk prostate cancer receiving radiotherapy (RT). MATERIALS AND METHODS: This retrospective study included men with high-risk prostate cancer (PSA>20ng/ml, Gleason score ≥8, or clinical extraprostatic extension) treated between 2001 and 2012. All patients received definitive, dose-escalated external beam RT along with a course of neoadjuvant, concurrent, and adjuvant androgen deprivation therapy (ADT)...
August 7, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28781156/evaluation-of-deformed-image-based-dose-calculations-for-adaptive-radiotherapy-of-nasopharyngeal-carcinoma
#15
Miranda Poon, Catherine Holborn, Ka Fai Cheng, Winky Wing Ki Fung, George Chiu
The ultimate goal of adaptive radiotherapy (ART) is to deliver truly customized radiation treatments. Currently, the quality of cone-beam computed tomography (CBCT) images is still inferior to that of conventional CT images in contour delineations and dose calculations for replanning purposes. This retrospective study aims to evaluate the dosimetric accuracy of using deformed conventional CT images for dose calculations, in the hope of inferring the feasibility of ART using planning CT (PCT) images that deformed to up-to-date CBCT images for patients with nasopharyngeal carcinoma (NPC)...
August 3, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28774489/-normal-tissue-tolerance-to-external-beam-radiation-therapy-bone-marrow-and-cortical-bone-structures
#16
A Schernberg, C Hennequin
In patients undergoing external radiation therapy, bone marrow and cortical bone structures are all often neglected as organs at risk. Still, from increased febrile neutropenia risk in patients undergoing chemoradiation for a pelvic tumour to increased risk of vertebral fracture when undergoing hypofractioned stereotactic radiotherapy of a spinal metastasis, adverse effects are frequent and sometimes serious. This literature review first defines the rules for contouring these structures, then the dose constraints currently recommended...
July 31, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28762462/radiation-induced-neurocognitive-dysfunction-in-head-and-neck-cancer-patients
#17
REVIEW
Francesca De Felice, Pierre Blanchard
It might seem odd that a special issue about Gianni Bonadonna would publish a review on radiation-induced neurocognitive dysfunction. Dr. Gianni Bonadonna is considered a pioneer in medical oncology history, mainly due to new and revolutionary treatment approaches proposed in breast cancer and Hodgkin lymphoma. He had an active role in the field of medical oncology, especially through lectures and textbooks. He shared his considerable insight of understanding cancer behavior and evaluating research advances over the years to prevent tumor recurrence and preserve patients from unnecessary toxicity...
July 31, 2017: Tumori
https://www.readbyqxmd.com/read/28740459/dosimetric-predictors-of-treatment-related-lymphopenia-induced-by-palliative-radiotherapy-predictive-ability-of-dose-volume-parameters-based-on-body-surface-contour
#18
Tetsuo Saito, Ryo Toya, Tomohiko Matsuyama, Akiko Semba, Natsuo Oya
BACKGROUND: Radiation-related lymphopenia has been associated with poor patient outcome. Our aim was to identify predictors of lymphopenia after palliative radiotherapy, with a focus on dose-volume parameters. PATIENTS AND METHODS: To retrospectively assess patients with various cancers who had undergone palliative radiotherapy, we delineated three organs at risk: the volume enclosed by the body surface contour (body A), the volume left after excluding air, pleural effusion, ascites, bile, urine, and intestinal content (body B), and the volume of the bone marrow (BM)...
June 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/28740451/mri-reduces-variation-of-contouring-for-boost-clinical-target-volume-in-breast-cancer-patients-without-surgical-clips-in-the-tumour-bed
#19
Noora Al-Hammadi, Palmira Caparrotti, Saju Divakar, Mohamed Riyas, Suparna Halsnad Chandramouli, Rabih Hammoud, Jillian Hayes, Maeve Mc Garry, Satheesh Prasad Paloor, Primoz Petric
BACKGROUND: Omitting the placement of clips inside tumour bed during breast cancer surgery poses a challenge for delineation of lumpectomy cavity clinical target volume (CTVLC). We aimed to quantify inter-observer variation and accuracy for CT- and MRI-based segmentation of CTVLC in patients without clips. PATIENTS AND METHODS: CT- and MRI-simulator images of 12 breast cancer patients, treated by breast conserving surgery and radiotherapy, were included in this study...
June 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/28727787/feasibility-of-a-3d-printed-anthropomorphic-patient-specific-head-phantom-for-patient-specific-quality-assurance-of-intensity-modulated-radiotherapy
#20
Ji Woon Yea, Jae Won Park, Sung Kyu Kim, Dong Youn Kim, Jae Gu Kim, Chan Young Seo, Won Hyo Jeong, Man Youl Jeong, Se An Oh
This study evaluated the feasibility of utilizing a 3D-printed anthropomorphic patient-specific head phantom for patient-specific quality assurance (QA) in intensity-modulated radiotherapy (IMRT). Contoured left and right head phantoms were converted from DICOM to STL format. Fused deposition modeling (FDM) was used to construct an anthropomorphic patient-specific head phantom with a 3D printer. An established QA technique and the patient-specific head phantom were used to compare the calculated and measured doses...
2017: PloS One
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