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Brachytherapy

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https://www.readbyqxmd.com/read/28642046/prostate-specific-antigen-percentage-an-early-predictive-tool-after-iodine-125-interstitial-brachytherapy-for-prostate-cancer
#1
Mauro Paoluzzi, Andrea Losa, Valentina Cerboneschi, Caterina Colosimo, Nicola Fontana, Paola Mangili, Marcello Mignogna, Luciano Nava, Valentina Ravaglia
BACKGROUND: After interstitial prostate iodine-125 brachytherapy (BT), prostate-specific antigen (PSA) evolution in time could predict overall biochemical relapse, but, considering the single patient, it is influenced by the presentation PSA amount and by the prostatic volume. It is also challenging to differentiate a PSA bounce from a biochemical relapse. PURPOSE: To determine the usefulness of PSA percentage (PP) defined as the rate between PSA presented by a patient at time "t" and the PSA that the same patient had presented at the time of diagnosis (t0) assumed as 100% in predicting biochemical relapse and in differentiating them from PSA Bounces...
June 19, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28624329/the-bebig-valencia-type-skin-applicators-dosimetric-study-and-implementation-of-a-dosimetric-hybrid-technique
#2
Georgios Anagnostopoulos, Michael Andrássy, Dimos Baltas
PURPOSE: To determine the relative dose rate distribution in water for the Bebig 20 mm and 30 mm skin applicators and report results in a form suitable for potential clinical use. Results for both skin applicators are also provided in the form of a hybrid Task Group 43 (TG-43) dosimetry technique. Furthermore, the radiation leakage around both skin applicators from the radiation protection point of view and the impact of the geometrical source position uncertainties are studied and reported...
June 14, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28623085/variability-of-treatment-planning-of-seed-implantation-a-japanese-multicenter-simulation-study
#3
Hiromichi Ishiyama, Masahiro Nakano, Kazuhito Toya, Ryuichi Kota, Koyo Kikuchi, Takahiro Yamaguchi, Naoaki Kono, Shogo Kawakami, Yuki Tsutsumi, Tomoki Tanaka, Takahisa Eriguchi, Saiji Ohga, Toshihiro Yamaguchi, Yoshiaki Takakawa, Masashi Morita, Norihisa Katayama, Toshio Ohashi, Manabu Aoki, Atsunori Yorozu, Siro Saito
PURPOSE: This multicenter study was conducted to evaluate the current variability of treatment planning of seed implantation in Japanese centers and the feasibility of two virtual trials. METHODS AND MATERIALS: Two types of contour data were sent to 12 radiation oncologists with a request letter that asked them to make treatment plans on the data in the same manner as in their own practice. Five of the 12 radiation oncologists were asked to participate in the two virtual trials in which the D90 (dose to the hottest 90% of prostate volume) was 1) required to be set at just 180 Gy and 2) increased as much as possible without violating other limitations...
June 13, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28619385/rectum-and-bladder-spacing-in-cervical-cancer-brachytherapy-using-a-novel-injectable-hydrogel-compound
#4
Antonio L Damato, Megan Kassick, Akila N Viswanathan
PURPOSE: The aim of this study was to evaluate injection of a novel hydrogel (TraceIT; Augmenix, Waltham, MA) between the cervix, rectum, and bladder in female cadavers compared with, and in addition to, the current standard of gauze packing, for organ-at-risk sparing in cervical cancer brachytherapy planning. METHODS AND MATERIALS: This brachytherapy cadaver study used T2-weighted MRI and CT imaging to compare three scenarios: (1) gauze packing alone, (2) hydrogel injection placed in the cervical fornices and rectovaginal septum, and (3) gauze packing in conjunction with hydrogel injection...
June 12, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28602708/reduced-toxicity-with-equivalent-outcomes-using-three-dimensional-volumetric-3dv-image-based-versus-nonvolumetric-point-based-nv-brachytherapy-in-a-cervical-cancer-population
#5
Kimberly M Thomas, Genevieve Maquilan, Strahinja Stojadinovic, Paul Medin, Michael R Folkert, Kevin Albuquerque
PURPOSE: Brachytherapy (BT) techniques have historically used a two-dimensional nonvolumetric (NV) system involving dose prescribed to a point fixed in space. We compared dosimetric, toxicity, and oncologic outcomes for volumetric planning (3DV) versus CT point-based planning. METHODS AND MATERIALS: Patients treated with external beam radiation therapy and high dose rate (HDR) intracavitary BT were included (n = 71). Patients planned with NV BT treated from 2009 to 2011 (n = 37) were compared to patients planned with 3DV BT treated from 2012 to 2014 (n = 34)...
June 8, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28600140/income-generated-by-women-treated-with-magnetic-resonance-imaging-based-brachytherapy-a-simulation-study-evaluating-the-macroeconomic-benefits-of-implementing-a-high-end-technology-in-a-public-sector-healthcare-setting
#6
Santam Chakraborty, Umesh Mahantshetty, Supriya Chopra, Shirley Lewis, Vinod Hande, Shivakumar Gudi, Rahul Krishnatry, Reena Engineer, Shyam Kishore Shrivastava
PURPOSE: To estimate the difference in income generated if all women presenting in our institute over a 5-year period were treated with MRI-based image-guided brachytherapy (MR-IGBT) instead of conventional radiograph-based brachytherapy (CR-BT). METHODS AND MATERIALS: Outcome data from 463 patients (94 treated with MR-IGBT) treated in our institute was used to simulate cumulative women-days of work and cumulative income over 5 years for 5526 patients expected to be treated in this period...
June 6, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28600139/change-of-target-volume-and-its-dosimetric-impact-during-the-course-of-accelerated-partial-breast-irradiation-using-intraoperative-multicatheter-interstitial-brachytherapy-after-open-cavity-surgery
#7
Ritu Raj Upreti, Ashwini Budrukkar, Udita Upreti, Shagun Misra, Tabassum Wadasadawala, Satish Kohle, Deepak D Deshpande
PURPOSE: To investigate the change of clinical target volume (CTV) and its dosimetric impact during the course of accelerated partial breast irradiation (APBI) using intraoperative multicatheter interstitial brachytherapy after open cavity surgery. METHODS AND MATERIALS: Twenty-two patients of APBI with intraoperative placement of catheters underwent computed tomography scans for the treatment planning before the first (CT1) and the last (CT2) treatment fraction...
June 6, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28579419/the-effect-of-catheter-displacement-and-anatomical-variations-on-the-dose-distribution-in-mri-guided-focal-hdr-brachytherapy-for-prostate-cancer
#8
Metha Maenhout, Jochem R N van der Voort van Zyp, Maxence Borot de Battisti, Max Peters, Marco van Vulpen, Maurice van den Bosch, Marinus A Moerland
PURPOSE: The aim of this study was to analyze the effect of catheter displacement and anatomical variations of prostate and organs at risk on dose distribution in MRI-guided 19 Gy single fraction focal high-dose-rate brachytherapy (HDR-BT) of the prostate. METHODS AND MATERIALS: Seventeen patients with localized prostate cancer were enrolled in a prospective trial investigating focal HDR-BT in a 1.5 T MRI-HDR-BT facility. The diagnostic MRI delineations were registered with intraoperative MR scan, and a single fraction of 19 Gy was applied to the visible tumor...
June 1, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28578920/clinical-factors-and-dosimetry-associated-with-the-development-of-prostate-brachytherapy-related-urethral-strictures-a-matched-case-control-study
#9
Sandeep Singhal, Muhammad F Jamaluddin, Emma Lee, Ronald S Sloboda, Matthew Parliament, Nawaid Usmani
PURPOSE: Urethral strictures are a rare complication of prostate brachytherapy (BXT), with prior studies showing radiation dose to the bulbomembranous urethra as being associated with stricture formation. This retrospective case-control study explored clinical and dosimetric parameters associated with the development of BXT-related urethral strictures. METHODS AND MATERIALS: A cohort of 34 patients developed urethral strictures after BXT at our institution for the period of 2008-2014...
May 31, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28578919/opioid-consumption-and-pain-in-gynecological-cancer-patients-treated-with-interstitial-brachytherapy
#10
Lucas C Mendez, Stephen Choi, Laura D'Alimonte, Elizabeth Barnes, Lisa Barbera, Eric Leung
PURPOSE: Interstitial brachytherapy (ISBT) has advantages over the intracavitary techniques in the treatment of gynecological malignancies. The insertion of catheters into tumor enables higher dose conformality and normal tissue sparing. However ISBT can be associated with pain due its invasiveness. The goal of this study is to assess pain and opioid consumption of patients implanted with a perineal ISBT applicator. METHODS AND MATERIALS: Forty-eight patients were treated with ISBT from September 2014 to April 2016...
May 31, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28576644/real-time-electromagnetic-tracking-based-treatment-platform-for-high-dose-rate-prostate-brachytherapy-clinical-workflows-and-end-to-end-validation
#11
Luc Beaulieu, Emmanuel Racine, Dae Yup Han, Eric Vigneault, I-Chow Hsu, J Adam M Cunha
PURPOSE: New technologies were integrated into a novel treatment platform combining electromagnetically (EM) tracked catheters, a 3D ultrasound (3DUS) imaging device, and a new treatment planning system to provide a real-time prostate high-dose-rate (HDR) brachytherapy treatment system. This work defines workflows for offline CT and online 3DUS planning scenarios and preclinical end-to-end validation of the platform. METHODS AND MATERIALS: The platform is composed of an EM-tracked stylet, a EM-tracked 3DUS probe, and an EM-tracked template guide, all used with the NDI Aurora field generator (NDI, Ontario, Canada)...
May 30, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28552495/bending-the-slope-of-the-brachytherapy-curve-mri-assisted-radiosurgery-for-the-treatment-of-prostate-cancer
#12
EDITORIAL
Steven J Frank, Firas Mourtada
No abstract text is available yet for this article.
May 25, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28552494/quantitative-analysis-of-genitourinary-toxicity-after-iodine-125-brachytherapy-for-localized-prostate-cancer-followup-of-the-international-prostate-symptom-score-and-overactive-bladder-symptom-score
#13
Masanori Sakayori, Toshio Ohashi, Tetsuo Momma, Tomoya Kaneda, Shuichi Nishimura, Shinya Sutani, Shoji Yamashita, Naoyuki Shigematsu
PURPOSE: To analyze genitourinary toxicity by followup of the International Prostate Symptom Score (IPSS) and Overactive Bladder Symptom Score (OABSS) after prostate brachytherapy. METHODS AND MATERIALS: Six hundred eighty patients were treated with iodine-125 brachytherapy for localized prostate cancer. IPSS, OABSS, and two categories of IPSS questions (storage symptom score [IPSS-S] and voiding symptom score [IPSS-V]) were evaluated. RESULTS: The median followup was 54 months (range, 24-108)...
May 25, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28551312/locally-advanced-cervical-cancer-is-it-relevant-to-report-image-guided-adaptive-brachytherapy-using-point-a-dose
#14
Renaud Mazeron, Sebastien Gouy, Alexandre Escande, Isabelle Dumas, Eleonor Rivin Del Campo, Enrica Bentivegna, Warren Bocorro, Dimitri Lefkopoulos, Eric Deutsch, Philippe Morice, Christine Haie-Meder, Cyrus Chargari
PURPOSE: To evaluate the usefulness of reporting the point A dose in patients with locally advanced cervical cancer treated with image-guided adaptive brachytherapy (IGABT). METHODS AND MATERIALS: Dosimetric data from patients treated with a combination of chemoradiation and intracavitary IGABT were examined in light of their outcomes. Prescribing followed the Groupe Européen de Curiethérapie-European Society for Radiation Oncology recommendations. All doses were converted in 2-Gy equivalent...
May 24, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28533162/which-patients-with-inoperable-vulvar-cancer-may-benefit-from-brachytherapy-in-addition-to-external-beam-radiation-a-surveillance-epidemiology-and-end-results-analysis
#15
Yuan James Rao, Caressa Hui, Anupama Chundury, Julie K Schwarz, Todd DeWees, Matthew A Powell, David G Mutch, Perry W Grigsby
PURPOSE: It is unknown whether brachytherapy after external beam radiation (EBRT + BT) results in improved outcomes compared with EBRT alone for patients with inoperable vulvar cancer. The purpose of this study was to compare survival outcomes for patients who received these treatment modalities. METHODS AND MATERIALS: Data between 1973 and 2011 from the National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) database were analyzed. Patients with Federation of International Gynecologists and Obstetricians stage I-IVA vulvar cancer treated with definitive EBRT + BT or EBRT alone were included...
May 19, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28528720/in%C3%A2-vivo-dosimetry-in-gynecological-applications-a-feasibility-study
#16
Marion P R Van Gellekom, Richard A M Canters, Frank J W M Dankers, Agnes Loopstra, Elzbieta M van der Steen-Banasik, Marie A D Haverkort
PURPOSE: To investigate the feasibility of in vivo dosimetry using microMOSFET dosimeters in patients treated with brachytherapy using two types of gynecological applicators. METHODS AND MATERIALS: In this study, a microMOSFET was placed in an empty needle of an Utrecht Interstitial Fletcher applicator or MUPIT (Martinez Universal Perineal Interstitial Template) applicator for independent verification of treatment delivery. Measurements were performed in 10 patients, with one to three microMOSFETs per applicator and repeated for one to four fractions, resulting in 50 in vivo measurements...
May 18, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28522118/a-national-survey-of-hdr-source-knowledge-among-practicing-radiation-oncologists-and-residents-establishing-a-willingness-to-pay-threshold-for-cobalt-60-usage
#17
Raymond Mailhot Vega, Wesley Talcott, Omar Ishaq, Patrice Cohen, Christina J Small, Tamara Duckworth, Gustavo Sarria Bardales, Carmen A Perez, Peter B Schiff, William Small, Matthew M Harkenrider
PURPOSE: Ir-192 is the predominant source for high-dose-rate (HDR) brachytherapy in United States markets. Co-60, with longer half-life and fewer source exchanges, has piloted abroad with comparable clinical dosimetry but increased shielding requirements. We sought to identify practitioner knowledge of Co-60 and establish acceptable willingness-to-pay (WTP) thresholds for additional shielding requirements for use in future cost-benefit analysis. METHODS AND MATERIALS: A nationwide survey of U...
May 15, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28511891/external-pelvic-and-vaginal-irradiation-vs-vaginal-irradiation-alone-as-postoperative-therapy-in-women-with-early-stage-uterine-serous-carcinoma-results-of-a-national-cancer-database-analysis
#18
Ankit Modh, Charlotte Burmeister, Adnan R Munkarah, Mohamed A Elshaikh
PURPOSE: Adjuvant treatment in early stage uterine serous carcinoma (USC) usually consists of chemotherapy with vaginal brachytherapy (VB), pelvic external beam radiation therapy (EBRT), or combination. We compared survival outcomes across these various radiation treatment modalities using the National Cancer Database. METHODS AND MATERIALS: The National Cancer Database was queried for adult females with histologically confirmed International Federation of Gynecology and Obstetrics 1988 Stage I-II USC diagnosed from 2003 to 2013 treated definitively with hysterectomy, adjuvant chemotherapy, and radiation therapy...
May 13, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28501429/permanent-prostate-brachytherapy-postimplant-mri-dosimetry-using-positive-contrast-mri-markers
#19
Geoffrey V Martin, Thomas J Pugh, Usama Mahmood, Rajat J Kudchadker, Jihong Wang, Teresa L Bruno, Tharakeswara Bathala, Pierre Blanchard, Steven J Frank
PURPOSE: Permanent prostate brachytherapy dosimetry using computed tomography-magnetic resonance imaging (CT-MRI) fusion combines the anatomic detail of MRI with seed localization on CT but requires multimodality imaging acquisition and fusion. The purpose of this study was to compare the utility of MRI only postimplant dosimetry to standard CT-MRI fusion-based dosimetry. METHODS AND MATERIALS: Twenty-three patients undergoing permanent prostate brachytherapy with use of positive contrast MRI markers were included in this study...
May 10, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28499488/in%C3%A2-vivo-dosimetry-with-alanine-electron-spin-resonance-dosimetry-to-evaluate-the-urethra-dose-during-high-dose-rate-brachytherapy
#20
Daniela Wagner, Markus Hermann, Andrea Hille
PURPOSE: To determine the dose of the urethra during Ir-192 high-dose-rate brachytherapy in 15 patients, a new detector form developed for in vivo measurements was used as described by Anton et al. 2009. METHODS AND MATERIALS: The detector consists of alanine powder with paraffin as binder which was filled in a shrinkable tube for measurements. The alanine strand so produced was inserted in the foley catheter during high-dose-rate brachytherapy of the prostate...
May 9, 2017: Brachytherapy
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