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https://www.readbyqxmd.com/read/29152835/intra-and-inter-fractional-liver-and-lung-tumor-motions-treated-with-sbrt-under-active-breathing-control
#1
Lan Lu, Claudiu Diaconu, Toufik Djemil, Gregory Mm Videtic, May Abdel-Wahab, Naichang Yu, John Greskovich, Kevin L Stephans, Ping Xia
PURPOSE: To assess intra- and inter-fractional motions of liver and lung tumors using active breathing control (ABC). METHODS AND MATERIALS: Nineteen patients with liver cancer and 15 patients with lung cancer treated with stereotactic body radiotherapy (SBRT) were included in this retrospective study. All patients received a series of three CTs at simulation to test breath-hold reproducibility. The centroids of the whole livers and of the lung tumors from the three CTs were compared to assess intra-fraction variability...
November 20, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29128147/using-indocyanine-green-extraction-to-predict-liver-function-after-stereotactic-body-radiation-therapy-for-hepatocellular-carcinoma
#2
Krithika Suresh, Dawn Owen, Latifa Bazzi, William Jackson, Randall K Ten Haken, Kyle Cuneo, Mary Feng, Theodore S Lawrence, Matthew J Schipper
PURPOSE: To test the hypothesis that mid-treatment measures of the retention of indocyanine green after 15 minutes (ICGR15) would improve the prediction of posttreatment liver function in the setting of hepatocellular carcinoma. METHODS AND MATERIALS: Between 2006 and 2015, 144 patients with hepatocellular carcinoma received 175 courses of stereotactic body radiation therapy (SBRT). Patient data, such as age, sex, portal vein thrombosis, cirrhosis, Child-Pugh (CP) score, prior liver-directed therapies, and liver function tests, including albumin-bilirubin (ALBI) and ICG clearance, and dosimetric data, such as tumor volume and radiation dose, were collected...
September 22, 2017: International Journal of Radiation Oncology, Biology, Physics
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
#3
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/29066120/stereotactic-body-radiation-therapy-as-an-alternative-to-transarterial-chemoembolization-for-hepatocellular-carcinoma
#4
Eli Sapir, Yebin Tao, Matthew J Schipper, Latifa Bazzi, Paula M Novelli, Pauline Devlin, Dawn Owen, Kyle C Cuneo, Theodore S Lawrence, Neehar D Parikh, Mary Feng
PURPOSE: To conduct a large single-institution comparison of transarterial chemoembolization (TACE) and stereotactic body radiation therapy (SBRT) outcomes in similar groups of patients with hepatocellular carcinoma (HCC). METHODS AND MATERIALS: From 2006 to 2014, 209 patients with 1 to 2 tumors underwent TACE (n=84) to 114 tumors or image guided SBRT (n=125) to 173 tumors. Propensity score analysis with inverse probability of treatment weighting was used to compare outcomes between treatments while adjusting for imbalances in treatment assignment...
September 14, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29063852/local-control-outcomes-using-stereotactic-body-radiation-therapy-for-liver-metastases-from-colorectal-cancer
#5
Ji Hyeon Joo, Jin-Hong Park, Jin Cheon Kim, Chang Sik Yu, Seok-Byung Lim, In Ja Park, Tae Won Kim, Yong Sang Hong, Kyu-Pyo Kim, Sang Min Yoon, Jongmoo Park, Jong Hoon Kim
PURPOSE: To evaluate the effective dose and patterns of recurrence after stereotactic body radiation therapy (SBRT) for hepatic metastases that arise from colorectal cancer. METHODS AND MATERIALS: A cohort of 70 patients with 103 colorectal liver metastases were treated with SBRT at a single institution. The prescribed doses were 45 to 60 Gy in 3 to 4 fractions, but these were modified according to the tolerance of the adjacent normal tissue. To allow for dose comparisons, a biological equivalent dose was calculated...
November 15, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29059054/correspondence-model-based-4d-vmat-dose-simulation-for-analysis-of-local-metastasis-recurrence-after-extracranial-sbrt
#6
Thilo Sothmann, Tobias Gauer, Matthias Wilms, René Werner
The purpose of this study is to introduce a novel approach to incorporate patient-specific breathing variability information into 4D dose simulation of volumetric arc therapy (VMAT)-based stereotactic body radiotherapy (SBRT) of extracranial metastases. Feasibility of the approach is illustrated by application to treatment planning and motion data of lung and liver metastasis patients. The novel 4D dose simulation approach makes use of a regression-based correspondence model that allows representing patient motion variability by breathing signal-steered interpolation and extrapolation of deformable image registration motion fields...
October 23, 2017: Physics in Medicine and Biology
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
#7
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/29050954/the-trendy-multi-center-randomized-trial-on-hepatocellular-carcinoma-trial-qa-including-automated-treatment-planning-and-benchmark-case-results
#8
Steven J M Habraken, Abdul Wahab M Sharfo, Jeroen Buijsen, Wilko F A R Verbakel, Cornelis J A Haasbeek, Michel C Öllers, Henrike Westerveld, Niek van Wieringen, Onne Reerink, Enrica Seravalli, Pètra M Braam, Markus Wendling, Thomas Lacornerie, Xavier Mirabel, Reinhilde Weytjens, Lieselotte Depuydt, Stephanie Tanadini-Lang, Oliver Riesterer, Karin Haustermans, Tom Depuydt, Roy S Dwarkasing, François E J A Willemssen, Ben J M Heijmen, Alejandra Méndez Romero
BACKGROUND AND PURPOSE: The TRENDY trial is an international multi-center phase-II study, randomizing hepatocellular carcinoma (HCC) patients between transarterial chemoembolization (TACE) and stereotactic body radiation therapy (SBRT) with a target dose of 48-54 Gy in six fractions. The radiotherapy quality assurance (QA) program, including prospective plan feedback based on automated treatment planning, is described and results are reported. MATERIALS AND METHODS: Scans of a single patient were used as a benchmark case...
October 16, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29029891/imaging-findings-within-the-first-12%C3%A2-months-of-hepatocellular-carcinoma-treated-with-stereotactic-body-radiation-therapy
#9
Mishal Mendiratta-Lala, Everett Gu, Dawn Owen, Kyle C Cuneo, Latifa Bazzi, Theodore S Lawrence, Hero K Hussain, Matthew S Davenport
PURPOSE: To correlate the imaging findings of treated hepatocellular carcinoma (HCC) after stereotactic body radiation therapy (SBRT) with explant pathology and alpha-fetoprotein (AFP) response. METHODS AND MATERIALS: From 2007 to 2015, of 146 patients treated with liver SBRT for Barcelona Clinic Liver Cancer stage A hepatocellular carcinoma, 10 were identified with inclusion criteria and had regular interval follow-up magnetic resonance imaging/triple phase computed tomography and explant pathology or declining AFP values for radiology-pathology response correlation...
August 24, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28994665/combining-deep-learning-with-anatomy-analysis-for-segmentation-of-portal-vein-for-liver-sbrt-planning
#10
Bulat Ibragimov, Diego Toesca, Daniel Chang, Albert Koong, Lei Xing
Automated segmentation of portal vein (PV) for liver radiotherapy planning is a challenging task due to potentially low vasculature contrast, complex PV anatomy and image artifacts originated from fiducial markers and vasculature stents. In this paper, we propose a novel framework for automated PV segmentation from computed tomography (CT) images. We apply convolutional neural networks (CNN) to learn consistent appearance patterns of PV using a training set of CT images with reference annotations and then enhance PV in previously unseen CT images...
October 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28992962/the-long-and-short-term-variability-of-breathing-induced-tumor-motion-in-lung-and-liver-over-the-course-of-a-radiotherapy-treatment
#11
Jennifer Dhont, Jef Vandemeulebroucke, Manuela Burghelea, Kenneth Poels, Tom Depuydt, Robbe Van Den Begin, Cyril Jaudet, Christine Collen, Benedikt Engels, Truus Reynders, Marlies Boussaer, Thierry Gevaert, Mark De Ridder, Dirk Verellen
PURPOSE: To evaluate the short and long-term variability of breathing induced tumor motion. MATERIALS AND METHODS: 3D tumor motion of 19 lung and 18 liver lesions captured over the course of an SBRT treatment were evaluated and compared to the motion on 4D-CT. An implanted fiducial could be used for unambiguous motion information. Fast orthogonal fluoroscopy (FF) sequences, included in the treatment workflow, were used to evaluate motion during treatment. Several motion parameters were compared between different FF sequences from the same fraction to evaluate the intrafraction variability...
October 6, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28975835/role-and-future-directions-of-external-beam-radiotherapy-for-primary-liver-cancer
#12
Florence K Keane, Theodore S Hong
The incidence of primary liver cancers continues to increase in the United States and worldwide. The majority of patients with primary liver cancer are not candidates for curative therapies such as surgical resection or orthotopic liver transplantation due to tumor size, vascular invasion, or underlying comorbidities. Therefore, while primary liver cancer is the sixth-most common cancer diagnosis worldwide, it represents the second leading cause of cancer-related deaths. Radiotherapy traditionally played a limited role in the treatment of primary liver cancer due to concerns over hepatic tolerance and the inability to deliver a tumoricidal dose of radiotherapy while still sparing normal hepatic parenchyma...
July 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28975831/stereotactic-body-radiation-therapy-for-hepatocellular-carcinoma-and-intrahepatic-cholangiocarcinoma
#13
Puja S Venkat, Sarah E Hoffe, Jessica M Frakes
The role of external beam radiation therapy for primary liver malignancies has historically been limited due to the risk of radiation-induced liver disease. However, with the advent of stereotactic body radiotherapy (SBRT), we are able to dose escalate while safely sparing critical nearby structures. This review explores the evidence surrounding the use of SBRT for the treatment of primary liver malignancies. A review of the literature was performed. This article discusses the challenges, efficacy, and safety of SBRT for primary liver malignancies in order to conceptualize its role within a multidisciplinary framework...
July 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28954285/phase-ii-study-of-proton-based-stereotactic-body-radiation-therapy-for-liver-metastases-importance-of-tumor-genotype
#14
Theodore S Hong, Jennifer Y Wo, Darrell R Borger, Beow Y Yeap, Erin I McDonnell, Henning Willers, Lawrence S Blaszkowsky, Eunice L Kwak, Jill N Allen, Jeffrey W Clark, Shyam Tanguturi, Lipika Goyal, Janet E Murphy, John A Wolfgang, Lorraine C Drapek, Ronald S Arellano, Harvey J Mamon, John T Mullen, Kenneth K Tanabe, Cristina R Ferrone, David P Ryan, A John Iafrate, Thomas F DeLaney, Andrew X Zhu
Background: We evaluated the efficacy and safety of risk-adapted, proton-based stereotactic body radiation therapy (SBRT) for liver metastases from solid tumors. Methods: This single-arm phase II single institutional study (NCT01239381) included patients with limited extrahepatic disease, 800 mL or greater of uninvolved liver, and no cirrhosis or Child-Pugh A, who had received proton-based SBRT to one to four liver metastases from solid tumors. Treatment comprised 30 to 50 Gray equivalent (GyE) in five fractions based on the effective volume of liver irradiated...
September 1, 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/28951010/spatiotemporal-fractionation-schemes-for-liver-stereotactic-body-radiotherapy
#15
Jan Unkelbach, Dávid Papp, Melissa R Gaddy, Nicolaus Andratschke, Theodore Hong, Matthias Guckenberger
BACKGROUND AND PURPOSE: Dose prescription in stereotactic body radiotherapy (SBRT) for liver tumors is often limited by the mean liver dose. We explore the concept of spatiotemporal fractionation as an approach to facilitate further dose escalation in liver SBRT. MATERIALS AND METHODS: Spatiotemporal fractionation schemes aim at partial hypofractionation in the tumor along with near-uniform fractionation in normal tissues. This is achieved by delivering distinct dose distributions in different fractions, which are designed such that each fraction delivers a high single fraction dose to complementary parts of the tumor while creating a similar dose bath in the surrounding noninvolved liver...
September 23, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28943046/radical-radiation-therapy-for-oligometastatic-breast-cancer-results-of-a-prospective-phase-ii-trial
#16
Marco Trovo, Carlo Furlan, Jerry Polesel, Francesco Fiorica, Stefano Arcangeli, Niccolò Giaj-Levra, Filippo Alongi, Alessandro Del Conte, Loredana Militello, Elena Muraro, Debora Martorelli, Simon Spazzapan, Massimiliano Berretta
BACKGROUND AND PURPOSE: We conducted a prospective phase II multicentric trial to determine if radical radiation therapy to all metastatic sites might improve the progression-free survival (PFS) in oligometastatic breast cancer patients. Secondary endpoints were local control (LC), overall survival (OS) and toxicity. METHODS AND MATERIALS: Inclusion criteria were the following: oligometastatic breast cancer with ≤5 metastatic sites, FDG-PET/CT staging, no brain metastases, primary tumor controlled...
September 21, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28920500/acute-toxicity-of-the-bowel-after-stereotactic-robotic-radiotherapy-for-abdominopelvic-oligometastases
#17
Michael Frelinghuysen, Wilco Schillemans, Lieke Hol, Cornelis Verhoef, Mischa Hoogeman, Joost Jan Nuyttens
AIM: To correlate dose-volume histogram (DVH) parameters with appearance of grade ≥2 acute and late gastrointestinal toxicity of stereotactic body radiotherapy (SBRT) in patients with abdominopelvic solitary or oligometastatic disease outside the liver. MATERIAL AND METHODS: Acute and late bowel toxicity of 84 abdominopelvic oligometastatic patients was registered. A logistic regression was performed between different DVH parameters and presence of grade ≥2 acute and late toxicity...
September 18, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28917253/re-irradiation-with-stereotactic-body-radiation-therapy-sbrt
#18
Morten Høyer
Stereotactic body radiation therapy (SBRT) is a potential treatment option for patients who develop a relapse within or marginal to a previously irradiated volume, but it seems underused because of sparse knowledge on the efficacy and morbidity related to the treatment. Normal tissues often recover some of the damage caused by the primary radiotherapy with time, but the kinetics of recovery is not clearly described in the literature. There is a growing number of publications on SBRT reirradiation, but the literature consists mainly of retrospective cohort studies...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28917250/emerging-technologies-in-stereotactic-body-radiotherapy
#19
Lijun Ma, Lei Wang, Chia-Lin Tseng, Arjun Sahgal
Stereotactic body radiation therapy (SBRT) stems from the initial developments of intra-cranial stereotactic radiosurgery (SRS). Despite similarity in their names and clinical goals of delivering a sufficiently high tumoricidal dose, maximal sparing of the surrounding normal tissues and a short treatment course, SBRT technologies have transformed from the early days of body frame-based treatments with X-ray verification to primarily image-guided procedures with cone-beam CT or stereoscopic X-ray systems and non-rigid body immo-bilization...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28917249/challenges-in-imaging-assessment-following-liver-stereotactic-body-radiotherapy-pitfalls-to-avoid-in-clinical-practice
#20
Connie Yip, Gary J R Cook, Kasia Owczarczyk, Vicky Goh
Stereotactic body radiotherapy (SBRT) is increasingly used in the management of unresectable liver metastases and hepatocellular carcinoma (HCC) as it allows delivery of high-dose conformal radiotherapy with limited toxicities. However, it may be difficult to differentiate viable tumour from radiotherapy-related changes after SBRT. The imaging changes observed after SBRT may also differ from those observed following conventionally fractionated radiotherapy. Hence, we aim to review the imaging changes that occur within the tumour and adjacent normal liver after SBRT which may help to identify local relapse in clinical practice...
September 2017: Chinese Clinical Oncology
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