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https://www.readbyqxmd.com/read/28442242/dosimetric-analysis-of-liver-toxicity-after-liver-metastasis-stereotactic-body-radiation-therapy
#1
Aisling Barry, Andrew McPartlin, Patricia Lindsay, Lisa Wang, James Brierley, John Kim, Jolie Ringash, Rebecca Wong, Rob Dinniwell, Tim Craig, Laura A Dawson
PURPOSE: The aim of this study is to describe the incidence and type of liver toxicity seen following liver metastases stereotactic body radiation therapy (SBRT) and the corresponding clinical and dosimetric factors associated with toxicity. METHODS AND MATERIALS: Between 2002 and 2009, 81 evaluable patients with liver metastases were treated on 2 prospective studies assessing SBRT, with prescription doses based on the effective liver volume irradiated evaluated...
March 9, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28438215/predicting-liver-sbrt-eligibility-and-plan-quality-for-vmat-and-4%C3%AF-plans
#2
Angelia Tran, Kaley Woods, Dan Nguyen, Victoria Y Yu, Tianye Niu, Minsong Cao, Percy Lee, Ke Sheng
BACKGROUND: It is useful to predict planned dosimetry and determine the eligibility of a liver cancer patient for SBRT treatment using knowledge based planning (KBP). We compare the predictive accuracy using the overlap volume histogram (OVH) and statistical voxel dose learning (SVDL) KBP prediction models for coplanar VMAT to non-coplanar 4π radiotherapy plans. METHODS: In this study, 21 liver SBRT cases were selected, which were initially treated using coplanar VMAT plans...
April 24, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28436210/stereotactic-body-radiotherapy-for-pediatric-hepatocellular-carcinoma-with-central-biliary-obstruction
#3
Susan M Hiniker, Arun Rangaswami, Matthew P Lungren, Avnesh S Thakor, Waldo Concepcion, Kathleen E Balazy, Nataliya Kovalchuk, Sarah S Donaldson
Here, we present the case of a pediatric patient with newly diagnosed hepatocellular carcinoma causing central biliary obstruction and persistently elevated bilirubin of 3.0-4.3 mg/dl despite placement of bilateral internal-external biliary drains. The tumor was not resectable, and the patient was not a candidate for liver transplant due to nodal disease, for chemotherapy due to hyperbilirubinemia, or for local therapies aside from stereotactic body radiotherapy (SBRT). In this report, we discuss the successful use of SBRT in the management of this patient, and its role in allowing the patient to become a candidate for additional therapies...
June 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28433483/functional-image-guided-stereotactic-body-radiation-therapy-planning-for-patients-with-hepatocellular-carcinoma
#4
Uranchimeg Tsegmed, Tomoki Kimura, Takeo Nakashima, Yuko Nakamura, Toru Higaki, Nobuki Imano, Yoshiko Doi, Masahiro Kenjo, Shuichi Ozawa, Yuji Murakami, Kazuo Awai, Yasushi Nagata
The aim of the current planning study is to evaluate the ability of gadoxetate disodium-enhanced magnetic resonance imaging (EOB-MRI)-guided stereotactic body radiation therapy (SBRT) planning by using intensity-modulated radiation therapy (IMRT) techniques in sparing the functional liver tissues during SBRT for hepatocellular carcinoma. In this study, 20 patients with hepatocellular carcinoma were enrolled. Functional liver tissues were defined according to quantitative liver-spleen contrast ratios ≥ 1...
April 19, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28421482/cost-effectiveness-of-stereotactic-radiosurgery-and-stereotactic-body-radiation-therapy-a-critical-review
#5
REVIEW
Nataniel H Lester-Coll, David J Sher
PURPOSE OF REVIEW: This review aims to summarize and appraise published cost-effectiveness studies on stereotactic radiosurgery (SRS) and stereotactic body radiation therapy (SBRT). RECENT FINDINGS: We performed a Medline search of cost-effectiveness studies of SRS, SBRT, and other cancer treatment modalities such as surgery and systemic therapy from 2006 to 2016. We included studies that used both modeling and retrospective review techniques. We excluded studies of benign disease...
June 2017: Current Oncology Reports
https://www.readbyqxmd.com/read/28410779/quantifying-health-utilities-in-patients-undergoing-stereotactic-body-radiation-treatment-for-liver-metastases-for-use-in-future-economic-evaluations
#6
B Warren, P Munoz-Schuffenegger, K K W Chan, W Chu, J Helou, D Erler, H Chung
AIM: Stereotactic body radiation therapy (SBRT) is increasingly used as an option for those with liver metastases. In order to facilitate future economic impact of health technologies, health utility scores may be used. The EuroQOL-5D-3L (EQ-5D) preference-based healthy utility instrument was used to evaluate the impact of treatment with SBRT on health utility scores. MATERIALS AND METHODS: Between August 2013 and October 2014, 31 patients treated with 3-5 fractions of SBRT for liver metastases were enrolled in this study...
April 12, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28366554/comparative-study-of-the-calculated-risk-of-radiation-induced-cancer-after-photon-and-proton-beam-based-radiosurgery-of-liver-metastases
#7
Gracinda Mondlane, Michael Gubanski, Pehr A Lind, Ana Ureba, Albert Siegbahn
INTRODUCTION: The potential of proton therapy to improve the sparing of the healthy tissue has been demonstrated in several studies. However, even small doses delivered to the organs at risk (OAR) may induce long-term detriments after radiotherapy. In this study, we investigated the possibility to reduce the risk of radiation-induced secondary cancers with intensity modulated proton therapy (IMPT), when used for radiosurgery of liver metastases. MATERIAL AND METHODS: Ten patients, previously treated for liver metastases with photon-beam based stereotactic body radiation therapy (SBRT) were retrospectively planned for radiosurgery with IMPT...
March 30, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28363484/radiobiological-parameters-of-liver-and-lung-metastases-derived-from-tumor-control-data-of-3719-metastases
#8
Rainer J Klement
BACKGROUND AND PURPOSE: The radiobiological parameters for liver and lung metastases treated with stereotactic body radiation therapy (SBRT) are poorly defined. This project aimed at estimating these parameters from published tumor control probability (TCP) data, and separately for metastases with colorectal cancer (CRC) and non-CRC histology. MATERIALS AND METHODS: A total of 62 studies with 89 different treatment prescriptions for a total of 3719 metastases were analyzed in a Bayesian framework using four different radiobiological models: The LQ, mLQ, LQ-L and the regrowth model which accounts for tumor regrowth after SBRT...
March 28, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28343896/assessment-of-hepatic-function-decline-after-stereotactic-body-radiation-therapy-for-primary-liver-cancer
#9
Diego A S Toesca, Evan C Osmundson, Rie von Eyben, Jenny L Shaffer, Albert C Koong, Daniel T Chang
PURPOSE: This study aims to determine how the albumin-bilirubin (ALBI) score compares with the Child-Pugh (CP) score for assessing liver function following stereotactic body radiation therapy (SBRT). METHODS AND MATERIALS: In total, 60 patients, 40 with hepatocellular carcinoma (HCC) and 20 with cholangiocarcinoma (CCA), were treated with SBRT. Liver function panels were obtained before and at 1, 3, 6, and 12 months after SBRT. Laboratory values were censored after locoregional recurrence, further liver-directed therapies, or liver transplant...
October 17, 2016: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28341320/gallbladder-toxicity-and-high-dose-ablative-intent-radiation-for-liver-tumors-should-we-constrain-the-dose
#10
Shyam K Tanguturi, Andrzej Niemierko, Jennifer Y Wo, Khanhnhat N Nguyen, Hugh Prichard, Andrew X Zhu, John A Wolfgang, Theodore S Hong
PURPOSE: Little is known about the risk of gallbladder toxicity from hypofractionated (HFXRT) and stereotactic body radiation therapy (SBRT). We report on gallbladder toxicity and attribution to treatment in a prospective series of patients with primary and metastatic liver tumors receiving ablative-intent HFXRT and SBRT with protons. METHODS AND MATERIALS: We evaluated 93 patients with intact gallbladders enrolled in either of 2 trials investigating proton HFXRT and SBRT for primary and metastatic liver tumors from 2009 to 2014...
February 9, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28341061/vmat-plus-a-few-computer-optimized-non-coplanar-imrt-beams-vmat-tested-for-liver-sbrt
#11
Abdul Wahab M Sharfo, Maarten L P Dirkx, Sebastiaan Breedveld, Alejandra Méndez Romero, Ben J M Heijmen
PURPOSE: To propose a novel treatment approach, designated VMAT+, involving addition of <5 IMRT beams with computer-optimized non-coplanar orientations to VMAT, and evaluate it for liver Stereotactic Body Radiation Therapy (SBRT). VMAT+ is investigated as an alternative for (1) coplanar VMAT and (2) multi-beam non-coplanar treatment. METHODS/MATERIALS: For fifteen patients with liver metastases, VMAT+ plans were compared with (1) dual-arc VMAT and (2) 25-beam, non-coplanar treatment with computer-optimized beam orientations (25-NCP)...
April 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28335794/tumor-motion-changes-in-stereotactic-body-radiotherapy-for-liver-tumors-an-evaluation-based-on-four-dimensional-cone-beam-computed-tomography-and-fiducial-markers
#12
Yoshinobu Shimohigashi, Ryo Toya, Tetsuo Saito, Osamu Ikeda, Masato Maruyama, Keisuke Yonemura, Yuji Nakaguchi, Yudai Kai, Yasuyuki Yamashita, Natsuo Oya, Fujio Araki
BACKGROUND: For stereotactic body radiation therapy (SBRT) of liver tumors, tumor motion induced by respiration must be taken into account in planning and treatment. We evaluated whether liver tumor motion at the planning simulation represents liver tumor motion during SBRT, and estimated inter- and intrafractional tumor motion changes in patients undergoing liver SBRT. METHODS: Ten patients underwent four-dimensional cone-beam computed tomography (4D-CBCT) image-guided liver SBRT with abdominal compression (AC) and fiducial markers...
March 23, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28333016/predictors-of-liver-toxicity-following-stereotactic-body-radiation-therapy-for-hepatocellular-carcinoma
#13
Michael Velec, Carol R Haddad, Tim Craig, Lisa Wang, Patricia Lindsay, James Brierley, Anthony Brade, Jolie Ringash, Rebecca Wong, John Kim, Laura A Dawson
PURPOSE: To identify risk factors associated with a decline in liver function after stereotactic body radiation therapy (SBRT) for hepatocellular carcinoma. METHODS AND MATERIALS: Data were analyzed from patients with hepatocellular carcinoma treated on clinical trials of 6-fraction SBRT. Liver toxicity was defined as an increase in Child-Pugh (CP) score ≥2 three months after SBRT. Clinical factors, SBRT details, and liver dose-volume histogram (DVH) parameters were tested for association with toxicity using logistic regression...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333015/role-of-stereotactic-body-radiation-therapy-before-orthotopic-liver-transplantation-retrospective-evaluation-of-pathologic-response-and-outcomes
#14
Edward Michael Mannina, Higinia Rosa Cardenes, Foster D Lasley, Benjamin Goodman, Jennifer Zook, Sandra Althouse, John Alvin Cox, Romil Saxena, Joseph Tector, Mary Maluccio
PURPOSE: To analyze the results of stereotactic body radiation therapy (SBRT) in patients with early-stage, localized hepatocellular carcinoma who underwent definitive orthotopic liver transplantation (OLT). METHODS AND MATERIALS: The subjects of this retrospective report are 38 patients diagnosed with hepatocellular carcinoma who underwent SBRT per institutional phase 1 to 2 eligibility criteria, before definitive OLT. Pre-OLT radiographs were compared with pathologic gold standard...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28306547/synthetic-ct-for-mri-based-liver-stereotactic-body-radiotherapy-treatment-planning
#15
Jeremy S Bredfeldt, Lianli Liu, Mary Feng, Yue Cao, James M Balter
A technique for generating MRI-derived synthetic CT volumes (MRCTs) is demonstrated in support of adaptive liver stereotactic body radiation therapy (SBRT). Under IRB approval, 16 subjects with hepatocellular carcinoma were scanned using a single MR pulse sequence (T1 Dixon). Air-containing voxels were identified by intensity thresholding on T1-weighted, water and fat images. The envelope of the anterior vertebral bodies was segmented from the fat image and fuzzy-C-means (FCM) was used to classify each non-air voxel as mid-density, lower-density, bone, or marrow in the abdomen, with only bone and marrow classified within the vertebral body envelope...
April 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28297461/clinical-experience-with-planning-quality-assurance-and-delivery-of-burst-mode-modulated-arc-therapy
#16
Kristofer Kainz, Douglas Prah, Ergun Ahunbay, X Allen Li
"Burst-mode" modulated arc therapy (hereafter referred to as "mARC") is a form of volumetric-modulated arc therapy characterized by variable gantry rotation speed, static MLCs while the radiation beam is on, and MLC repositioning while the beam is off. We present our clinical experience with the planning techniques and plan quality assurance measurements of mARC delivery. Clinical mARC plans for five representative cases (prostate, low-dose-rate brain, brain with partial-arc vertex fields, pancreas, and liver SBRT) were generated using a Monte Carlo-based treatment planning system...
September 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28274491/stereotactic-body-radiotherapy-for-oligo-metastatic-liver-disease-influence-of-pre-treatment-chemotherapy-and-histology-on-local-tumor-control
#17
R J Klement, M Guckenberger, H Alheid, M Allgäuer, G Becker, O Blanck, J Boda-Heggemann, T Brunner, M Duma, S Gerum, D Habermehl, G Hildebrandt, V Lewitzki, C Ostheimer, A Papachristofilou, C Petersen, T Schneider, R Semrau, S Wachter, N Andratschke
INTRODUCTION: Stereotactic body radiation therapy (SBRT) is applied in the oligometastatic setting to treat liver metastases. However, factors influencing tumor control probability (TCP) other than radiation dose have not been thoroughly investigated. Here we set out to investigate such factors with a focus on the influence of histology and chemotherapy prior to SBRT using a large multi-center database from the German Society of Radiation Oncology. METHODS: 452 SBRT treatments in 363 patients were analyzed after collection of patient, tumor and treatment data in a multi-center database...
March 5, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28257902/stereotactic-body-radiotherapy-versus-tace-or-rfa-as-a-bridge-to-transplant-in-patients-with-hepatocellular-carcinoma-an-intention-to-treat-analysis
#18
G Sapisochin, A Barry, M Doherty, S Fischer, N Goldaracena, Roizar Rosales, Moises Russo, R Beecroft, A Ghanekar, M Bhat, J Brierley, P D Greig, J J Knox, L A Dawson, D R Grant
BACKGROUND AND AIMS: There is limited information on the use of stereotactic body radiotherapy (SBRT) as a bridge to liver transplantation (LT) for HCC and no study comparing its efficacy to transarterial chemoembolization (TACE) and radiofrequency ablation (RFA). We aimed to ascertain the safety and efficacy of SBRT on an intention-to-treat basis compared with TACE and RFA as a bridge to LT in a large cohort of patients with HCC. METHODS: Outcomes between groups were compared from the time of listing and from the time of transplant...
February 28, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28244421/dosimetric-implications-of-residual-tracking-errors-during-robotic-sbrt-of-liver-metastases
#19
Mark Chan, Melanie Grehn, Florian Cremers, Frank-Andre Siebert, Stefan Wurster, Stefan Huttenlocher, Jürgen Dunst, Guido Hildebrandt, Achim Schweikard, Dirk Rades, Floris Ernst, Oliver Blanck
PURPOSE: Although the metric precision of robotic stereotactic body radiation therapy in the presence of breathing motion is widely known, we investigated the dosimetric implications of breathing phase-related residual tracking errors. METHODS AND MATERIALS: In 24 patients (28 liver metastases) treated with the CyberKnife, we recorded the residual correlation, prediction, and rotational tracking errors from 90 fractions and binned them into 10 breathing phases. The average breathing phase errors were used to shift and rotate the clinical tumor volume (CTV) and planning target volume (PTV) for each phase to calculate a pseudo 4-dimensional error dose distribution for comparison with the original planned dose distribution...
March 15, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28202227/phase-i-trial-of-radiation-therapy-and-sorafenib-in-unresectable-liver-metastases
#20
Rebecca B Goody, Anthony M Brade, Lisa Wang, Tim Craig, James Brierley, Robert Dinniwell, Rebecca K S Wong, Charles Cho, John Kim, Zahra Kassam, Jolie Ringash, Jennifer J Knox, Laura A Dawson
BACKGROUND AND PURPOSE: To determine maximum tolerated dose (MTD) and toxicities of sorafenib combined with stereotactic radiotherapy (SBRT) or whole liver radiotherapy (WLRT) in patients with liver metastases. MATERIAL AND METHODS: Eligible patients had unresectable liver metastases. Sorafenib dose was escalated in 2 strata: I - SBRT: effective liver volume irradiated (Veff)<80% (30-60Gy in 6 fractions); II - WLRT: Veff>80% (21.6Gy in 6 fractions). Four weeks of sorafenib, with radiotherapy during weeks 2-3, was delivered at 3 escalating dose levels (200-400mg twice daily)...
February 12, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
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