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https://www.readbyqxmd.com/read/29472086/image-quality-of-four-dimensional-cone-beam-computed-tomography-obtained-at-various-gantry-rotation-speeds-for-liver-stereotactic-body-radiation-therapy-with-fiducial-markers
#1
Yoshinobu Shimohigashi, Fujio Araki, Masato Maruyama, Keisuke Yonemura, Yuji Nakaguchi, Yudai Kai, Ryo Toya
In this study, qualities of 4D cone-beam CT (CBCT) images obtained using various gantry rotation speeds (GRSs) for liver stereotactic body radiation therapy (SBRT) with fiducial markers were quantitatively evaluated. Abdominal phantom containing a fiducial marker was moved along a sinusoidal waveform, and 4D-CBCT images were acquired with GRSs of 50-200° min-1 . We obtained the 4D-CBCT projection data from six patients who underwent liver SBRT and generated 4D-CBCT images at GRSs of 67-200° min-1 , by varying the number of projection data points...
January 2018: Physica Medica: PM
https://www.readbyqxmd.com/read/29463958/interfractional-diaphragm-changes-during-breath-holding-in-stereotactic-body-radiotherapy-for-liver-cancer
#2
Daisuke Kawahara, Shuichi Ozawa, Takeo Nakashima, Shintaro Tsuda, Yusuke Ochi, Takuro Okumura, Hirokazu Masuda, Kazunari Hioki, Tathsuhiko Suzuki, Yoshimi Ohno, Tomoki Kimura, Yuji Murakami, Yasushi Nagata
Aim and background: IGRT based on bone matching may produce a large target positioning error in terms of the reproducibility of expiration breath-holding on SBRT for liver cancer. We evaluated the intrafractional and interfractional errors using the diaphragm position at the end of expiration by utilising Abches and analysed the factor of the interfractional error. Materials and methods: Intrafractional and interfractional errors were measured using a couple of frontal kV images, planning computed tomography (pCT) and daily cone-beam computed tomography (CBCT)...
March 2018: Reports of Practical Oncology and Radiotherapy
https://www.readbyqxmd.com/read/29463266/unresectable-hepatic-pecoma-a-rare-malignancy-treated-with-stereotactic-body-radiation-therapy-sbrt-followed-by-complete-resection
#3
Simon Kirste, Gian Kayser, Anne Zipfel, Anca-Ligia Grosu, Thomas Brunner
BACKGROUND: Perivascular epithelioid cell tumors (PEComas) are rare mesenchymal tumors occurring in various anatomic regions. Although diagnostic criteria and treatment management are not established, current treatment options consist of surgery and chemotherapy including mTOR inhibitors. Stereotactic body radiation therapy (SBRT) is a non-invasive ablative treatment which has shown excellent control rates for more common types of unresectable liver tumors and metastases. In this report we present a rare case of PEComa of the liver that was treated by stereotactic radiotherapy followed by resection...
February 20, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29450985/effect-of-secondary-electron-generation-on-dose-enhancement-in-lipiodol-with-and-without-a-flattening-filter
#4
Daisuke Kawahara, Shuichi Ozawa, Akito Saito, Tomoki Kimura, Tatsuhiko Suzuki, Masato Tsuneda, Sodai Tanaka, Takeo Nakashima, Yoshimi Ohno, Yuji Murakami, Yasushi Nagata
PURPOSE: Lipiodol, which was used in transcatheter arterial chemoembolization before liver stereotactic body radiation therapy (SBRT), remains in SBRT. Previous we reported the dose enhancement in Lipiodol using 10 MV (10×) FFF beam. In this study, we compared the dose enhancement in Lipiodol and evaluated the probability of electron generation (PEG) for the dose enhancement using flattening filter (FF) and flattening filter free (FFF) beams. METHODS: FF and FFF for 6 MV (6×) and 10× beams were delivered by TrueBeam...
February 15, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29439707/stereotactic-body-radiotherapy-sbrt-for-liver-metastasis-clinical-outcomes-from-the-international-multi-institutional-rssearch%C3%A2-patient-registry
#5
Anand Mahadevan, Oliver Blanck, Rachelle Lanciano, Anuj Peddada, Srinath Sundararaman, David D'Ambrosio, Sanjeev Sharma, David Perry, James Kolker, Joanne Davis
BACKGROUND: Stereotactic body radiotherapy (SBRT) is an emerging treatment option for liver metastases in patients unsuitable for surgery. We investigated factors associated with clinical outcomes for liver metastases treated with SBRT from a multi-center, international patient registry. METHODS: Patients with liver metastases treated with SBRT were identified in the RSSearch® Patient Registry. Patient, tumor and treatment characteristics associated with treatment outcomes were assessed...
February 13, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29432550/strategies-for-prediction-and-mitigation-of-radiation-induced-liver-toxicity
#6
Diego A S Toesca, Bulat Ibragimov, Amanda J Koong, Lei Xing, Albert C Koong, Daniel T Chang
Although well described in the 1960s, liver toxicity secondary to radiation therapy, commonly known as radiation-induced liver disease (RILD), remains a major challenge. RILD encompasses two distinct clinical entities, a 'classic' form, composed of anicteric hepatomegaly, ascites and elevated alkaline phosphatase; and a 'non-classic' form, with liver transaminases elevated to more than five times the reference value, or worsening of liver metabolic function represented as an increase of 2 or more points in the Child-Pugh score classification...
February 8, 2018: Journal of Radiation Research
https://www.readbyqxmd.com/read/29423821/the-emerging-role-of-stereotactic-radiotherapy-in-gastrointestinal-malignancies-a-review-of-the-literature-and-analysis-from-the-irish-perspective
#7
Siobhra O'Sullivan, Daniel N Cagney
Primary and secondary malignancies of the liver and pancreas result in significant morbidity and mortality, with increasing incidence and increasing demands on health services worldwide. Surgery is the only curative single modality of treatment and remains the gold standard. Unfortunately, up to 80% of the patients present with unresectable disease, and so, alternative efficacious local and systemic treatments are needed. Technologic advances in radiotherapy over recent decades have meant that precision high-dose treatment with stereotactic body radiotherapy (SBRT) has emerged as a viable cost-effective outpatient-based treatment in the management of these difficult to treat abdominal malignancies...
February 8, 2018: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29423737/aggressive-and-multidisciplinary-local-approach-to-iterative-recurrences-of-colorectal-liver-metastases
#8
Luca Viganò, Vittorio Pedicini, Tiziana Comito, Carlo Carnaghi, Guido Costa, Dario Poretti, Ciro Franzese, Nicola Personeni, Daniele Del Fabbro, Lorenza Rimassa, Marta Scorsetti, Armando Santoro, Luigi Solbiati, Guido Torzilli
BACKGROUND: Liver resection (LR) of colorectal metastases is associated with high recurrence risk. Aggressive local retreatment is advocated, but further recurrences may occur. Poor is known about presentation, treatment, and outcome of iterative recurrences. METHODS: A series of 323 consecutive patients undergoing first LR in the period 2004-2013 was reviewed. Patients with recurrence were included. Any local treatment (surgery, radiofrequency ablation (RFA) and stereotactic body radiation therapy (SBRT)) was analyzed...
February 8, 2018: World Journal of Surgery
https://www.readbyqxmd.com/read/29413273/safety-and-efficacy-of-accelerated-hypofractionation-and-stereotactic-body-radiation-therapy-for-hepatocellular-carcinoma-patients-with-varying-degrees-of-hepatic-impairment
#9
Nima Nabavizadeh, Joseph G Waller, Robert Fain, Yiyi Chen, Catherine R Degnin, David A Elliott, Brandon T Mullins, Ishan A Patel, Brandon A Dyer, Kareem Fakhoury, Willscott E Naugler, Khashayar Farsad, James A Tanyi, Martin Fuss, Charles R Thomas, Arthur Y Hung
PURPOSE: To report the toxicities and outcomes for stereotactic body radiation therapy (SBRT) and accelerated hypofractionated radiation therapy (AHRT) in patients with Child-Pugh (CP) class A, B, or C and albumin-bilirubin (ALBI) score 1, 2, or 3 hepatocellular carcinoma. METHODS AND MATERIALS: We retrospectively reviewed the data from 146 patients with hepatocellular carcinoma who had undergone SBRT (50 Gy in 5 fractions) or AHRT (45 Gy in 18 fractions). The primary endpoint was liver toxicity, defined as an increase in the CP score of ≥2 within 6 months of radiation therapy...
March 1, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29405637/impact-of-audiovisual-biofeedback-on-interfraction-respiratory-motion-reproducibility-in-liver-cancer-stereotactic-body-radiotherapy
#10
Sean Pollock, Regina Tse, Darren Martin, Lisa McLean, Melissa Pham, David Tait, Reuben Estoesta, Grant Whittington, Jessica Turley, Christopher Kearney, Gwi Cho, Robin Hill, Sheila Pickard, Paul Aston, Kuldeep Makhija, Ricky O'Brien, Paul Keall
INTRODUCTION: Irregular breathing motion exacerbates uncertainties throughout a course of radiation therapy. Breathing guidance has demonstrated to improve breathing motion consistency. This was the first clinical implementation of audiovisual biofeedback (AVB) breathing guidance over a course of liver stereotactic body radiotherapy (SBRT) investigating interfraction reproducibility. METHODS: Five liver cancer patients underwent a screening procedure prior to CT sim during which patients underwent breathing conditions (i) AVB, or (ii) free breathing (FB)...
February 2018: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/29404626/direct-dose-correlation-of-mri-morphologic-alterations-of-healthy-liver-tissue-after-robotic-liver-sbrt
#11
Judit Boda-Heggemann, Anika Jahnke, Mark K H Chan, Leila S Ghaderi Ardekani, Peter Hunold, Jost Philipp Schäfer, Stefan Huttenlocher, Stefan Wurster, Dirk Rades, Guido Hildebrandt, Frank Lohr, Jürgen Dunst, Frederik Wenz, Oliver Blanck
PURPOSE: For assessing healthy liver reactions after robotic SBRT (stereotactic body radiotherapy), we investigated early morphologic alterations on MRI (magnetic resonance imaging) with respect to patient and treatment plan parameters. PATIENTS AND METHODS: MRI data at 6-17 weeks post-treatment from 22 patients with 42 liver metastases were analyzed retrospectively. Median prescription dose was 40 Gy delivered in 3-5 fractions. T2- and T1-weighted MRI were registered to the treatment plan...
February 5, 2018: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/29394842/-stereotactic-body-radiotherapy-for-liver-metastasis-of-gastric-cancer
#12
So Katayanagi, Yousuke Makuuchi, Hiroaki Osakabe, Masatoshi Shigoka, Tetsuo Sumi, Akihiko Tsuchida, Shigeyuki Kawachi
Case 1: A 69-year-old man underwent distal gastrectomy in September 2007 for type 2 gastric cancer with liver metastasis (S5). After the operation, we administered chemotherapy. After that, we performed partial hepatectomy in July 2008. After hepatectomy, liver metastases appeared as 2 lesions in February 2009. Thus, we administered another type of chemotherapy. The effect of the chemotherapy was not favorable. Therefore, SBRT was performed for the liver metastases in December. After SBRT, he did not present with any recurrent tumors...
November 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29374726/clinical-assessment-of-micro-residual-tumors-during-stereotactic-body-radiation-therapy-for-hepatocellular-carcinoma
#13
Kenji Uemoto, Hiroshi Doi, Hiroya Shiomi, Koichi Yamada, Daisaku Tatsumi, Taku Yasumoto, Masaaki Takashina, Masahiko Koizumi, Ryoong-Jin Oh
BACKGROUND: This study aimed to assess the need to consider microscopic invasion in terms of treatment planning in stereotactic body radiation therapy (SBRT) for hepatocellular carcinoma and elucidate the appropriate clinical target volume (CTV) margin. PATIENTS AND METHODS: A total of 121 patients (with 146 liver tumors) who underwent SBRT between July 2007 and August 2016 were analyzed, regarding overall survival and local control (LC). RESULTS: The 2- and 5-year LC rates were 91...
February 2018: Anticancer Research
https://www.readbyqxmd.com/read/29374681/stereotactic-body-radiation-therapy-for-liver-tumors-current-status-and-perspectives
#14
REVIEW
Hiroshi Doi, Naohito Beppu, Kazuhiro Kitajima, Kozo Kuribayashi
Surgical resection is the standard therapy for solitary primary or metastatic liver tumors. However, liver tumors are often unresectable at diagnosis and hepatectomy is invasive. Local therapies, such as radiofrequency ablation, are used instead, which can be challenging. Recent advances in modern radiotherapy, including stereotactic body radiation therapy (SBRT), have increased the use of radiotherapy as a curative modality. SBRT delivers ablative high doses of irradiation in small volumes. SBRT for liver tumors provided local control with potential survival benefits in patients with inoperable status...
February 2018: Anticancer Research
https://www.readbyqxmd.com/read/29366521/a-prospective-study-of-the-safety-and-efficacy-of-liver-stereotactic-body-radiotherapy-in-patients-with-and-without-prior-liver-directed-therapy
#15
Dominic H Moon, Andrew Z Wang, Joel E Tepper
BACKGROUND AND PURPOSE: To evaluate the safety and efficacy of liver stereotactic body radiotherapy (SBRT), and examine potential factors impacting outcomes including prior liver-directed therapy. MATERIALS AND METHODS: Patients with ECOG 0-1, Child-Pugh Class A or B, and primary hepatocellular carcinoma (HCC) or liver metastases unsuitable for surgical resection or ablation were eligible for a prospective single arm trial. SBRT was delivered with a CyberKnife system to 45 Gy in 3 fractions with a predetermined dose de-escalation scheme...
January 20, 2018: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29359031/hepatocellular-carcinoma-with-child-pugh-a-cirrhosis-treated-with-stereotactic-body-radiotherapy
#16
Shaakir Hasan, Ngoc Thai, Tadahiro Uemura, Vijay Kudithipudi, Paul Renz, Stephen Abel, Alexander V Kirichenko
AIM: To evaluate the control, survival, and hepatic function for Child Pugh (CP)-A patients after Stereotactic body radiotherapy (SBRT) in hepatocellular carcinoma (HCC). METHODS: From 2009 to 2016, 40 patients with Barcelona Liver Clinic (BCLC) stages 0-B HCC and CP-A cirrhosis completed liver SBRT. The mean prescription dose was 45 Gy (40 to 50 Gy in 4-5 fractions). Local relapse, defined as recurrence within the planning target volume was assessed with intravenous multiphase contrast computed tomography or magnetic resonance imaging every 4-6 mo after completion of SBRT...
December 27, 2017: World Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/29357886/modelling-the-immunosuppressive-effect-of-liver-sbrt-by-simulating-the-dose-to-circulating-lymphocytes-an-in-silico-planning-study
#17
L Basler, N Andratschke, S Ehrbar, M Guckenberger, S Tanadini-Lang
BACKGROUND: Tumor immune-evasion and associated failure of immunotherapy can potentially be overcome by radiotherapy, which however also has detrimental effects on tumor-infiltrating and circulating lymphocytes (CL). We therefore established a model to simulate the radiation-dose delivered to CL. METHODS: A MATLAB-model was established to quantify the CL-dose during SBRT of liver metastases by considering the factors: hepatic blood-flow, -velocity and transition-time of individual hepatic segments, as well as probability-based recirculation...
January 22, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29353652/modeling-of-normal-tissue-complications-using-imaging-and-biomarkers-after-radiation-therapy-for-hepatocellular-carcinoma
#18
Issam El Naqa, Adam Johansson, Dawn Owen, Kyle Cuneo, Yue Cao, Martha Matuszak, Latifa Bazzi, Theodore S Lawrence, Randall K Ten Haken
PURPOSE: To develop normal tissue complications (NTCP) models for hepatocellular cancer (HCC) patients who undergo liver radiation therapy (RT) and to evaluate the potential role of functional imaging and measurement of blood-based circulating biological markers before and during RT to improve the performance of these models. METHODS AND MATERIALS: The data from 192 HCC patients who had undergone RT from 2005 to 2014 were evaluated. Of the 192 patients, 146 had received stereotactic body RT (SBRT) and 46 had received conventional RT to a median physical tumor dose of 49...
February 1, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29351303/automated-inverse-optimization-facilitates-lower-doses-to-normal-tissue-in-pancreatic-stereotactic-body-radiotherapy
#19
Ivaylo B Mihaylov, Eric A Mellon, Raphael Yechieli, Lorraine Portelance
PURPOSE: Inverse planning is trial-and-error iterative process. This work introduces a fully automated inverse optimization approach, where the treatment plan is closely tailored to the unique patient anatomy. The auto-optimization is applied to pancreatic stereotactic body radiotherapy (SBRT). MATERIALS AND METHODS: The automation is based on stepwise reduction of dose-volume histograms (DVHs). Five uniformly spaced points, from 1% to 70% of the organ at risk (OAR) volumes, are used...
2018: PloS One
https://www.readbyqxmd.com/read/29334232/stereotactic-body-radiation-therapy-sbrt-for-hepatocellular-carcinoma-imaging-evaluation-post-treatment
#20
Trenton Kellock, Teresa Liang, Alison Harris, Devin Schellenberg, Roy Ma, Stephen Ho, Wan Wan Yap
Surgical resection, when feasible, is the standard of care for hepatocellular carcinoma (HCC). However, many tumors are not resectable at the time of diagnosis. Recently, stereotactic body radiation therapy (SBRT) has emerged as a non-invasive local therapy for both non-resectable primary hepatic malignancies as well as hepatic metastases. Knowledge of the expected hepatic parenchymal appearance post treatment, as well as potential pitfalls and complications, is essential for accurate evaluation of treatment response...
January 15, 2018: British Journal of Radiology
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