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Carbon ion radiotherapy

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https://www.readbyqxmd.com/read/28081010/biological-dose-representation-for-carbon-ion-radiotherapy-of-unconventional-fractionation
#1
Nobuyuki Kanematsu, Taku Inaniwa
In carbon-ion radiotherapy, single-beam delivery each day in alternate directions has been common practice for efficient operation, taking advantage of the Bragg peak and the relative biological effectiveness (RBE) for uniform dose conformation to a tumor. Treatments are usually fractionated and treatment plans are evaluated with the total RBE-weighted dose; however, this is of limited relevance to the biological effect. In this study, we reformulate the biologically effective dose (BED) to normalize the dose-fractionation and cell-repopulation effects as well as the RBE of treating radiation, based on inactivation of a reference cell line by a reference carbon-ion radiation...
January 12, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28070729/inhibiting-autophagy-with-chloroquine-enhances-the-anti-tumor-effect-of-high-let-carbon-ions-via-er-stress-related-apoptosis
#2
Xiaogang Zheng, Xiaodong Jin, Feifei Li, Xiongxiong Liu, Yan Liu, Fei Ye, Ping Li, Ting Zhao, Qiang Li
Energetic carbon ions (CI) offer great advantages over conventional radiations such as X- or γ-rays in cancer radiotherapy. High linear energy transfer (LET) CI can induce both endoplasmic reticulum (ER) stress and autophagy in tumor cells under certain circumstances. The molecular connection between ER stress and autophagy in tumor exposed to high-LET radiation and how these two pathways influence the therapeutic effect against tumor remain poorly understood. In this work, we studied the impact of autophagy and apoptosis induced by ER stress following high-LET CI radiation on the radiosensitivity of S180 cells both in vitro and in vivo...
February 2017: Medical Oncology
https://www.readbyqxmd.com/read/28062703/tas-116-a-novel-hsp90-inhibitor-selectively-enhances-radiosensitivity-of-human-cancer-cells-to-x-rays-and-carbon-ion-radiation
#3
Younghyun Lee, Shigeaki Sunada, Hirokazu Hirakawa, Akira Fujimori, Jac A Nickoloff, Ryuichi Okayasu
Hsp90 inhibitors have been investigated as cancer therapeutics in monotherapy and to augment radiotherapy; however, serious adverse effects of early-generation Hsp90 inhibitors limited their development. TAS-116 is a novel Hsp90 inhibitor with lower adverse effects than other Hsp90 inhibitors, and here, we investigated the radiosensitizing effects of TAS-116 in low linear energy transfer (LET) X-ray and high LET carbon ion-irradiated human cancer cells and mouse tumor xenografts. TAS-116 decreased cell survival of both X-ray and carbon ion-irradiated human cancer cell lines (HeLa and H1299 cells), and similar to other Hsp90 inhibitors, it did not affect radiosensitivity of noncancerous human fibroblasts...
January 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28057427/fiducial-marker-matching-versus-vertebral-body-matching-dosimetric-impact-of-patient-positioning-in-carbon-ion-radiotherapy-for-primary-hepatic-cancer
#4
Satoshi Abe, Yoshiki Kubota, Kei Shibuya, Yoshinari Koyama, Takanori Abe, Tatsuya Ohno, Takashi Nakano
PURPOSE: The aim of this study was to compare the dose-volume parameters of fiducial marker matching (MM) with vertebral body matching (VM) in patient positioning for carbon ion radiotherapy for primary hepatic cancer. MATERIALS AND METHODS: Twenty patients with primary hepatic cancer were retrospectively studied to assess changes in reproducibility of tumor position and dose distribution on two CT scans. One was for treatment planning and another was for dose confirmation, acquired the day before the first treatment day...
January 2, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28048697/su-f-t-199-a-new-strategy-for-integrating-photon-with-proton-and-carbon-ion-in-the-treatment-planning
#5
Z Chen, J Wang, W Hu
PURPOSE: The aim of this study was to develop a viable strategy to integrate photon plan and proton/carbon ion plan based on deformable registration. METHODS: Two prostate cancer patients were enrolled in this study. Each patient has 2 CTs, which were input in the Raystation radiotherapy treatment planning system (TPS). CT1 was deformed to the second CT2 using the Hybrid deformation method. The dice similarity coefficient (DSC) parameter was used to evaluate the difference between the actual structures (bladder, rectum and CTV) and the corresponding deformed structures on CT2...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047357/su-f-t-190-homogeneity-study-of-proton-and-heavy-ion-scanning-beams-based-on-different-compositions-of-spot-sizes-fwhm-and-grid-sizes
#6
J Zhao, W Hu, Y Xing, X Wu, Y Li
PURPOSE: Different particle scanning beam delivery systems have different delivery accuracies. This study was performed to determine, for our particle treatment system, an appropriate composition (n=FWHM/GS) of spot size(FWHM) and grid size (GS), which can provide homogenous delivered dose distributions for both proton and heavy ion scanning beam radiotherapy. METHODS: We analyzed the delivery errors of our beam delivery system using log files from the treatment of 28 patients...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047315/su-f-t-124-radiation-biological-equivalent-presentations-oflem-1-and-mkm-approaches-in-the-carbon-ion-radiotherapy
#7
W Hsi, G Jiang, Y Sheng
PURPOSE: To study the correlations of the radiation biological equivalent doses (BED) along depth and lateral distance between LEM-1 and MKM approaches. METHODS: In NIRS-MKM (Microdosimetric Kinetic Model) approach, the prescribed BED, referred as C-Eq, doses aims to present the relative biological effectiveness (RBE) for different energies of carbon-ions on a fixed 10% survival value of HCG cell with respect to convention X-ray. Instead of a fixed 10% survival, the BED doses of LEM-1 (Local Effect Model) approach, referred as X-Eq, aims to present the RBE over the whole survival curve of chordoma-like cell with alpha/beta ratio of 2...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047192/su-c-204-04-irradiation-of-human-cell-lines-using-various-ions
#8
Y Lin, C Tessa, A Rusek, S McMahon, T Kaminuma, K Held
PURPOSE: The purpose of this study is to investigate and quantify the biological effects of ion radiation using several human cell lines. We aim to answer the question of whether carbon ion the most ideal ion species for heavy ion radiotherapy. METHODS: The cells were irradiated at different positions along the pristine Bragg peak of several ions with different atomic number. The biological effectiveness was evaluated using the clonogenic cell survival assay. Irradiation of three human lung cancer cell lines and a fibroblast cell line were undertaken using the charged particle beam at the NASA Space Radiation Laboratory at Brookhaven National Lab...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28043947/five-year-quality-of-life-assessment-after-carbon-ion-radiotherapy-for-prostate-cancer
#9
Katsuya Maruyama, Hiroshi Tsuji, Takuma Nomiya, Hiroyuki Katoh, Hitoshi Ishikawa, Tadashi Kamada, Masaru Wakatsuki, Koichiro Akakura, Jun Shimazaki, Hidefumi Aoyama, Hirohiko Tsujii
The aim of this study was to prospectively assess 5-year health-related quality of life (HRQOL) of patients treated with carbon ion radiotherapy (C-ion RT) for clinically localized prostate cancer. A total of 417 patients received carbon ion radiotherapy at a total dose of 63-66 Gray-equivalents (GyE) in 20 fractions over 5 weeks, and neoadjuvant and adjuvant androgen deprivation therapy (ADT) were administered for intermediate and high-risk patients. A HRQOL assessment was performed at five time points (immediately before the initiation of C-ion RT, immediately after, and at 12, 36 and 60 months after completion of C-ion RT) using Functional Assessment of Cancer Therapy (FACT) questionnaires...
January 1, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28028129/long-term-outcomes-after-carbon-ion-radiotherapy-for-oral-mucosal-malignant-melanoma
#10
Kensuke Naganawa, Masashi Koto, Ryo Takagi, Azusa Hasegawa, Hiroaki Ikawa, Kazuo Shimozato, Tadashi Kamada, Yoshitaka Okamoto
Oral mucosal malignant melanoma (OMM) is extremely rare and has a poor prognosis. Owing to its rarity, it has not yet been possible to establish an optimal treatment modality. The objective of this study was to evaluate the long-term efficacy of carbon-ion radiotherapy (C-ion RT) for OMM. Between 1997 and 2013, 19 patients with OMM were treated with C-ion RT alone. Patient ages ranged from 44 to 84 years (median, 69 years). Nine men and 10 women were included. OMMs were restaged in accordance with the seventh edition of the tumour/node/metastasis (TNM) Staging System of the International Union Against Cancer...
December 26, 2016: Journal of Radiation Research
https://www.readbyqxmd.com/read/28009421/phase-ii-multi-institutional-clinical-trial-on-a-new-mixed-beam-rt-scheme-of-imrt-on-pelvis-combined-with-a-carbon-ion-boost-for-high-risk-prostate-cancer-patients
#11
Giulia Marvaso, Barbara A Jereczek-Fossa, Barbara Vischioni, Delia Ciardo, Tommaso Giandini, Azusa Hasegawa, Federica Cattani, Mauro Carrara, Mario Ciocca, Nice Bedini, Sergio Villa, Sara Morlino, Stefania Russo, Dario Zerini, Sarah Pia Colangione, Costanza Maria Vittoria Panaino, Cristiana Fodor, Luigi Santoro, Emanuele Pignoli, Francesca Valvo, Riccardo Valdagni, Ottavio De Cobelli, Roberto Orecchia
PURPOSE: Definition of the optimal treatment schedule for high-risk prostate cancer is under debate. A combination of photon intensity modulated radiotherapy (IMRT) on pelvis with a carbon ion boost might be the optimal treatment scheme to escalate the dose on prostate and deliver curative dose with respect to normal tissue and quality of dose distributions. In fact, carbon ion beams offer the advantage to deliver hypofractionated radiotherapy (RT) using a significantly smaller number of fractions compared to conventional RT without increasing risks of late effects...
December 2, 2016: Tumori
https://www.readbyqxmd.com/read/28007628/a-dose-escalation-clinical-trial-of-single-fraction-carbon-ion-radiotherapy-for-peripheral-stage-i-non-small-cell-lung-cancer
#12
Naoyoshi Yamamoto, Tadaaki Miyamoto, Mio Nakajima, Masataka Karube, Kazuhiko Hayashi, Hiroshi Tsuji, Hirohiko Tsujii, Tadashi Kamada, Takehiko Fujisawa
PURPOSE: To report initial results ofadose escalation trial of single-fraction carbon-ion radiotherapy (CIRT) for peripheralstage I non-small-cell lung cancer (NSCLC). PATIENTS AND METHODS: Between April, 2003 and February, 2012, 218 patients were treated. The total dose was raised from 28to 50Gy RBE. The patients were 157 males and 61 females with a median age of 75 years. The tumors were 123 T1 and 95 T2. One hundred thirty-four of these patients (61.5%) were medically inoperable...
December 19, 2016: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28007028/phase-i-ii-trial-evaluating-concurrent-carbon-ion-radiotherapy-plus-chemotherapy-for-salvage-treatment-of-locally-recurrent-nasopharyngeal-carcinoma
#13
Lin Kong, Jing Gao, Jiyi Hu, Weixu Hu, Xiyin Guan, Rong Lu, Jiade J Lu
BACKGROUND: After definitive chemoradiotherapy for non-metastatic nasopharyngeal carcinoma (NPC), more than 10% of patients will experience a local recurrence. Salvage treatments present significant challenges for locally recurrent NPC. Surgery, stereotactic ablative body radiotherapy, and brachytherapy have been used to treat locally recurrent NPC. However, only patients with small-volume tumors can benefit from these treatments. Re-irradiation with X-ray-based intensity-modulated radiotherapy (IMXT) has been more widely used for salvage treatment of locally recurrent NPC with a large tumor burden, but over-irradiation to the surrounding normal tissues has been shown to cause frequent and severe toxicities...
December 22, 2016: Chinese Journal of Cancer
https://www.readbyqxmd.com/read/28006083/definitive-carbon-ion-radiotherapy-for-locally-advanced-parotid-gland-carcinomas
#14
Masashi Koto, Azusa Hasegawa, Ryo Takagi, Hiroaki Ikawa, Kensuke Naganawa, Jun-Etsu Mizoe, Keiichi Jingu, Hirohiko Tsujii, Hiroshi Tsuji, Tadashi Kamada, Yoshitaka Okamoto
BACKGROUND: The purpose of this study was to present our evaluation of the safety and efficacy of carbon-ion radiotherapy (C-ion RT) for locally advanced parotid gland carcinomas. METHODS: Clinicopathological features and outcomes were evaluated in 46 patients receiving C-ion RT for parotid gland carcinomas. RESULTS: Sixteen patients had adenoid cystic carcinoma; 8 had adenocarcinoma, 8 had mucoepidermoid carcinoma, and 14 had other carcinomas...
December 22, 2016: Head & Neck
https://www.readbyqxmd.com/read/28003610/the-impact-of-gadolinium-based-contrast-agent-for-carbon-ion-radiotherapy
#15
Nao Mogi, Makoto Sakai, Ryosuke Okada, Yusuke Itabashi, Yasuhiro Fukushima, Yoshiki Kubota, Takayuki Sutou, Takashi Nakano, Tatsuya Ohno
PURPOSE: The contrast agent used in the diagnostic department has high atomic numbers and might influence dose deposition in the particle therapy. In particular, the influence of gadolinium-based (Gd) contrast agent on range in carbon ion radiotherapy has not yet been evaluated. For this reason, we avoid carbon treatment and planning computed tomography (CT) acquisition on days when the contrast-enhanced magnetic resonance image (MRI) is performed. In this study, we evaluated the time required for this beam range effect to vanish by evaluating the temporal changes in the CT values after an enhanced MRI as well as the stopping power of Gd solution...
2016: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/27997377/dose-response-of-ebt3-radiochromic-films-to-proton-and-carbon-ion-clinical-beams
#16
Roberta Castriconi, Mario Ciocca, Alfredo Mirandola, Carla Sini, Sara Broggi, Marco Schwarz, Francesco Fracchiolla, Mária Martišíková, Giulia Aricò, Giovanni Mettivier, Paolo Russo
We investigated the dose-response of the external beam therapy 3 (EBT3) films for proton and carbon ion clinical beams, in comparison with conventional radiotherapy beams; we also measured the film response along the energy deposition-curve in water. We performed measurements at three hadrontherapy centres by delivering monoenergetic pencil beams (protons: 63-230 MeV; carbon ions: 115-400 MeV/u), at 0.4-20 Gy dose to water, in the plateau of the depth-dose curve. We also irradiated the films to clinical MV-photon and electron beams...
December 20, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27990273/advances-in-the-management-of-osteosarcoma
#17
REVIEW
Stefan S Bielack, Stefanie Hecker-Nolting, Claudia Blattmann, Leo Kager
Osteosarcoma, a bone cancer most commonly seen in adolescents and young adults, is usually a high-grade malignancy characterized by a very high risk for the development of pulmonary metastases. High-grade osteosarcomas are usually treated by preoperative and postoperative chemotherapy and surgery, with a very limited number of active agents available. Rarer lower-grade variants such as parosteal and periosteal osteosarcoma or low-grade central osteosarcoma are treated by surgery only. Imaging to search for possible metastases focuses on the lung...
2016: F1000Research
https://www.readbyqxmd.com/read/27925861/modeling-heavy-ion-impairment-of-hippocampal-neurogenesis-after-acute-and-fractionated-irradiation
#18
Eliedonna Cacao, Francis A Cucinotta
Radiation-induced impairment of neurogenesis in the hippocampal dentate gyrus is a concern due to its reported association with cognitive detriments after radiotherapy for brain cancers and the possible risks to astronauts chronically exposed to space radiation. Here, we have extended our recent work in a mouse model of impaired neurogenesis after exposure to low-linear energy transfer (LET) radiation to heavy ion irradiation. To our knowledge, this is the first report of a predictive mathematical model of radiation-induced changes to neurogenesis for a variety of radiation types after acute or fractionated irradiation...
December 2016: Radiation Research
https://www.readbyqxmd.com/read/27911139/volumetric-response-of-intracranial-meningioma-after-photon-or-particle-irradiation
#19
Petra Mozes, Jan Oliver Dittmar, Daniel Habermehl, Eric Tonndorf-Martini, Katalin Hideghety, Anne Dittmar, Jürgen Debus, Stephanie E Combs
BACKGROUND: Meningiomas are usually slow growing, well circumscribed intracranial tumors. In symptom-free cases observation with close follow-up imaging could be performed. Symptomatic meningiomas could be surgically removed and/or treated with radiotherapy. The study aimed to evaluate the volumetric response of intracranial meningiomas at different time points after photon, proton, and a mixed photon and carbon ion boost irradiation. PATIENTS AND METHODS: In Group A 38 patients received proton therapy (median dose: 56 GyE in 1...
December 2, 2016: Acta Oncologica
https://www.readbyqxmd.com/read/27908621/radiotherapy-with-curative-intent-in-patients-with-early-stage-medically-inoperable-non-small-cell-lung-cancer-a-systematic-review
#20
REVIEW
Conrad B Falkson, Emily T Vella, Edward Yu, Medhat El-Mallah, Robert Mackenzie, Peter M Ellis, Yee C Ung
Patients with early-stage non-small-cell lung cancer (NSCLC) who are unable to undergo surgery can be offered radiation therapy (RT). Previously, conventional RT was offered; however, newer techniques such as stereotactic body RT (SBRT) have become available. The objective of the present systematic review was to investigate the effectiveness of RT with curative intent in patients with early-stage medically inoperable NSCLC. MEDLINE, EMBASE, and the Cochrane Library were searched for studies comparing stereotactic RT with curative intent compared with observation or other types of RT for early-stage, medically inoperable, NSCLC...
October 27, 2016: Clinical Lung Cancer
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