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Radiation and lungs

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https://www.readbyqxmd.com/read/28817811/downregulation-of-microrna-330-correlates-with-the-radiation-sensitivity-and-prognosis-of-patients-with-brain-metastasis-from-lung-cancer
#1
Li-Peng Jiang, Zhi-Tu Zhu, Yue Zhang, Chun-Yan He
BACKGROUND: The present study sought to explore the role of microRNA-330 (miR-330) in predicting the radiation response and prognosis of patients with brain metastasis (BM) from lung cancer (LC). METHODS: Patients with BM from LC were identified and classified into radiation-sensitive and radiation-resistant groups according to the overall survival rate, local and distant recurrence rate after conventional whole-brain radiation therapy. Quantitative realtime polymerase chain reaction (qRT-PCR) was used to detect miR-330 expression in serum...
August 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28817381/advanced-radiation-dosimetry-phantom-ardos-a-versatile-breathing-phantom-for-4d-radiation-therapy-and-medical-imaging
#2
Natalia Kostiukhina, Dietmar Georg, Sofia Rollet, Peter Kuess, Andrej Sipaj, Piotr Andrzejewski, Hugo Furtado, Ivo Rausch, Wolfgang Lechner, Elisabeth Steiner, Hunor Kertesz, Barbara Knaeusl
A novel breathing phantom was designed for being used in conventional and ion-beam radiotherapy as well as for medical imaging. Accurate dose delivery and patient safety are aimed to be verified for four-dimensional (4D) treatment techniques compensating for breathing-induced tumor motion. The phantom includes anthropomorphic components representing an average human thorax. It consists of real tissue equivalent materials to fulfill the requirements for dosimetric experiments and imaging purposes. The different parts of the torso (lungs, chest wall, and ribs) and the tumor can move independently...
August 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28817195/vertical-off-centering-affects-organ-dose-in-chest-ct-evidence-from-monte-carlo-simulations-in-anthropomorphic-phantoms
#3
Natalia Saltybaeva, Hatem Alkadhi
PURPOSE: The objective of our study was to assess the effect of patient vertical off-centering on organ dose in chest CT with tube current modulation. METHODS: For this purpose, anthropomorphic phantoms representing adult male, female and overweight male were scanned on 192-slice CT scanner at eleven different vertical positions (maximal off-centering ± 5 cm). Monte Carlo simulations were performed for each of the investigated setup, using tube current values extracted from the raw data, in order to obtain 3D dose distributions...
August 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28816167/variabilities-of-magnetic-resonance-imaging-computed-tomography-and-positron-emission-tomography-computed-tomography-based-tumor-and-lymph-node-delineations-for-lung-cancer-radiation-therapy-planning
#4
Kishor Karki, Siddharth Saraiya, Geoffrey D Hugo, Nitai Mukhopadhyay, Nuzhat Jan, Jessica Schuster, Matthew Schutzer, Lester Fahrner, Robert Groves, Kathryn M Olsen, John C Ford, Elisabeth Weiss
PURPOSE: To investigate interobserver delineation variability for gross tumor volumes of primary lung tumors and associated pathologic lymph nodes using magnetic resonance imaging (MRI), and to compare the results with computed tomography (CT) alone- and positron emission tomography (PET)-CT-based delineations. METHODS AND MATERIALS: Seven physicians delineated the tumor volumes of 10 patients for the following scenarios: (1) CT only, (2) PET-CT fusion images registered to CT ("clinical standard"), and (3) postcontrast T1-weighted MRI registered with diffusion-weighted MRI...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28816165/incidence-and-predictors-of-pericardial-effusion-after-chemoradiation-therapy-for-locally-advanced-non-small-cell-lung-cancer
#5
Matthew S Ning, Linglong Tang, Daniel R Gomez, Ting Xu, Yangkun Luo, Jinhai Huo, Elie Mouhayar, Zhongxing Liao
PURPOSE: Findings from Radiation Therapy Oncology Group (RTOG) 0617 suggested that collateral radiation to the heart may contribute to early death in patients receiving chemoradiation therapy for non-small cell lung cancer (NSCLC); however, reports of cardiac toxicity after thoracic radiation therapy (RT) remain limited. Because pericardial disease is the most common cardiac complication of thoracic RT, we investigated the incidence of and risk factors for pericardial effusion (PCE) in patients enrolled in a phase 2 prospective randomized study of intensity modulated RT versus proton therapy for locally advanced NSCLC...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28816162/heart-dosimetry-is-correlated-with-risk-of-radiation-pneumonitis-after-lung-sparing-hemithoracic-pleural-intensity-modulated-radiation-therapy-for-malignant-pleural-mesothelioma
#6
Ellen D Yorke, Andrew Jackson, Li Cheng Kuo, Anthonia Ojo, Kelly Panchoo, Prasad Adusumilli, Marjorie G Zauderer, Valerie W Rusch, Annemarie Shepherd, Andreas Rimner
PURPOSE: To determine clinically helpful dose-volume and clinical metrics correlating with symptomatic radiation pneumonitis (RP) in malignant pleural mesothelioma (MPM) patients with 2 lungs treated with hemithoracic intensity modulated pleural radiation therapy (IMPRINT). METHODS AND MATERIALS: Treatment plans and resulting normal organ dose-volume histograms of 103 consecutive MPM patients treated with IMPRINT (February 2005 to January 2015) to the highest dose ≤50...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28816160/the-impact-of-cardiac-radiation-dosimetry-on-survival-after-radiation-therapy-for-non-small-cell-lung-cancer
#7
S Vivekanandan, D B Landau, N Counsell, D R Warren, A Khwanda, S D Rosen, E Parsons, Y Ngai, L Farrelly, L Hughes, M A Hawkins, J D Fenwick
PURPOSE: The heart receives high radiation doses during radiation therapy of advanced-stage lung cancer. We have explored associations between overall survival, cardiac radiation doses, and electrocardiographic (ECG) changes in patients treated in IDEAL-CRT, a trial of isotoxically escalated concurrent chemoradiation delivering tumor doses of 63 to 73 Gy. METHODS AND MATERIALS: Dosimetric and survival data were analyzed for 78 patients. The whole heart, pericardium, AV node, and walls of left and right atria (LA/RA-Wall) and ventricles (LV/RV-Wall) were outlined on radiation therapy planning scans, and differential dose-volume histograms (dDVHs) were calculated...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28816147/evaluating-which-dose-function-metrics-are-most-critical-for-functional-guided-radiation-therapy
#8
Austin M Faught, Tokihiro Yamamoto, Richard Castillo, Edward Castillo, Jingjing Zhang, Moyed Miften, Yevgeniy Vinogradskiy
PURPOSE: Four-dimensional (4D) computed tomography (CT) ventilation imaging is increasingly being used to calculate lung ventilation and implement functional-guided radiation therapy in clinical trials. There has been little exhaustive work evaluating which dose-function metrics should be used for treatment planning and plan evaluation. The purpose of our study was to evaluate which dose-function metrics best predict for radiation pneumonitis (RP). METHODS AND MATERIALS: Seventy lung cancer patients who underwent 4D CT imaging and pneumonitis grading were assessed...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28816142/vorinostat-and-concurrent-stereotactic-radiosurgery-for-non-small-cell-lung-cancer-brain-metastases-a-phase-1-dose-escalation-trial
#9
Clara Y H Choi, Heather A Wakelee, Joel W Neal, Mary C Pinder-Schenck, Hsiang-Hsuan Michael Yu, Steven D Chang, John R Adler, Leslie A Modlin, Griffith R Harsh, Scott G Soltys
PURPOSE: To determine the maximum tolerated dose (MTD) of vorinostat, a histone deacetylase inhibitor, given concurrently with stereotactic radiosurgery (SRS) to treat non-small cell lung cancer (NSCLC) brain metastases. Secondary objectives were to determine toxicity, local failure, distant intracranial failure, and overall survival rates. MATERIALS AND METHODS: In this multicenter study, patients with 1 to 4 NSCLC brain metastases, each ≤2 cm, were enrolled in a phase 1, 3 + 3 dose escalation trial...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28816141/combined-radiation-therapy-and-immune-checkpoint-blockade-therapy-for-breast-cancer
#10
REVIEW
Zishuo I Hu, Alice Y Ho, Heather L McArthur
PURPOSE: Treatment with checkpoint inhibitors has shown durable responses in a number of solid tumors, including melanoma, lung, and renal cell carcinoma. However, most breast cancers are resistant to monotherapy with checkpoint inhibitors. Radiation therapy (RT) has been shown to have a number of immunostimulatory effects, including priming the immune system, recruiting immune cells to the tumor environment, and altering the immunosuppressive effects of the tumor microenvironment. RT therefore represents a promising adjuvant therapy to checkpoint blockade in breast cancer...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28816140/comparison-between-child-turcotte-pugh-and-albumin-bilirubin-scores-in-assessing-the-prognosis-of-hepatocellular-carcinoma-after-stereotactic-ablative-radiation-therapy
#11
Cheng-Hsiang Lo, Ming-Yueh Liu, Meei-Shyuan Lee, Jen-Fu Yang, Yee-Min Jen, Chun-Shu Lin, Hsing-Lung Chao, Po-Chien Shen, Wen-Yen Huang
PURPOSE: To evaluate the prognostic performance of the Child-Turcotte-Pugh (CTP) score and the albumin-bilirubin (ALBI) score in hepatocellular carcinoma (HCC) patients treated using stereotactic ablative radiation therapy (SABR). METHODS AND MATERIALS: This retrospective study evaluated the data of patients with HCC who underwent SABR between December 2007 and June 2015. We collected pretreatment CTP and ALBI scores and analyzed their correlation with survival and liver toxicity...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28815070/supracarinal-dissection-of-the-oesophagus-and-lymphadenectomy-by-mie
#12
REVIEW
Harushi Osugi, Kousuke Narumiya, Kenji Kudou
Since 1995, video-assisted thoracoscopic oesophagectomy (VATS), according the same surgical principles as the Japanese open surgery, has been completed in 700 patients with oesophageal cancer. Our indication for VATS is (I) no extensive pleural adhesion; (II) no contiguous tumor spread; (III) pulmonary function capable of sustaining single-lung ventilation, and (IV) non radiated patients. We use 4 ports around a 5 cm mini-thoracotomy on 5th intercostal space. We laid emphasis on utilizing magnifying effect of video (5 to 20 magnifications), obtained by positioning the camera at close vicinity to the dissection...
July 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28813624/tp53-mutational-status-and-ros-effect-the-expression-of-the-survivin-associated-radio-adaptive-response
#13
Jeffrey S Murley, Richard C Miller, Ralph R Weichselbaum, David J Grdina
A survivin-associated radio-adaptive response, characterized by increased radiation resistance or sensitization, was induced by exposure to 5 mGy of ionizing radiation and was correlated to the TP53 mutational status of exposed cells. Ten human cancer lines were investigated: colorectal carcinomas HCT116 and RKO [TP53 wild-type (WT)] and their respective TP53 null isogenic lines; breast adenocarcinomas MCF7 (TP53 WT) and MDA-MB-231 (TP53 Mut); lung carcinomas A549 (TP53 WT) and NCI-H1975 (TP53 Mut); and pancreatic carcinomas Hs766T (TP53 WT) and Panc-1 (TP53 Mut)...
August 16, 2017: Radiation Research
https://www.readbyqxmd.com/read/28812301/changing-treatment-paradigms-for-brain-metastases-from-melanoma-part-1-diagnosis-prognosis-symptom-control-and-local-treatment
#14
REVIEW
Vyshak Alva Venur, Pauline Funchain, Rupesh Kotecha, Samuel T Chao, Manmeet S Ahluwalia
Melanoma is the third most common cause of brain metastases, after lung and breast cancer. The management of melanoma brain metastases can be broadly divided into symptom control and therapeutic strategies. Supportive treatments include corticosteroids to reduce peritumoral edema, antiepileptics for seizure control, and medications to preserve cognitive function. Until recently, therapeutic strategies consisted primarily of local treatments, including surgery, whole-brain radiation therapy (WBRT), and stereotactic radiosurgery (SRS)...
August 15, 2017: Oncology (Williston Park, NY)
https://www.readbyqxmd.com/read/28812120/risk-adapted-robotic-stereotactic-body-radiation-therapy-for-inoperable-early-stage-non-small-cell-lung-cancer
#15
Susanne Temming, Martin Kocher, Erich Stoelben, Lars Hagmeyer, De-Hua Chang, Konrad Frank, Khosro Hekmat, Juergen Wolf, Wolfgang W Baus, Robert Semrau, Christian Baues, S Marnitz
PURPOSE: To evaluate efficacy and toxicity of stereotactic body radiation therapy (SBRT) with CyberKnife® (Accuray, Sunnyvale, CA, USA) in a selected cohort of primary, medically inoperable early-stage non-small cell lung cancer (NSCLC) patients. METHODS: From 2012 to 2016, 106 patients (median age 74 years, range 50-94 years) with primary NSCLC were treated with SBRT using CyberKnife®. Histologic confirmation was available in 87 patients (82%). For mediastinal staging, 92 patients (87%) underwent (18)F-fluorodeoxyglucose positron-emission tomography (18-FDG-PET) and/or endobronchial ultrasound (EBUS)-guided lymph node biopsy or mediastinoscopy...
August 15, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28809759/independent-dose-verification-system-with-monte-carlo-simulations-using-topas-for-passive-scattering-proton-therapy-at-the-national-cancer-center-in-korea
#16
Wook-Geun Shin, Mauro Testa, Hak Soo Kim, Jong Hwi Jeong, Se Byeong Lee, Yeon-Joo Kim, Chul Hee Min
For the independent validation of treatment plans, we developed a Monte Carlo (MC)-based patient dose calculation system with the tool for particle simulation (TOPAS) to enable routine and automatic dose recalculation for each patient. The proton beam nozzle was modeled with TOPAS to simulate the therapeutic beam, and MC commissioning was performed by comparing percent depth dose with the measurement. The beam set-up based on the prescribed beam range and modulation width was automated by modifying the vendor-specific method...
August 15, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28809463/dose-escalated-radiation-therapy-is-associated-with-better-overall-survival-in-patients-with-bone-metastases-from-solid-tumors-a-propensity-score-matched-study
#17
Yung-Chih Chou, Chien-Yu Lin, Ping-Ching Pai, Chen-Kan Tseng, Cheng-En Hsieh, Kai-Ping Chang, Cheng-Lung Hsu, Chun-Ta Liao, Chun-Chieh Wang, Shy-Chyi Chin, Tzu-Chen Yen, Tsung-Ying Ho, Ji-Hong Hong, Kin-Fong Lei, Joseph Tung-Chieh Chang, Ngan-Ming Tsang
We aimed to compare the overall survival (OS) of patients with bone metastases (BM) from solid tumors after standard-dose radiotherapy ([RT]; 30 Gy administered in 10 fractions; EQD2Gy  = 32.5 Gy) and dose-escalated RT (EQD2Gy  > 32.5 Gy). We retrospectively reviewed the clinical charts of 1795 patients (median age, 62.3 years; age range, 18-96 years) with BM from solid tumors who were referred for RT to our institute between 2000 and 2013. These patients were assigned to the standard-dose (n = 1125; 63%) and dose-escalated (n = 670; 37%) RT groups...
August 15, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28806010/blastomycosis-and-histoplasmosis-in-a-patient-with-glioblastoma-receiving-temozolomide
#18
Aiham H Jbeli, John Yu
Malignant glioblastoma multiform (GBM) is the most common primary malignancy of the brain in the U.S. Temozolomide (TMZ) is the cornerstone of management along with surgical resection and radiotherapy. Because of the reduction in the CD4+ lymphocyte count as a side effect of TMZ use, this patient population is under risk for opportunistic infections like Pneumocystis jiroveci. A male patient with newly diagnosed glioblastoma multiform presented with non-productive cough and chest pain. Before presentation, the patient received the standard therapy including surgical resection, radiation and TMZ...
October 2016: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28803168/metastatic-cardiac-angiosarcoma-to-the-lung-spine-and-brain-a-case-report-and-review-of-the-literature
#19
Chih-Ta Lin, Katrina Ducis, Suzanne Tucker, Bruce Tranmer
BACKGROUND: Metastatic angiosarcoma to the brain is a rare entity without an established management protocol. CASE DESCRIPTION: The authors describe a case of primary cardiac angiosarcoma with a rare brain metastasis in an adult. This patient underwent successful resection of his brain metastasis and was initiated on only chemotherapy for his systemic disease. The patient did not develop local recurrence. A review of primary and metastatic CNS angiosarcoma, its pathologic features, clinical disease course, treatment strategies and genomics is also described...
August 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28802976/prognostic-factors-associated-with-the-accuracy-of-deformable-image-registration-in-lung-cancer-patients-treated-with-stereotactic-body-radiotherapy
#20
Yasuharu Sugawara, Hidenobu Tachibana, Noriyuki Kadoya, Nozomi Kitamura, Amit Sawant, Keiichi Jingu
We evaluated the accuracy of an in-house program in lung stereotactic body radiation therapy (SBRT) cancer patients, and explored the prognostic factors associated with the accuracy of deformable image registrations (DIRs). The accuracy of the 3 programs which implement the free-form deformation and the B-spline algorithm was compared regarding the structures on 4-dimensional computed tomography (4DCT) image datasets between the peak-inhale and peak-exhale phases. The dice similarity coefficient (DSC) and normalized DSC (NDSC) were measured for the gross tumor volumes from 19 lung SBRT patients...
August 9, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
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