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https://www.readbyqxmd.com/read/28944490/hybrid-ultrasound-mr-guided-hifu-treatment-method-with-3d-motion-compensation
#1
Zarko Celicanin, Gibran Manasseh, Lorena Petrusca, Klaus Scheffler, Vincent Auboiroux, Lindsey A Crowe, Jean-Noel Hyacinthe, Yutaka Natsuaki, Francesco Santini, Christoph D Becker, Sylvain Terraz, Oliver Bieri, Rares Salomir
PURPOSE: Treatments using high-intensity focused ultrasound (HIFU) in the abdominal region remain challenging as a result of respiratory organ motion. A novel method is described here to achieve 3D motion-compensated ultrasound (US) MR-guided HIFU therapy using simultaneous ultrasound and MRI. METHODS: A truly hybrid US-MR-guided HIFU method was used to plan and control the treatment. Two-dimensional ultrasound was used in real time to enable tracking of the motion in the coronal plane, whereas an MR pencil-beam navigator was used to detect anterior-posterior motion...
September 24, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28943923/specific-expression-of-proton-coupled-oligopeptide-transporter-1-in-primary-hepatocarcinoma-a-novel-strategy-for-tumor-targeted-therapy
#2
Yanxia Gong, Jie Zhang, Xiang Wu, Tao Wang, Jia Zhao, Zhi Yao, Qingyu Zhang, Xi Liu, Xu Jian
Proton-coupled oligopeptide transporter 1 (PEPT1) is a membrane protein which expressed predominantly in intestine and recognized as the target of dietary nutrients (di/tripeptide) or peptidomimetic drug for delivery. The information on the existence of PEPT1 in carcinomas were limited. Our study aimed to investigate the expression profile and transport activity of PEPT1 both in human hepatocarcinoma tissues and cell lines. Western blotting and an immunofluorescence assay revealed the high level of PEPT1 protein expression in hepatocarcinoma Bel-7402, SMMC-7721, HepG2, HEP3B, SK-HEP-1 cell lines...
October 2017: Oncology Letters
https://www.readbyqxmd.com/read/28943076/evidence-based-review-on-the-use-of-proton-therapy-in-lymphoma-from-the-particle-therapy-cooperative-group-ptcog-lymphoma-subcommittee
#3
REVIEW
Yolanda D Tseng, David J Cutter, John P Plastaras, Rahul R Parikh, Oren Cahlon, Michael D Chuong, Katerina Dedeckova, Mohammad K Khan, Shinn-Yn Lin, Lisa A McGee, Eric Yi-Liang Shen, Stephanie A Terezakis, Shahed N Badiyan, Youlia M Kirova, Richard T Hoppe, Nancy P Mendenhall, Mark Pankuch, Stella Flampouri, Umberto Ricardi, Bradford S Hoppe
No abstract text is available yet for this article.
September 21, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28941739/the-influence-of-inter-fractional-anatomy-variation-on-secondary-cancer-risk-estimates-following-radiotherapy
#4
Camilla Hanquist Stokkevåg, Grete May Engeseth, Liv Bolstad Hysing, Kristian Smeland Ytre-Hauge, Ludvig Paul Muren
PURPOSE: In silico studies comparing estimated risks of radiation-induced secondary cancer (SC) are frequently performed in assessment of radiotherapy techniques. Since inter-patient anatomy variations can result in considerable differences in estimated risk we aimed to explore the influence of inter-fractional organ motion patterns on SC risk. METHODS: Volumetric modulated arc therapy (VMAT) and intensity-modulated proton therapy (IMPT) plans were generated on the planning CT (pCT) scans of eight prostate cancer patients...
September 20, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28939229/photon-and-proton-radiation-therapy-utilization-in-a-population-of-more-than-100-million-commercially-insured-patients
#5
Mark R Waddle, Terence T Sio, Holly K Van Houten, Robert L Foote, Sameer R Keole, Steven E Schild, Nadia Laack, Thomas B Daniels, William Crown, Nilay D Shah, Robert C Miller
PURPOSE: To characterize the changes in the use of radiation therapy (RT), specifically proton beam radiation therapy (PBRT), among adult and pediatric patients over a 11-year period in a very large population of insured patients. METHODS AND MATERIALS: We conducted a retrospective analysis of the OptumLabs Data Warehouse claims database of more than 100 million insured US enrollees. Descriptive analyses were undertaken to evaluate the characteristics of patients receiving RT from 2002 to 2012...
August 2, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28939227/long-term-clinical-outcomes-of-pencil-beam-scanning-proton-therapy-for-benign-and-non-benign-intracranial-meningiomas
#6
Fritz R Murray, James W Snider, Alessandra Bolsi, Antony J Lomax, Marc Walser, Ulrike Kliebsch, Ralf A Schneider, Damien C Weber
PURPOSE: To assess and report long-term clinical outcomes regarding local control, overall survival, and toxicity-free survival after pencil beam scanning proton therapy for intracranial meningiomas at a single institution. PATIENTS AND METHODS: Ninety-six patients (male/female, 29/67; median age 52.8 years) with intracranial meningiomas (World Health Organization [WHO] grade 1, n=61 [63.5%]; WHO grade 2, n=33 [34.4%]; WHO grade 3, n=2 [2.1%]) were treated with pencil beam scanning proton therapy (n=53 [55...
August 12, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28938622/profiling-cancer-related-gene-mutations-in-oral-squamous-cell-carcinoma-from-japanese-patients-by-targeted-amplicon-sequencing
#7
Takafumi Nakagaki, Miyuki Tamura, Kenta Kobashi, Ryota Koyama, Hisayo Fukushima, Tomoko Ohashi, Masashi Idogawa, Kazuhiro Ogi, Hiroyoshi Hiratsuka, Takashi Tokino, Yasushi Sasaki
Somatic mutation analysis is a standard practice in the study of human cancers to identify mutations that cause therapeutic sensitization and resistance. We performed comprehensive genomic analyses that used PCR target enrichment and next-generation sequencing on Ion Proton semiconductor sequencers. Forty-seven oral squamous cell carcinoma (OSCC) samples and their corresponding noncancerous tissues were used for multiplex PCR amplification to obtain targeted coverage of the entire coding regions of 409 cancer-related genes (covered regions: 95...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28937021/optimized-high-dose-amoxicillin-proton-pump-inhibitor-dual-therapies-fail-to-achieve-high-cure-rates-in-china
#8
Jia-Li Hu, Jun Yang, Yin-Bin Zhou, Ping Li, Ran Han, Dian-Chun Fang
Background\Aim: Quadruple daily administration of proton-pump inhibitor (PPI) therapy achieves potent acid inhibition, and combined with amoxicillin, with its pharmacodynamic and pharmacokinetic characteristics, may be efficient for Helicobacter pylori eradication. We compared the efficacy of two optimized high-dose dual therapies with a bismuth-containing quadruple regimen for treating H. pylori infection. Rabeprazole dosages for H. pylori eradication were also evaluated. PATIENTS AND METHODS: Treatment-naive and H...
September 2017: Saudi Journal of Gastroenterology: Official Journal of the Saudi Gastroenterology Association
https://www.readbyqxmd.com/read/28937019/failure-of-optimized-dual-proton-pump-inhibitor-amoxicillin-therapy-what-now
#9
EDITORIAL
David Y Graham, Hong Lu, Akiko Shiotani
No abstract text is available yet for this article.
September 2017: Saudi Journal of Gastroenterology: Official Journal of the Saudi Gastroenterology Association
https://www.readbyqxmd.com/read/28935034/persistence-with-dabigatran-therapy-at-2%C3%A2-years-in-patients-with-atrial-fibrillation
#10
Miney Paquette, Lionel Riou França, Christine Teutsch, Hans-Christoph Diener, Shihai Lu, Sergio J Dubner, Chang Sheng Ma, Kenneth J Rothman, Kristina Zint, Jonathan L Halperin, Menno V Huisman, Gregory Y H Lip, Robby Nieuwlaat
BACKGROUND: Guidelines recommend long-term oral anticoagulation therapy for stroke prevention in patients with atrial fibrillation (AF). Treatment discontinuation rates in vitamin K antagonist (VKA)-treated patients are high but may be lower with non-VKA oral anticoagulant agents. OBJECTIVES: The goal of this study was to describe and explore predictors of dabigatran etexilate persistence in patients with newly diagnosed AF over 2 years of follow-up. METHODS: Consecutive patients newly diagnosed with AF and ≥1 stroke risk factor were followed up for 2 years...
September 26, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28934527/proton-mr-spectroscopy-in-patients-with-sleep-related-hypermotor-epilepsy-she-evidence-of-altered-cingulate-cortex-metabolism
#11
Ilaria Naldi, Francesca Bisulli, Claudia Testa, Giovanni Rizzo, Lorenzo Ferri, Laura L Gramegna, Laura Licchetta, Raffaele Lodi, Caterina Tonon, Paolo Tinuper
Study Objectives: To identify structural and/or metabolic alterations in patients with sleep-related hypermotor epilepsy (SHE) using magnetic resonance imaging (MRI) and proton MR spectroscopy (1H-MRS). Methods: Nineteen SHE patients (seven males; 34.7 ± 9.7 years, mean age ± standard deviation) and 17 matched healthy volunteers (seven males; 34.0 ± 8.9 years) were included in the study. In all patients, the diagnosis of SHE was confirmed by video-polysomnographic recording of seizures...
September 1, 2017: Sleep
https://www.readbyqxmd.com/read/28932207/model-based-magnetization-transfer-imaging-markers-to-characterize-patients-and-asymptomatic-gene-carriers-in-huntington-s-disease
#12
Roland Wiest, Jean-Marc Burgunder, Claus Kiefer
BACKGROUND AND PURPOSE: Huntington's disease (HD) is a chronic progressive neurodegenerative disorder with a long presymptomatic period that opens a window for potential therapies aimed at neuroprotection. Neuroimaging offers the potential to monitor disease-related progression of the disease burden (DB) using model-based magnetization transfer imaging. MATERIALS AND METHODS: We have conducted a cross-sectional study to stratify healthy age-matched controls, premanifest and symptomatic HD patients (n = 30) according to their macromolecular depositions in the caudate nucleus...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28931343/impact-of-bowel-gas-and-body-outline-variations-on-total-accumulated-dose-with-intensity-modulated-proton-therapy-in-locally-advanced-cervical-cancer-patients
#13
Thomas Berger, Jørgen Breede Baltzer Petersen, Jacob Christian Lindegaard, Lars Ulrik Fokdal, Kari Tanderup
INTRODUCTION: Density changes occurring during fractionated radiotherapy in the pelvic region may degrade proton dose distributions. The aim of the study was to quantify the dosimetric impact of gas cavities and body outline variations. MATERIAL AND METHODS: Seven patients with locally advanced cervical cancer (LACC) were analyzed through a total of 175 daily cone beam computed tomography (CBCT) scans. Four-beams intensity-modulated proton therapy (IMPT) dose plans were generated targeting the internal target volume (ITV) composed of: primary tumor, elective and pathological nodes...
September 21, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28930292/proton-pump-inhibitors-understanding-the-complications-and-risks
#14
REVIEW
Peter Malfertheiner, Arne Kandulski, Marino Venerito
Proton-pump inhibitors (PPIs) are the most effective therapy for the full spectrum of gastric-acid-related diseases. However, in the past decade, a steadily increasing list of complications following long-term use of PPIs has been reported. Their potent acid-suppressive action induces several structural and functional changes within the gastric mucosa, including fundic gland polyps, enterochromaffin-like cell hyperplasia and hypergastrinaemia, which can be exaggerated in the presence of Helicobacter pylori infection...
September 20, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28930092/a-monte-carlo-study-to-assess-the-effect-of-1-5t-magnetic-fields-on-the-overall-robustness-of-pencil-beam-scanning-proton-radiotherapy-plans-for-prostate-cancer
#15
Christopher Kurz, Guillaume Landry, Andreas Franz Resch, Georgios Dedes, Florian Kamp, Ute Ganswindt, Claus Belka, Bas W Raaymakers, Katia Parodi
Combining magnetic-resonance imaging (MRI) and proton therapy (PT) using pencil-beam scanning (PBS) may improve image-guided radiotherapy. We aimed at assessing the impact of a magnetic field on PBS-PT plan quality and robustness. Specifically, the robustness against anatomical changes and positioning errors in an MRI-guided scenario with a 30 cm radius 1.5 T magnetic field was studied for prostate PT. Five prostate cancer patients with three consecutive CT images (CT1-3) were considered. Single-field uniform dose PBS-PT plans were generated on the segmented CT1 with Monte-Carlo-based treatment planning software for inverse optimization...
September 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28925645/vitamin-b12-deficiency-recognition-and-management
#16
Robert C Langan, Andrew J Goodbred
Vitamin B12 deficiency is a common cause of megaloblastic anemia, various neuropsychiatric symptoms, and other clinical manifestations. Screening average-risk adults for vitamin B12 deficiency is not recommended. Screening may be warranted in patients with one or more risk factors, such as gastric or small intestine resections, inflammatory bowel disease, use of metformin for more than four months, use of proton pump inhibitors or histamine H2 blockers for more than 12 months, vegans or strict vegetarians, and adults older than 75 years...
September 15, 2017: American Family Physician
https://www.readbyqxmd.com/read/28924108/proton-pump-inhibitor-induction-of-gastric-cobblestone-like-lesions-in-the-stomach
#17
Kosuke Takahari, Ken Haruma, Hiroshi Ohtani, Sho Kiyoto, Akifumi Watanabe, Tomoari Kamada, Noriaki Manabe, Yu Hatano
Objective The long-term use of proton pump inhibitors (PPIs) may induce adverse events in many organs, including the stomach. The chronic use of PPIs has been associated with the growth of fundic gland polyps (FGPs) and of gastric black spots. This study assessed the incidence of gastric lesions with cobblestone-like appearance in PPI users. Methods The clinical characteristics and endoscopic findings of patients who underwent upper gastrointestinal endoscopy after using PPIs for at least six months were analyzed...
September 15, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28923870/associations-between-voriconazole-therapeutic-drug-monitoring-toxicity-and-outcome-in-liver-transplant-patients-an-observational-study
#18
Zahra Hashemizadeh, Parisa Badiee, Seyed Ali Malekhoseini, Hadi Raeisi Shahraki, Bita Geramizadeh, Hashem Montaseri
The aim of this study was to investigate the variability of voriconazole plasma level and its relationship with clinical outcomes and adverse events, among liver transplant recipients to optimize the efficacy and safety of their treatment. Liver transplant recipients treated with voriconazole were included and voriconazole trough levels were quantified by the validated high-performance liquid chromatography method. Cytochrome P450 genotypes of CYP2C19 were evaluated in allograft liver tissues. A total of 832 voriconazole trough levels from 104 patients were measured...
September 18, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28922117/magnetic-resonance-mediated-radiofrequency-ablation
#19
Yik-Kiong Hue, Alexander R Guimaraes, Ouri Cohen, Erez Nevo, Abraham Roth, Jerome L Ackerman, Jerome L Ackerman
OBJECTIVE: To introduce magnetic resonance mediated radiofrequency ablation (MR-RFA), in which the MRI scanner uniquely serves both diagnostic and therapeutic roles. In MR-RFA scanner-induced RF heating is channeled to the ablation site via a Larmor frequency RF pickup device and needle system, and controlled via the pulse sequence. METHODS: MR-RFA was evaluated with simulation of electric and magnetic fields to predict the increase in local specific-absorption-rate (SAR)...
September 18, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28921843/potential-proton-and-photon-dose-degradation-in-advanced-head-and-neck-cancer-patients-by-intratherapy-changes
#20
Kristin Stützer, Annika Jakobi, Anna Bandurska-Luque, Steffen Barczyk, Carolin Arnsmeyer, Steffen Löck, Christian Richter
PURPOSE: Evaluation of dose degradation by anatomic changes for head-and-neck cancer (HNC) intensity-modulated proton therapy (IMPT) relative to intensity-modulated photon therapy (IMRT) and identification of potential indicators for IMPT treatment plan adaptation. METHODS: For 31 advanced HNC datasets, IMPT and IMRT plans were recalculated on a computed tomography scan (CT) taken after about 4 weeks of therapy. Dose parameter changes were determined for the organs at risk (OARs) spinal cord, brain stem, parotid glands, brachial plexus, and mandible, for the clinical target volume (CTV) and the healthy tissue outside planning target volume (PTV)...
September 18, 2017: Journal of Applied Clinical Medical Physics
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