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https://www.readbyqxmd.com/read/28812002/image-guided-thermal-ablation-with-mr-based-thermometry
#1
REVIEW
Mingming Zhu, Ziqi Sun, Chin K Ng
Thermal ablation techniques such as radiofrequency, microwave, high intensity focused ultrasound (HIFU) and laser have been used as minimally invasive strategies for the treatment of variety of cancers. MR thermometry methods are readily available for monitoring thermal distribution and deposition in real time, leading to decrease of incidents of normal tissue damage around targeted lesion. HIFU and laser-induced thermal therapy (LITT) are the two widely accepted tumor ablation techniques because of their compatibility with MR systems...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28811716/development-and-validation-of-a-simple-and-multifaceted-instrument-gerd-test-for-the-clinical-evaluation-of-gastroesophageal-reflux-and-dyspeptic-symptoms
#2
Koji Nakada, Nobuyuki Matsuhashi, Katsuhiko Iwakiri, Atsushi Oshio, Takashi Joh, Kazuhide Higuchi, Ken Haruma
AIM: To evaluate the psychometric properties of a newly developed questionnaire, known as the gastroesophageal reflux and dyspepsia therapeutic efficacy and satisfaction test (GERD-TEST), in patients with GERD. METHODS: Japanese patients with predominant GERD symptoms recruited according to the Montreal definition were treated for 4 wk using a standard dose of proton pump inhibitor (PPI). The GERD-TEST and the Medical Outcome Study Short Form-8 Health Survey (SF-8) were administered at baseline and after 4 wk of treatment...
July 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28810881/comparison-of-photon-volumetric-modulated-arc-therapy-intensity-modulated-proton-therapy-and-intensity-modulated-carbon-ion-therapy-for-delivery-of-hypo-fractionated-thoracic-radiotherapy
#3
Alexander Chi, Lien-Chun Lin, Sijin Wen, Haijuan Yan, Wen-Chien Hsi
PURPOSE: The aim of the present study was to compare the dose distribution generated from photon volumetric modulated arc therapy (VMAT), intensity modulated proton therapy (IMPT), and intensity modulated carbon ion therapy (IMCIT) in the delivery of hypo-fractionated thoracic radiotherapy. METHODS AND MATERIALS: Ten selected patients who underwent thoracic particle therapy between 2015 and 2016 were re-planned to receive a relative biological effectiveness (RBE) weighted dose of 60 Gy (i...
August 15, 2017: Radiation Oncology
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
#4
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/28806981/understanding-the-potentiality-of-accelerator-based-boron-neutron-capture-therapy-for-osteosarcoma-dosimetry-assessment-based-on-the-reported-clinical-experience
#5
Silva Bortolussi, Ian Postuma, Nicoletta Protti, Lucas Provenzano, Cinzia Ferrari, Laura Cansolino, Paolo Dionigi, Olimpio Galasso, Giorgio Gasparini, Saverio Altieri, Shin-Ichi Miyatake, Sara J González
BACKGROUND: Osteosarcoma is the most frequent primary malignant bone tumour, and its incidence is higher in children and adolescents, for whom it represents more than 10% of solid cancers. Despite the introduction of adjuvant and neo-adjuvant chemotherapy that markedly increased the success rate in the treatment, aggressive surgery is still needed and a considerable percentage of patients do not survive due to recurrences or early metastases. Boron Neutron Capture Therapy (BNCT), an experimental radiotherapy, was investigated as a treatment that could allow a less aggressive surgery by killing infiltrated tumour cells in the surrounding healthy tissues...
August 15, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28806270/new-clinical-paradigms-for-treating-and-preventing-antiplatelet-gastrointestinal-bleeding
#6
Neena S Abraham
PURPOSE OF REVIEW: To quantify antiplatelet-related gastrointestinal bleeding (GIB), characterize patients at greatest risk and summarize risk-management strategies emphasizing evolving knowledge in acute management of antiplatelet-related bleeding. RECENT FINDINGS: New paradigms for acute management of antiplatelet-related GIB exist in the domains of resuscitation and the transfusion of blood products, strategic use of proton pump therapy and identification and eradication of Helicobacter pylori...
August 12, 2017: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/28801980/effects-of-proton-pump-inhibitors-and-famotidine-on-elimination-of-plasma-methotrexate-evaluation-of-drug-drug-interactions-mediated-by-organic-anion-transporter-3
#7
Katsuya Narumi, Yu Sato, Masaki Kobayashi, Ayako Furugen, Kumiko Kasashi, Takehiro Yamada, Takanori Teshima, Ken Iseki
Methotrexate (MTX) is an antifolate agent used in the treatment of numerous types of cancer, and eliminated by active tubular secretion via organic anion transporter 3 (OAT3). Gastric antisecretory drugs, such as proton pump inhibitors (PPIs) and histamine H2 receptor antagonists, are widely used among patients with cancer in clinical practice. The aim of the present study was to analyze the potential drug-drug interactions between MTX and gastric antisecretory drugs in high-dose MTX (HD-MTX) therapy. We retrospectively analyzed the impact of PPIs on the plasma MTX concentration on 73 cycles of HD-MTX therapy performed in 43 patients...
August 12, 2017: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/28801587/temozolomide-arrests-glioma-growth-and-normalizes-intratumoral-extracellular-ph
#8
Jyotsna U Rao, Daniel Coman, John J Walsh, Meser M Ali, Yuegao Huang, Fahmeed Hyder
Gliomas maintain an acidic extracellular pH (pHe), which promotes tumor growth and builds resistance to therapy. Given evidence that acidic pHe beyond the tumor core indicates infiltration, we hypothesized that imaging the intratumoral pHe in relation to the peritumoral pHe can provide a novel readout of therapeutic influence on the tumor microenvironment. We used Biosensor Imaging of Redundant Deviation in Shifts (BIRDS), which utilizes chemical shifts of non-exchangeable protons from macrocyclic chelates (e...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800087/imaging-features-of-non-alcoholic-fatty-liver-disease-in-children-and-adolescents
#9
REVIEW
Michele Di Martino, Kameliya Koryukova, Mario Bezzi, Carlo Catalano
Non-invasive diagnosis and quantification of liver steatosis is important to overcome limits of liver biopsy, in order to follow up patients during their therapy and to establish a reference standard that can be used in clinical trials and longitudinal studies. Imaging offers several methods in this setting: ultrasound, which is the cheapest technique and easy to perform; magnetic resonance spectroscopy (MRS), which reflects the real content of triglycerides in a specific volume; and proton density fat fraction (PDFF) magnetic resonance, which is a simple method that reflects the distribution of the fat in the whole liver...
August 11, 2017: Children
https://www.readbyqxmd.com/read/28800034/the-association-of-proton-pump-inhibitor-therapy-and-small-bowel-bacterial-overgrowth-in-children
#10
Agnieszka Sieczkowska, Piotr Landowski, Pawel Zagozdzon, Barbara Kaminska, Carlos Lifschitz
No abstract text is available yet for this article.
August 10, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28799115/remnant-gastropathy-due-to-bile-reflux-after-roux-en-y-gastric-bypass-a-unique-cause-of-abdominal-pain-and-successful-treatment-with-ursodiol
#11
Nitin Kumar, Christopher C Thompson
BACKGROUND: Chronic abdominal pain can occur after Roux-en-Y gastric bypass (RYGB), and can remain unexplained despite extensive investigation. Bile can pool in the gastric remnant and create a bile reflux gastropathy. The aim of this study was to assess gastric remnant findings in patients with RYGB and chronic abdominal pain of unclear etiology, and to determine the effectiveness of ursodiol therapy for patients with confirmed remnant gastropathy. METHODS: All consecutive patients with RYGB and a diagnosis of chronic abdominal pain, and a negative diagnostic workup (including physical examination, routine laboratory work, cross-sectional imaging, and standard upper endoscopy), who underwent device-assisted enteroscopy for evaluation of the gastric remnant, were included...
August 10, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28798983/role-of-aqp9-in-transport-of-monomethyselenic-acid-and-selenite
#12
Xiangrong Geng, Joseph McDermott, Joseph Lundgren, Liu Liu, Kan-Jen Tsai, Jian Shen, Zijuan Liu
AQP9 is an aquaglyceroporin with a very broad substrate spectrum. In addition to its orthodox nutrient substrates, AQP9 also transports multiple neutral and ionic arsenic species including arsenic trioxide, monomethylarsenous acid (MAs(III)) and dimethylarsenic acid (DMA(V)). Here we discovered a new group of AQP9 substrates which includes two clinical relevant selenium species. We showed that AQP9 efficiently transports monomethylselenic acid (MSeA) with a preference for acidic pH, which has been demonstrated in Xenopus laevis oocyte following the overexpression of human AQP9...
August 10, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28782877/insurance-coverage-decisions-for-pediatric-proton-therapy
#13
Eric Ojerholm, Christine E Hill-Kayser
Proton beam therapy (PBT) holds promise for pediatric patients, but level 1 evidence is not available. In this context, we examined insurance coverage decisions at our facility from 2010 to 2015. PBT was initially denied for 11% of pediatric cases. However, nearly all denials were overturned on appeal-a process that often delayed care by more than a week. Despite unfavorable language in coverage policies, real-world decisions were eventual approval in >99% of cases. Payers appear to have largely accepted the current level-of-evidence for pediatric PBT, but all parties spend significant time and resources on appeals...
August 7, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28780717/proton-pump-inhibitors-in-gastroesophageal-reflux-disease-friend-or-foe
#14
REVIEW
C Prakash Gyawali
PURPOSE OF REVIEW: Proton pump inhibitor (PPI) use in gastroesophageal reflux disease (GERD) has been redefined, in light of recent advances highlighting GERD phenotypes that respond to PPIs, and fresh revelations of potential risks of long-term PPI therapy. RECENT FINDINGS: Erosive esophagitis predicts excellent response to PPI therapy, but non-erosive reflux disease (NERD) with abnormal reflux parameters on ambulatory reflux monitoring also demonstrates a similar response...
September 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/28777447/technical-note-using-experimentally-determined-proton-spot-scanning-timing-parameters-to-accurately-model-beam-delivery-time
#15
Jiajian Shen, Erik Tryggestad, James E Younkin, Sameer R Keole, Keith M Furutani, Yixiu Kang, Michael G Herman, Martin Bues
PURPOSE: To accurately model the beam delivery time (BDT) for a synchrotron based proton spot scanning system using experimentally determined beam parameters. METHODS: A model to simulate the proton spot delivery sequences was constructed and BDT was calculated by summing times for layer switch, spot switch and spot delivery. Test plans were designed to isolate and quantify the relevant beam parameters in the operation cycle of the proton beam therapy delivery system...
August 4, 2017: Medical Physics
https://www.readbyqxmd.com/read/28776748/editorial-replacing-standard-proton-pump-inhibitors-with-vonoprazan-may-breathe-new-life-into-triple-therapy-for-helicobacter-pylori
#16
EDITORIAL
A G Fraser
No abstract text is available yet for this article.
September 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28776746/editorial-replacing-standard-proton-pump-inhibitors-with-vonoprazan-may-breathe-new-life-into-triple-therapy-for-helicobacter-pylori-authors-reply
#17
EDITORIAL
Y S Jung, E H Kim, C H Park
No abstract text is available yet for this article.
September 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28775146/inhibition-of-the-v-atpase-by-archazolid-a-a-new-strategy-to-inhibit-emt
#18
Henriette Merk, Philipp Messer, Maximilian A Ardelt, Don C Lamb, Stefan Zahler, Rolf Müller, Angelika M Vollmar, Johanna Pachmayr
Epithelial-mesenchymal transition (EMT) induces tumor-initiating cells (TICs) which account for tumor recurrence, metastasis and therapeutic resistance. Strategies to interfere with EMT are rare but urgently needed to improve cancer therapy. By using the myxobacterial natural compound Archazolid A as a tool, we elucidate the V-ATPase, a multimeric proton pump that regulates lysosomal acidification, as a crucial player in EMT and identify the inhibition of V-ATPase by Archazolid A as promising strategy to block EMT...
August 3, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28774844/assessing-old-and-new-diagnostic-tests-for-gastroesophageal-reflux-disease
#19
Michael F Vaezi, Daniel Sifrim
A detailed critique of objective measurements of gastroesophageal reflux disease (GERD) would improve management of patients suspecting of having reflux, leading to rational selection of treatment and better outcomes. Many diagnostic tests for GERD have been developed over the past decades. We analyze their development, positive- and negative-predictive values, and ability to predict response to treatment. These features are important for development of medical, surgical, and endoscopic therapies for GERD. We discuss the value of available diagnostic tests and review their role in management of patients with persistent reflux symptoms despite adequate medical or surgical treatment...
July 31, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28774218/have-we-reached-proton-beam-therapy-dosimetric-limitations-a-novel-robust-delivery-efficient-and-continuous-spot-scanning-proton-arc-sparc-therapy-is-to-improve-the-dosimetric-outcome-in-treating-prostate-cancer
#20
Xuanfeng Ding, Xiaoqiang Li, An Qin, Jun Zhou, Di Yan, Craig Stevens, Daniel Krauss, Peyman Kabolizdeh
No abstract text is available yet for this article.
August 3, 2017: Acta Oncologica
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