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https://www.readbyqxmd.com/read/29785667/cerebral-autoregulation-in-stroke
#1
REVIEW
Pedro Castro, Elsa Azevedo, Farzaneh Sorond
PURPOSE OF REVIEW: Cerebral autoregulation (CA) is a mechanism that maintains cerebral blood flow constant despite fluctuations in systemic arterial blood pressure. This review will focus on recent studies that measured CA non-invasively in acute cerebrovascular events, a feature unique to the transcranial Doppler ultrasound. We will summarize the rationale for CA assessment in acute cerebrovascular disorders and specifically evaluate the existing data on the value of CA measures in relation to clinical severity, guiding management decisions, and prognostication...
May 21, 2018: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/29781334/surgical-treatment-of-dystonia
#2
Rubens G Cury, Suneil K Kalia, Binit B Shah, Joohi Jimenez-Shahed, L K Prashanth, Elena Moro
Treatment of dystonia should be individualized and tailored to the specific needs of patients. Surgical treatment is an important option in medically refractory cases. Several issues regarding type of the surgical intervention, targets, and predict factors of benefit are still under debate. Areas covered: To date, several clinical trials have proven the benefit and safety of deep brain stimulation (DBS) for inherited and idiopathic isolated dystonia, whereas there is still insufficient evidence in combined and acquired dystonia...
May 21, 2018: Expert Review of Neurotherapeutics
https://www.readbyqxmd.com/read/29780249/-in-vivo-mr-imaging-of-tumor-associated-macrophages-the-next-frontier-in-cancer-imaging
#3
REVIEW
Runze Yang, Susobhan Sarkar, V Wee Yong, Jeff F Dunn
There is a complex interaction between cancer and the immune system. Tumor-associated macrophages (TAMs) can be subverted by the cancer to adopt a pro-tumor phenotype to aid tumor growth. These anti-inflammatory, pro-tumor TAMs have been shown to contribute to a worsened outcome in several different types of cancer. Various strategies aimed at combating the pro-tumor TAMs have been developed. Several therapies, such as oncolytic viral therapy and high-intensity focused ultrasound, have been shown to stimulate TAMs and suppress tumor growth...
2018: Magnetic Resonance Insights
https://www.readbyqxmd.com/read/29780194/ultrasound-assisted-emerging-technologies-for-chemical-processes
#4
Anton A Kiss, Rob Geertman, Matthias Wierschem, Mirko Skiborowski, Bjorn Gielen, Jeroen Jordens, Jinu J John, Tom Van Gerven
The chemical industry has witnessed many important developments during past decades largely enabled by process intensification techniques. Some of them are already proven at commercial scale (e.g. reactive distillation) while others (e.g. ultrasound-assisted extraction/crystallization/reaction) are on their way to becoming the next-generation technologies. This article focuses on the advances of ultrasound (US)-assisted technologies that could lead in the near future to significant improvements in commercial activities...
May 2018: Journal of Chemical Technology and Biotechnology
https://www.readbyqxmd.com/read/29778584/evaluating-the-capacity-of-california-s-publicly-funded-universities-to-provide-medication-abortion
#5
Sarah Raifman, Patricia Anderson, Shelly Kaller, Diane Tober, Daniel Grossman
OBJECTIVE: To explore the capacity of the University of California (UC) and California State University (CSU) student health centers to provide medication abortion (MA), to identify gaps in resources required to implement proposed Senate Bill 320, which would mandate the provision of MA on UC and CSU campuses, and to explore California student health center staff perspectives on the benefits and challenges of providing MA. STUDY DESIGN: UC and CSU student health center (SHC) staff participated in a self-administered online survey; we conducted in-depth data collection including site visits and conference calls at a subset of campuses...
May 17, 2018: Contraception
https://www.readbyqxmd.com/read/29778401/high-intensity-focused-ultrasound-the-fundamentals-clinical-applications-and-research-trends
#6
I A Shehata Elhelf, H Albahar, U Shah, A Oto, E Cressman, M Almekkawy
Diagnostic ultrasound has been clinically used for decades. More recently, high intensity focused ultrasound (HIFU) has been developed for therapeutic use as a non-invasive technique for tissue ablation. HIFU is also being investigated for advanced applications at the cellular level. Under guidance by magnetic resonance or ultrasound imaging, HIFU can achieve precise biological effects in tissue with a high safety profile. In this article, we discuss the basic principles, advantages and limitations of HIFU...
May 17, 2018: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/29778293/determinants-of-physician-sonographer-and-laboratory-productivity-analysis-of-the-third-survey-from-the-american-society-of-echocardiography-committee-on-pediatric-echocardiography-laboratory-productivity
#7
Brian D Soriano, Craig E Fleishman, Andrea M Van Hoever, Bonnie Wright, Beth Printz, Theresa A Tacy, Vivekanand Allada, Wyman W Lai, Sujatha Buddhe, Shubhika Srivastava
BACKGROUND: The American Society of Echocardiography Committee on Pediatric Echocardiography Laboratory Productivity was formed in 2011 to study institutional factors that could influence the clinical productivity of physicians and sonographers in academic pediatric echocardiography laboratories. In the previous two surveys, staff clinical productivity remained stable while total echocardiography volumes increased. This third survey was designed to assess how clinical productivity is associated with laboratory infrastructure elements such as training, administrative tasks, quality improvement, research, and use of focused cardiac ultrasound (FCU)...
May 16, 2018: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29776600/contrast-enhanced-ultrasound-quantifies-the-perfusion-within-tibial-non-unions-and-predicts-the-outcome-of-revision-surgery
#8
Daniel Krammer, Gerhard Schmidmaier, Marc-André Weber, Julian Doll, Christoph Rehnitz, Christian Fischer
Vascularity is one of the factors determining successful bone regeneration. This prospective study focused on quantifying the microperfusion of tibial non-unions with contrast-enhanced ultrasound (CEUS) 12 wk after revision surgery and comparing it with the osseous consolidation at a maximum of 24 mo assessed with standard radiography and computed tomography. Of 36 patients with tibial non-unions, 28 (77.8%) manifested consolidation, and 8 patients required further revision surgery. CEUS revealed significantly higher perfusion in consolidated versus persistent non-unions for all quantification parameters (e...
May 15, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29774894/value-of-diffusion-weighted-imaging-for-monitoring-tissue-change-during-magnetic-resonance-guided-high-intensity-focused-ultrasound-therapy-in-bone-applications-an-ex-vivo-study
#9
Sharon L Giles, Jessica M Winfield, David J Collins, Ian Rivens, John Civale, Gail R Ter Haar, Nandita M deSouza
Background: Magnetic resonance (MR)-guided high-intensity focused ultrasound (HIFU) can palliate metastatic bone pain by periosteal neurolysis. We investigated the value of diffusion-weighted imaging (DWI) for monitoring soft tissue changes adjacent to bone during MR-guided HIFU. We evaluated the repeatability of the apparent diffusion coefficient (ADC) measurement, the temporal evolution of ADC change after sonication, and its relationship with thermal parameters. Methods: Ex-vivo experiments in lamb legs ( n = 8) were performed on a Sonalleve MR-guided HIFU system...
2018: European radiology experimental
https://www.readbyqxmd.com/read/29774832/intense-focus-of-alveolar-echinococcosis-south-kyrgyzstan
#10
Bakhadyr Bebezov, Nurlan Mamashev, Tilek Umetaliev, Iskender Ziadinov, Philip S Craig, Deborah E Joekel, Peter Deplazes, Felix Grimm, Paul R Torgerson
Human alveolar echinococcosis (AE) is a highly pathogenic zoonotic parasitic disease caused by Echinococcus multilocularis. An ultrasound study in southern Kyrgyzstan during 2012 revealed a prevalence of 4.2% probable or confirmed AE and an additional 2.2% possible AE, representing an emerging situation. The risk for probable or confirmed AE was significantly higher in dog owners.
June 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29774822/partial-nephrectomy-in-central-renal-tumors
#11
Sohrab Arora, Craig Rogers
Nephron-sparing surgery, especially through a minimally invasive approach, is increasingly being performed for incidentally detected renal masses with excellent outcomes. Tumors in central location remain a surgical challenge during nephron-sparing surgery. In this chapter, we discuss the minimally invasive management of these tumors, which include complex hilar tumors and endophytic central tumors, with a focus on surgical technique. The key to management of these tumors is to maintain good preoperative hydration, achieving adequate exposure of tumor, and the use of intraoperative ultrasound to plan the resection plane...
May 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29774184/a-systematic-review-of-clinical-value-of-three-dimensional-printing-in-renal-disease
#12
Zhonghua Sun, Dongting Liu
The aim of this systematic review is to analyse current literature related to the clinical value of three-dimensional (3D) printed models in renal disease. A literature search of PubMed and Scopus databases was performed to identify studies reporting the clinical application and usefulness of 3D printed models in renal disease. Fifteen studies were found to meet the selection criteria and were included in the analysis. Eight of them provided quantitative assessments with five studies focusing on dimensional accuracy of 3D printed models in replicating renal anatomy and tumour, and on measuring tumour volume between 3D printed models and original source images and surgical specimens, with mean difference less than 10%...
April 2018: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29773521/-treatment-of-fibroadenomas-by-high-intensity-focused-ultrasound-what-results-review
#13
K Guillez, R Callec, O Morel, T Routiot, C Mezan de Malartic
OBJECTIVES: To assess benefits and adverse effects of high-intensity focused ultrasound (HIFU) as a treatment for fibroadenomas (FA). METHODS: To ensure the quality of the methodology, the PRISMA criteria have been met at all stages of the development of this review. We searched MEDLINE from inception to May 2017, without any restriction. KEYWORDS: fibroadenoma, focused ultrasound, HIFU and fibroadenomata were used. Data were extracted and the results were compared...
May 14, 2018: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/29772066/3d-specific-absorption-rate-estimation-from-high-intensity-focused-ultrasound-sonications-using-the-green-s-function-heat-kernel
#14
Nicholas J Freeman, Henrik Odéen, Dennis L Parker
PURPOSE: Evaluate a numerical inverse Green's function method of deriving specific absorption rates (SARs) from high intensity focused ultrasound (HIFU) sonications given tissue parameters (thermal conductivity, specific heat capacity, and mass density) and 3-D magnetic resonance imaging (MRI) temperature measurements. METHODS: SAR estimates were evaluated using simulations and MR temperature measurements from HIFU sonications. For simulations, a "true" SAR was calculated using the hybrid angular spectrum method for ultrasound simulations...
May 17, 2018: Medical Physics
https://www.readbyqxmd.com/read/29771696/the-future-of-anesthesia-for-interventional-radiology
#15
Annie Amin, Jason Scott Lane
PURPOSE OF REVIEW: To review novel procedures in interventional radiology and describe anesthetic implications. RECENT FINDINGS: Noninvasive treatment options for patients who are nonsurgical candidates are on the rise. The complication rate for patients receiving anesthesia in the interventional radiology suite is higher than other nonoperating room anesthetizing locations. The investigative use of catheter-directed thrombolysis for acute submassive pulmonary embolism will likely lead to an increased demand for anesthesia assistance...
May 15, 2018: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/29770307/which-needle-in-the-treatment-of-thyroid-nodules
#16
REVIEW
Lorenzo Carlo Pescatori, Pierluca Torcia, Luca Nicosia, Giovanni Mauri, Umberto Geremia Rossi, Maurizio Cariati
Thyroid nodules are a common finding in general population, with a prevalence of 20% to 70% at ultrasound (US) examination. Many of them are benign but treatment can be necessary to relief compressive symptoms. In the last years, percutaneous ablations have achieved amazing development in the treatment of thyroid nodules as they provide a minimally invasive but effective approach. We aimed to summarize the main aspects related to treatment of thyroid nodules with radiofrequency ablation (RFA), focusing on the use of different types of needles...
April 2018: Gland Surgery
https://www.readbyqxmd.com/read/29770262/cross-sectional-imaging-of-parotid-gland-nodules-a-brief-practical-guide
#17
REVIEW
Giuseppe Cicero, Tommaso D'angelo, Sergio Racchiusa, Ignazio Salamone, Carmela Visalli, Antonio Bottari, Alfredo Blandino, Silvio Mazziotti
Clinical evaluation and ultrasound examination are the first steps in the evaluation of a patient with a swelling of the parotid region. After the detection of a nodular lesion, cytological or histological confirmation is usually performed to achieve the diagnosis, while the choice of cross-sectional imaging (computed tomography scan and magnetic resonance imaging) may significantly vary from one physician to another, on the basis of the degree of confidence that both radiologist and surgeon have with this kind of imaging...
2018: Journal of Clinical Imaging Science
https://www.readbyqxmd.com/read/29764258/reference-less-mr-thermometry-on-pre-clinical-thiel-human-cadaver-for-liver-surgery-with-mrgfus
#18
Ioannis Karakitsios, Senay Mihcin, Andreas Melzer
PURPOSE: Reference-less MR thermometry can be a promising technique for temperature mapping during liver treatment with Magnetic Resonance-guided Focused Ultrasound (MRgFUS), as it is more robust to breathing motion than Proton Resonance Frequency MR thermometry. However, there is a lack of a pre-clinical model for repeatable testing of reference-less thermometry. The purpose of this work was to verify the explanted Thiel embalmed human liver and whole Thiel embalmed human cadaver for application of a custom made reference-less thermometry algorithm during MRgFUS sonication...
May 15, 2018: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29763486/update-on-noninvasive-body-contouring-techniques
#19
Alexandra K Rzepecki, Aaron S Farberg, Peter W Hashim, Gary Goldenberg
Noninvasive body contouring is the fastest growing area of cosmetic dermatology. It entails the use of specific technology to optimize the definition, smoothness, and shape of the human body in a safe and effective manner. There are currently 4 leading modalities used for noninvasive body contouring: cryolipolysis, radiofrequency, high-intensity focused ultrasound, and laser therapy. This article provides an overview of each modality.
April 2018: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/29761991/-study-of-neuronal-spike-frequency-adaptation-with-transcranial-magneto-acoustical-stimulation
#20
Yi Yuan, Na Pang, Yudong Chen, Hongbao Sun, Xiaoli Li
Transcranial magneto-acoustical stimulation (TMAS), utilizing focused ultrasound and a magnetostatic field to generate an electric current in tissue fluid to regulate the activities of neurons, has high spatial resolution and penetration depth. The neuronal spike-frequency adaptation plays an important role in the treatment of neural information. In this paper, we study the effects of ultrasonic intensity, magnetostatic field intensity and ultrasonic frequency on the neuronal spike-frequency adaptation based on the Ermentrout neuron model...
December 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
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