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Ultrasound

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https://www.readbyqxmd.com/read/28927209/intraoperative-imaging-in-traumatic-peripheral-nerve-lesions-correlating-histologic-cross-sections-with-high-resolution-ultrasound
#1
S Shelby Burks, Iahn Cajigas, Jean Jose, Allan D Levi
BACKGROUND: Intraoperative ultrasound (US) has been used as a guide during surgery to better identify deep neuroanatomical structures. OBJECTIVE: To correlate histologic cross-sections from nerve samples taken at the time of surgery with axial, high-resolution US images at similar locations and validate this important tool for intraoperative guidance in nerve surgery. METHODS: Three subjects undergoing nerve repair procedures after traumatic nerve injuries were enrolled prospectively...
April 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28927107/comparison-of-the-effectiveness-of-ultrasound-elastography-with-that-of-conventional-ultrasound-for-differential-diagnosis-of-thyroid-lesions-with-suspicious-ultrasound-features
#2
Jinru Yang, Yan Song, Wei Wei, Litao Ruan, Hong Ai
Ultrasound elastography (USE) has been used for quantitative imaging since the early 1990s. The aim of the present study was to compare the effectiveness of USE with that of conventional ultrasound in the differential diagnosis of benign vs. malignant thyroid nodules. USE was performed on 150 thyroid nodules in 123 patients. USE demonstrated a lower grade of elasticity (grade I/II) in 86% of benign nodules and a decreased strain ratio (2.30±1.01) compared with malignant nodules. USE of malignant nodules exhibited a higher grade of elasticity (grade III/IV) in 90% of nodules and an increased strain ratio (6...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927039/an-unexpected-invasive-hydatidiform-mole-in-a-rudimentary-uterine-horn-a-case-report
#3
Manfei Si, Peng Li, Zeng Yuan, Hui Ma, Baoxia Cui, Beihua Kong
Rudimentary horns of the uterus develop as a result of a partial non-development of one Müllerian duct, a type of congenital uterine anomaly. Pregnancy in a rudimentary horn is uncommon and the outcome tends to be poor, with the majority of cases resulting in rupture between 10 and 15 gestational weeks, with significant risk of morbidity and mortality. Regardless of the availability of imagiological procedures and the advances being made in this field, the diagnosis of this type of ectopic pregnancy often only occurs during laparotomy or laparoscopy subsequent to abdominal pain and collapse...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926968/weakening-pin-bone-attachment-in-fish-fillets-using-high-intensity-focused-ultrasound
#4
Martin H Skjelvareid, Svein Kristian Stormo, Kristín Anna Þórarinsdóttir, Karsten Heia
High Intensity Focused Ultrasound (HIFU) can be used for the localized heating of biological tissue through the conversion of sound waves into heat. Although originally developed for human medicine, HIFU may also be used to weaken the attachment of pin bones in fish fillets to enable easier removal of such bones. This was shown in the present study, where a series of experiments were performed on HIFU phantoms and fillets of cod and salmon. In thin objects such as fish fillets, the heat is mainly dissipated at the surfaces...
September 18, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28926772/ultrasound-assisted-interaction-between-chlorin-e6-and-human-serum-albumin-ph-dependence-singlet-oxygen-production-and-formulation-effect
#5
Mihaela N Mocanu, Fei Yan
The interaction between chlorin e6 (Ce6) and human serum albumin (HSA) in the presence and absence of ultrasound have been investigated by ultraviolet-visible absorption spectroscopy and fluorescence spectroscopy. Ce6 is found to bind strongly to HSA at or near physiological pH conditions, but the strength of the binding is significantly weakened at lower pHs. The intrinsic fluorescence of HSA is incrementally quenched with increasing concentration of Ce6, and the quenching is enhanced after exposure to high-frequency ultrasound...
September 13, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28926605/assessment-of-common-somatic-mutations-of-egfr-kras-braf-nras-in-pulmonary-non-small-cell-carcinoma-using-iplex%C3%A2-hs-a-new-highly-sensitive-assay-for-the-massarray%C3%A2-system
#6
Bobbie C Sutton, Ryan T Birse, Kevin Maggert, Tammy Ray, Jessica Hobbs, Amobi Ezenekwe, Jason Kazmierczak, Michael Mosko, Joan Kish, Andrew Bullock, Zonggao Shi, M Sharon Stack, Darryl Irwin
Increased early detection and personalized therapy for lung cancer have coincided with greater use of minimally invasive sampling techniques such as endobronchial ultrasound-guided biopsy (EBUS), endoscopic ultrasound-guided biopsy (EUS), and navigational biopsy, as well as thin needle core biopsies. As many lung cancer patients have late stage disease and other comorbidities that make open surgical procedures hazardous, the least invasive biopsy technique with the highest potential specimen yield is now the preferred first diagnostic study...
2017: PloS One
https://www.readbyqxmd.com/read/28926507/point-of-care-ultrasound-could-streamline-the-emergency-department-workflow-of-clinically-nonspecific-intussusception
#7
Jung Heon Kim, Jeong-Yong Lee, Jae Hyun Kwon, Hyung-Rae Cho, Jong Seung Lee, Jeong-Min Ryu
OBJECTIVES: The aim of this study was to evaluate whether point-of-care ultrasound (POCUS) for intussusception screening streamlines the workflow of clinically nonspecific intussusception (CNI), an intussusception presenting with only 1 manifestation of the classic triad, and/or vomiting. METHODS: We reviewed 274 consecutive children with intussusception, aged 6 years or younger, who visited a tertiary care hospital emergency department between May 2012 and April 2016...
September 18, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28926412/endoscopic-ultrasound-and-related-technologies-for-the-diagnosis-and-treatment-of-pancreatic-disease-research-gaps-and-opportunities-summary-of-a-national-institute-of-diabetes-and-digestive-and-kidney-diseases-workshop
#8
Linda S Lee, Dana K Andersen, Reiko Ashida, William R Brugge, Mimi I Canto, Kenneth J Chang, Suresh T Chari, John DeWitt, Joo Ha Hwang, Mouen A Khashab, Kang Kim, Michael J Levy, Kevin McGrath, Walter G Park, Aatur Singhi, Tyler Stevens, Christopher C Thompson, Mark D Topazian, Michael B Wallace, Sachin Wani, Irving Waxman, Dhiraj Yadav, Vikesh K Singh
A workshop was sponsored by the National Institute of Diabetes and Digestive and Kidney Diseases to address the research gaps and opportunities in pancreatic endoscopic ultrasound (EUS). The event occurred on July 26, 2017 in 4 sessions: (1) benign pancreatic diseases, (2) high-risk pancreatic diseases, (3) diagnostic and therapeutics, and (4) new technologies. The current state of knowledge was reviewed, with identification of numerous gaps in knowledge and research needs. Common themes included the need for large multicenter consortia of various pancreatic diseases to facilitate meaningful research of these entities; to standardize EUS features of different pancreatic disorders, the technique of sampling pancreatic lesions, and the performance of various therapeutic EUS procedures; and to identify high-risk disease early at the cellular level before macroscopic disease develops...
September 18, 2017: Pancreas
https://www.readbyqxmd.com/read/28926387/magnetic-resonance-guided-focused-ultrasound-versus-conventional-radiation-therapy-for-painful-bone-metastasis-a-matched-pair-study
#9
Hsin-Lun Lee, Chia-Chun Kuo, Jo-Ting Tsai, Chun-You Chen, Meng-Huang Wu, Jeng-Fong Chiou
BACKGROUND: Magnetic resonance-guided focused ultrasound (MRgFUS) is an alternative local therapy for patients with painful bone metastasis for whom standard conventional radiation therapy (RT) has failed. However, the therapeutic effects of MRgFUS as a first-line treatment for bone metastasis remain uncertain. METHODS: A matched-pair study was conducted to compare the therapeutic effects of MRgFUS with those of conventional RT as a first-line treatment for patients with painful bone metastasis...
September 20, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28926276/polypyrrole-coated-perfluorocarbon-nanoemulsions-as-a-sono-photoacoustic-contrast-agent
#10
David Shicheng Li, Soon Joon Yoon, Ivan Pelivanov, M Frenz, Matthew O'Donnell, Lilo D Pozzo
A new contrast agent for combined photoacoustic and ultrasound imaging is presented. It has a liquid perfluorocarbon (PFC) core of about 250 nm diameter coated by a 30 nm thin polypyrrole (PPy) doped polymer shell emulsion which represents a broadband absorber covering the visible and near-infrared ranges (peak optical extinction at 1050 nm). When exposed to a sufficiently high intensity optical or acoustic pulse, the droplets vaporize to form microbubbles providing a strong increase in imaging sensitivity and specificity...
September 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/28926263/copper-sulfide-perfluorocarbon-nanodroplets-as-clinically-relevant-photoacoustic-ultrasound-imaging-agents
#11
Daniela Y Santiesteban, Diego S Dumani, Daniel Profili, Stanislav Y Emelianov
We have developed laser-activated perfluorocarbon nanodroplets containing copper sulfide nanoparticles (CuS NPs) for contrast-enhanced ultrasound and photoacoustic imaging. As potential clinical contrast agents, CuS NPs have favorable properties including biocompatibility, biodegradability and enhance contrast in photoacoustic images at clinically relevant depths. However, CuS NPs are not efficient optical absorbers when compared to plasmonic nanoparticles and therefore, contrast enhancement with CuS NPs is limited, requiring high concentrations to generate images with sufficient signal-to-noise ratio...
September 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/28925747/protocol-and-quality-assurance-for-carotid-imaging-in-100-000-participants-of-uk-biobank-development-and-assessment
#12
Sean Coffey, Adam J Lewandowski, Steve Garratt, Rudy Meijer, Steven Lynum, Ram Bedi, James Paterson, Mohammad Yaqub, J Alison Noble, Stefan Neubauer, Steffen E Petersen, Naomi Allen, Cathie Sudlow, Rory Collins, Paul M Matthews, Paul Leeson
Background Ultrasound imaging is able to quantify carotid arterial wall structure for the assessment of cerebral and cardiovascular disease risks. We describe a protocol and quality assurance process to enable carotid imaging at large scale that has been developed for the UK Biobank Imaging Enhancement Study of 100,000 individuals. Design An imaging protocol was developed to allow measurement of carotid intima-media thickness from the far wall of both common carotid arteries. Six quality assurance criteria were defined and a web-based interface (Intelligent Ultrasound) was developed to facilitate rapid assessment of images against each criterion...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28925570/first-trimester-screening-based-on-ultrasound-and-cfdna-vs-first-trimester-combined-screening-a-randomized-controlled-study
#13
Karl Oliver Kagan, Fabrina Sroka, Jiri Sonek, Harald Abele, Kai Lüthgens, Maximilian Schmid, Philipp Wagner, Sara Brucker, Diethelm Wallwiener, Markus Hoopmann
OBJECTIVE: Prospective randomized trial to compare the performance of first trimester combined screening (FTCS) with an approach that uses the combination of a detailed ultrasound examination and cfDNA analysis. METHODS: Pregnant women with a normal first-trimester ultrasound examination at 11 to 13 weeks' gestation (fetal NT ≤3.5 mm and no fetal defects) were randomized into two groups. In the first group, the risk of aneuploidy was assessed using FTCS based on the most recent FMF UK algorithm...
September 19, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28925529/cerebrovascular-response-to-the-cold-pressor-test-the-critical-role-of-carbon-dioxide
#14
Michael M Tymko, Thijs P Kerstens, Kevin W Wildfong, Philip N Ainslie
In addition to increasing sympathetic nervous activity, blood pressure, and cerebral blood flow (CBF), the cold pressor test (CPT) stimulates pain receptors, which may increase ventilation above metabolic demand; this response likely reduces the partial pressure of end-tidal carbon dioxide (PET CO2 ), and will attenuate elevations in CBF. We hypothesized: (1) CPT would elicit hyperventilation, effectively lowering PET CO2 ; (2) the CBF response will be elevated during an isocapnic (controlled PET CO2 ), compared to a poikilocapnic CPT (uncontrolled PET CO2 ); (3) In response to CPT, the common carotid artery (CCA) will vasodilatate, while the internal carotid artery (ICA) will remain unchanged to help regulate CBF...
September 19, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28925086/optimizing-hepatic-venous-outflow-reconstruction-for-hepatic-vein-stenosis-with-indwelling-stent-in-living-donor-liver-retransplantation
#15
Takanobu Shigeta, Seisuke Sakamoto, Kengo Sasaki, Hajime Uchida, Soichi Narumoto, Akinari Fukuda, Mureo Kasahara
The patient was a boy of 7 years and 5 months of age, who underwent LDLT for acute liver failure at 10 months of age. HV stent placement was performed 8 months after LDLT because of intractable HV stenosis. At 7 years of age, his liver function deteriorated due to chronic rejection. The patient therefore underwent living donor liver retransplantation from his father. The HV was transected with the stent in situ. The IVC was resected due to stenosis. The pericardial cavity was opened and detached around the IVC to elongate the IVC...
September 18, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28925053/extracorporeal-membrane-oxygenation-can-save-lives-in-children-with-heart-or-lung-failure-after-liver-transplantation
#16
Sandrine Jean, Christophe Chardot, Mehdi Oualha, Carmen Capito, Olivier Bustarret, Philippe Pouard, Sylvain Renolleau, Florence Lacaille, Laurent Dupic
The risk of cardiac or lung failure after liver transplantation (LT) is significant. In rare cases, the usual intensive care techniques fail to maintain organ oxygenation with a risk of multiorgan dysfunction. Although extracorporeal membrane oxygenation (ECMO) is a difficult and risky procedure, it can be proposed as life-saving. Four children with either acute pulmonary (three) or cardiac (one) failure after LT, and the criteria that decided the use of ECMO (level of ventilation and results, dosage of inotropic drugs, cardiac ultrasound, blood lactate) were retrospectively reported...
September 2017: Artificial Organs
https://www.readbyqxmd.com/read/28924977/performing-lung-ultrasound-at-rest-and-or-after-an-exercise-stress-test-to-better-identify-high-risk-ambulatory-patients-with-heart-failure
#17
EDITORIAL
Nicolas Girerd, Patrick Rossignol
No abstract text is available yet for this article.
September 18, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28924943/iodized-oil-transarterial-chemoembolization-and-radiofrequency-ablation-for-small-periportal-hepatocellular-carcinoma-comparison-with-nonperiportal-hepatocellular-carcinoma
#18
Sang Yub Lee, Dongho Hyun, Sung Ki Cho, Sung Wook Shin, Sin-Ho Jung, Sang Ah Chi
PURPOSE: This study aims to evaluate the treatment outcomes of iodized oil transarterial chemoembolization (TACE) and subsequent radiofrequency ablation (RFA) for small (≤3 cm) periportal hepatocellular carcinoma (HCC) compared with nonperiportal HCC. METHODS: Twenty-three patients [periportal group (PG); mean age, 59.8 years; 22 men, 1 woman] with periportal HCC (in contact with the portal vein >3 mm in diameter) and 279 patients [nonperiportal group (NPG); mean age, 59...
September 18, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28924922/assessing-the-non-tumorous-liver-implications-for-patient-management-and-surgical-therapy
#19
Pallavi Pandey, Ankur Pandey, Mary Dillhoff, Carl Schmidt, Ihab R Kamel, Timothy M Pawlik
INTRODUCTION: Hepatic resection is performed for various benign and malignant liver tumors. Over the last several decades, there have been improvements in the surgical technique and postoperative care of patients undergoing liver surgery. Despite this, liver failure following an extended hepatic resection remains a critical potential postoperative complication. Patients with underlying parenchymal liver diseases are at particular risk of liver failure due to impaired liver regeneration with an associated mortality risk as high as 60 to 90%...
September 18, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28924863/evaluation-of-deep-myometrial-invasion-in-endometrial-cancer-patients-is-dual-energy-ct-an-option
#20
Stefania Rizzo, Marco Femia, Davide Radice, Maria Del Grande, Dorella Franchi, Daniela Origgi, Valentina Buscarino, Alberto Mauro, Massimo Bellomi
OBJECTIVES: Assessment of deep (>50%) myometrial invasion by dual-energy CT (DECT) and Trans-Vaginal US (TVUS) in patients with endometrial cancer. METHODS: We retrospectively enrolled patients with endometrial cancer who underwent DECT and TVUS for pre-surgical staging. Three sets of images were evaluated: 70 keV (routine CT images), 50 keV, and iodine-water reconstructions. The gold standard was pathology after surgery. The agreement between the different imaging modalities and the gold standard was estimated...
September 18, 2017: La Radiologia Medica
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