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Ultrasound guided regional

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https://www.readbyqxmd.com/read/27913326/delay-and-standard-deviation-beamforming-to-enhance-specular-reflections-in-ultrasound-imaging
#1
Raja Sekhar Bandaru, Anders Rasmus Sornes, Jeroen Hermans, Eigil Samset, Jan D'hooge
Although interventional devices, such as needles, guide wires, and catheters, are best visualized by X-ray, real-time volumetric echography could offer an attractive alternative as it avoids ionizing radiation; it provides good soft tissue contrast, and it is mobile and relatively cheap. Unfortunately, as echography is traditionally used to image soft tissue and blood flow, the appearance of interventional devices in conventional ultrasound images remains relatively poor, which is a major obstacle toward ultrasound-guided interventions...
December 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27900764/a-novel-thyroid-cancer-nodal-map-classification-system-to-facilitate-nodal-localization-and-surgical-management-the-a-to-d-map
#2
Marybeth Cunnane, Natalia Kyriazidis, Dipti Kamani, Amy F Juliano, Hillary R Kelly, Hugh D Curtin, Samuel R Barber, Gregory W Randolph
OBJECTIVES/HYPOTHESIS: To evaluate the effectiveness, reproducibility, and usability of our proposed nodal nomenclature and classification system employed for several years in our high-volume thyroid cancer unit, for the adequate localization and mapping of lymph nodes in thyroid cancer patients with extensive nodal disease. STUDY DESIGN: Retrospective review. METHODS: Thirty-three thyroid cancer patients with extensive nodal disease treated from January 2004 to May 2013 were included in our study...
November 30, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27900453/incidence-grade-and-distribution-of-prostate-cancer-following-transperineal-template-guided-mapping-biopsy-in-patients-with-atypical-small-acinar-proliferation
#3
Gregory S Merrick, Robert W Galbreath, Abbey Bennett, Wayne M Butler, Edward Amamovich
PURPOSE: To evaluate the role of transperineal template-guided mapping biopsy (TTMB) in patients with atypical small acinar proliferation (ASAP) diagnosed via transrectal ultrasound-guided needle biopsy (TRUS). METHODS: In total, 132 consecutive patients with TRUS-diagnosed ASAP underwent TTMB by means of an anatomic-based technique with sampling of 24 biopsy regions. For each of the 24 regions, 1-3 biopsy cores were obtained (depending on prostate size). No patient underwent pre-biopsy MRI imaging...
November 29, 2016: World Journal of Urology
https://www.readbyqxmd.com/read/27897312/the-feasibility-of-micro-ultrasound-as-a-tool-to-image-peripheral-nerves
#4
A Chandra, R Eisma, P Felts, S Munirama, G A Corner, C E M Demore, G McLeod
Despite widespread use of ultrasound imaging to guide needle placement, the incidence of transient and permanent nerve damage as a complication of regional anaesthesia has not changed over the last decade. In view of the controversy surrounding intraneural injection there is a need to understand the structural changes caused by subepineural and subperineural needle penetration. Clinical ultrasound machines do not provide adequate anatomical resolution, and anaesthetists have difficulty judging the precise location of the needle tip relative to the epineurium...
November 29, 2016: Anaesthesia
https://www.readbyqxmd.com/read/27895879/evaluation-of-stress-scores-throughout-radiological-biopsies
#5
Ozlem Turkoglu, Hasan Huseyin Mutlu
BACKGROUND: Ultrasound-guided biopsy procedures are the most prominent methods that increase the trauma, stress and anxiety experienced by the patients. OBJECTIVES: Our goal was to examine the level of stress in patients waiting for radiologic biopsy procedures and determine the stress and anxiety level arising from waiting for a biopsy procedure. PATIENTS AND METHODS: This prospective study included 35 female and 65 male patients who were admitted to the interventional radiology department of Kartal Dr...
October 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27891265/a-unique-case-of-pancreatic-mass-due-to-pancreatic-elastofibromatosis
#6
Abhinav Goyal, Deepanshu Jain, Ishfaq Bhat, Shailender Singh
Elastofibroma is a benign tumor of the musculoskeletal system characterized by the abnormal accumulation of elastinophilic fibers. It has been classically described for subscapular region but has been reported in several musculoskeletal sites over the years and rarely even in the GI tract but never in pancreas. We therefore present the case of a 45-year-old female who presented with intermittent abdominal pain. CT of abdomen revealed 1.4 cm pancreatic neck lesion without peripancreatic lymphadenopathy. Endoscopic ultrasound (EUS) guided FNA was nondiagnostic...
2016: Case Reports in Gastrointestinal Medicine
https://www.readbyqxmd.com/read/27852706/efficacy-of-two-injection-site-localisation-techniques-for-botulinum-toxin-injections-a-single-blind-crossover-randomised-trial-protocol-among-adults-with-hemiplegia-due-to-stroke
#7
Claire Morel, Isabelle Hauret, Nicolas Andant, Armand Bonnin, Bruno Pereira, Emmanuel Coudeyre
INTRODUCTION: Botulinum toxin injections are an effective treatment for limb spasticity following stroke. Different tracking techniques are used for this purpose: palpation, electrostimulation, electromyography and ultrasound. Yet very few studies have compared these different techniques, and none has successfully proved the superior efficacy of ultrasound-guided injections compared to another tracking method. The primary objective of our study was therefore to compare the efficacy of botulinum toxin injections depending on the tracking technique used: ultrasound versus electrostimulation...
November 15, 2016: BMJ Open
https://www.readbyqxmd.com/read/27847972/first-report-of-robot-assisted-transperineal-fusion-versus-off-target-biopsy-in-patients-undergoing-repeat-prostate-biopsy
#8
S Kaufmann, J Mischinger, B Amend, S Rausch, M Adam, M Scharpf, F Fend, U Kramer, M Notohamiprodjo, K Nikolaou, A Stenzl, J Bedke, S Kruck
PURPOSE: To clarify the value of targeted versus off-target biopsies in men with a suspicion of prostate cancer (PC) and a visible lesion in multi-parametric magnetic resonance imaging (mpMRI) using transperineal robot-assisted biopsy. METHODS: Fifty-five consecutive men with one non-palpable suspicious lesion in mpMRI after negative 12-core transrectal ultrasound-guided biopsy were enrolled in 2014-2015. Lesions were scored using the Prostate Imaging Reporting and Data System...
November 15, 2016: World Journal of Urology
https://www.readbyqxmd.com/read/27845218/determination-of-the-role-of-negative-magnetic-resonance-imaging-of-the-prostate-in-clinical-practice-is-biopsy-is-still-necessary
#9
Robert S Wang, Eric H Kim, Joel M Vetter, Kathryn J Fowler, Anup S Shetty, Aaron J Mintz, Niraj G Badhiwala, Robert L Grubb, Gerald L Andriole
OBJECTIVES: To assess the negative predictive value (NPV) of multi-parametric MRI (mpMRI) for detection of prostate cancer (PCa) in routine clinical practice, and to identify characteristics of patients for whom mpMRI fails to detect high-grade (Gleason ≥7) disease. METHODS: We reviewed our prospectively maintained database of consecutive men who received prostate mpMRI at our institution, interpreted by a clinical practice of academic radiologists. Between January 2012 and December 2015, 84 men without any MR suspicious regions (MSRs) according to prior institutional classification, or with PI-RADS 1-2 lesions according to the PI-RADS system, underwent standard template transrectal ultrasound-guided (TRUS) prostate biopsy...
November 11, 2016: Urology
https://www.readbyqxmd.com/read/27843428/a-rare-case-of-gastric-variceal-hemorrhage-secondary-to-infiltrative-b-cell-lymphoma
#10
Adrienne Lenhart, Juan Fernandez-Castillo, Keith Mullins, Reena Salgia
Portal hypertension commonly arises in the setting of advanced liver cirrhosis and is the consequence of increased resistance within the portal vasculature. Less commonly, left-sided noncirrhotic portal hypertension can develop in a patient secondary to isolated obstruction of the splenic vein. We present a rare case of left-sided portal hypertension and isolated gastric varices in a patient with large B-cell lymphoma, who was treated with splenic artery embolization. The patient is a 73-year-old male with no previous history of liver disease, who presented with coffee ground emesis and melena...
September 2016: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/27842565/regional-anesthesia-for-painful-injuries-after-disasters-rapid-study-protocol-for-a-randomized-controlled-trial
#11
Adam C Levine, Carrie Teicher, Adam R Aluisio, Tess Wiskel, Pola Valles, Miguel Trelles, Justin Glavis-Bloom, Rebecca F Grais
BACKGROUND: Lower extremity trauma during earthquakes accounts for the largest burden of disaster-related injuries. Insufficient pain management is common in resource-limited disaster settings, and regional anesthesia (RA) may reduce pain in injured patients beyond current standards of care. To date, no controlled trials have been conducted to evaluate the use of RA for pain management in a disaster setting. METHODS/DESIGN: The Regional Anesthesia for Painful Injuries after Disasters (RAPID) study aims to evaluate whether regional anesthesia (RA), either with or without ultrasound (US) guidance, can reduce pain from earthquake-related lower limb injuries in a disaster setting...
November 14, 2016: Trials
https://www.readbyqxmd.com/read/27836523/-why-and-how-to-perform-an-ultrasound-guided-transversus-abdominis-plane-block-a-step-by-step-approach
#12
E Nohuz, B El Drayi, A Triki, K Grossmannova, B Boudier, K Koffi, M Albaut, C Dualé
Used in clinical practice as part of a multimodal analgesic regimen, the transversus abdominis plane block (TAP block) is a relative novel procedure in which local anaesthetic agents are injected into the anatomic neurofascial space between the internal oblique and the transversus abdominis muscle. It allows a significantly prolonged duration of analgesia during the early postoperative stage in abdominal surgery. This regional anesthesia technique provides analgesia to the skin, muscles of the anterior abdominal wall and parietal peritoneum in order to decrease the incision-related pain...
December 2016: Gynécologie, Obstétrique & Fertilité
https://www.readbyqxmd.com/read/27827415/non-invasive-cardiac-pacing-with-image-guided-focused-ultrasound
#13
Fabrice Marquet, Pierre Bour, Fanny Vaillant, Sana Amraoui, Rémi Dubois, Philippe Ritter, Michel Haïssaguerre, Mélèze Hocini, Olivier Bernus, Bruno Quesson
Currently, no non-invasive cardiac pacing device acceptable for prolonged use in conscious patients exists. High Intensity Focused Ultrasound (HIFU) can be used to perform remote pacing using reversibility of electromechanical coupling of cardiomyocytes. Here we described an extracorporeal cardiac stimulation device and study its efficacy and safety. We conducted experiments ex vivo and in vivo in a large animal model (pig) to evaluate clinical potential of such a technique. The stimulation threshold was determined in 10 different ex vivo hearts and different clinically relevant electrical effects such as consecutive stimulations of different heart chambers with a single ultrasonic probe, continuous pacing or the inducibility of ventricular tachycardia were shown...
November 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27822200/immediate-and-longitudinal-alterations-of-functional-networks-after-thalamotomy-in-essential-tremor
#14
Changwon Jang, Hae-Jeong Park, Won Seok Chang, Chongwon Pae, Jin Woo Chang
Thalamotomy at the ventralis intermedius nucleus has been an effective treatment method for essential tremor, but how the brain network changes immediately responding to this deliberate lesion and then reorganizes afterwards are not clear. Taking advantage of a non-cranium-opening MRI-guided focused ultrasound ablation technique, we investigated functional network changes due to a focal lesion. To classify the diverse time courses of those network changes with respect to symptom-related long-lasting treatment effects and symptom-unrelated transient effects, we applied graph-theoretic analyses to longitudinal resting-state functional magnetic resonance imaging data before and 1 day, 7 days, and 3 months after thalamotomy with essential tremor...
2016: Frontiers in Neurology
https://www.readbyqxmd.com/read/27814289/feasability-of-contrast-enhanced-ultrasound-with-image-fusion-of-ceus-and-ms-ct-for%C3%A2-endovascular-grafting-in-infrarenal-abdominal-aortic-aneurysm-in-a%C3%A2-single-patient
#15
H Zimmermann, J Rübenthaler, P Paprottka, K J Paprottka, M Reiser, D A Clevert
Currently methods to reduce radiation and contrast media application in endovascular repair of aortic aneurysms (EVAR) are investigated. First positive results for real-time contrast medium-enhanced ultrasonography (CEUS) guided endovascular aortic repair have been reported. A combination with image fusion of CEUS and preoperative multi-slice computed tomography (MS-CT) might offer added safety regarding stent-graft positioning and sealing of the landing zones.EVAR was performed in a patient with an asymptomatic infrarenal aortic aneurysm and a penetrating aortic ulcer in the neck region...
November 4, 2016: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/27810365/treatment-of-parkinson-s-disease-in-rats-by-nrf2-transfection-using-mri-guided-focused-ultrasound-delivery-of-nanomicrobubbles
#16
Ling Long, Xiaodong Cai, Ruomi Guo, Ping Wang, Lili Wu, Tinghui Yin, Siyuan Liao, Zhengqi Lu
Parkinson's disease (PD) is a very common neurological disorder. However, effective therapy is lacking. Although the blood-brain-barrier (BBB) protects the brain, it prevents the delivery of about 90% of drugs and nucleotides into the brain, thereby hindering the development of gene therapy for PD. Magnetic resonance imaging (MRI)-guided focused ultrasound delivery of microbubbles enhances the delivery of gene therapy vectors across the BBB and improves transfection efficiency. In the present study, we delivered nuclear factor E2-related factor 2 (Nrf2, NFE2L2) contained in nanomicrobubbles into the substantia nigra of PD rats by MRI-guided focused ultrasound, and we examined the effect of Nrf2 over-expression in this animal model of PD...
October 31, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27810148/introduction-of-a-novel-ultrasound-guided-extrathoracic-sub-paraspinal-block-for-control-of-perioperative-pain-in-nuss-procedure-patients
#17
Robert B Bryskin, Daniel K Robie, Frederick M Mansfield, Eugene B Freid, Siam Sukumvanich
BACKGROUND: A safe and effective method of multilevel thoracic pain control remains an elusive goal in patients undergoing the Nuss procedure. The aim of our study was to develop a nonopioid centered approach using a novel regional technique as part of a quality improvement initiative. METHODS: The proposed ultrasound-guided technique positions multi-perforated soaker catheter deep to the paraspinal muscles from T2 to T11. The project was conducted in two phases...
October 14, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27797095/anaesthesia-for-carotid-endarterectomy-ultrasound-guided-superficial-intermediate-cervical-plexus-block-combined-with-carotid-sheath-infiltration
#18
Paweł Mądro, Alina Dąbrowska, Jarosław Jarecki, Piotr Garba
BACKGROUND: Carotid endarterectomy carries a significant risk of intraoperative brain ischaemia. Various methods for intraoperative cerebral function monitoring can be utilized, but the assessment of the patient's consciousness remains the easiest and most available method, requiring that the patient remain awake and under local/regional anaesthesia. The aim of this study was to compare infiltration anaesthesia with an ultrasound-guided superficial/combined cervical plexus block for patient safety and comfort...
2016: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/27790950/magnetic-resonance-texture-parameters-are-associated-with-ablation-efficiency-in-mr-guided-high-intensity-focussed-ultrasound-treatment-of-uterine-fibroids
#19
Arnaud Hocquelet, Baudouin Denis de Senneville, Nora Frulio, Cécile Salut, Mounir Bouzgarrou, Panteleimon Papadopoulos, Hervé Trillaud
OBJECTIVES: The objective of this study is to assess the association between texture parameter analysis derived from T2-weighted images and efficiency of magnetic resonance-guided focussed ultrasound (MRgFUS) ablation for the treatment of uterine fibroids. MATERIALS AND METHODS: Fifty-five women treated by MRgFUS were included in this retrospective analysis. Texture parameters were calculated using three 2D regions of interest placed on three consecutive slices on the same sagittal 3D T2-weighted images obtained at the beginning of MRgFUS ablation...
October 28, 2016: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/27788199/photoacoustic-imaging-of-cancer-treatment-response-early-detection-of-therapeutic-effect-from-thermosensitive-liposomes
#20
Jonathan P May, Eno Hysi, Lauren A Wirtzfeld, Elijus Undzys, Shyh-Dar Li, Michael C Kolios
Imaging methods capable of indicating the potential for success of an individualized treatment course, during or immediately following the treatment, could improve therapeutic outcomes. Temperature Sensitive Liposomes (TSLs) provide an effective way to deliver chemotherapeutics to a localized tumoral area heated to mild-hyperthermia (HT). The high drug levels reached in the tumor vasculature lead to increased tumor regression via the cascade of events during and immediately following treatment. For a TSL carrying doxorubicin (DOX) these include the rapid and intense exposure of endothelial cells to high drug concentrations, hemorrhage, blood coagulation and vascular shutdown...
2016: PloS One
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