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Contrast enhanced ultrasound

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https://www.readbyqxmd.com/read/29792185/assessment-of-the-use-of-contrast-enhanced-ultrasound-in-guiding-microdissection-testicular-sperm-extraction-in-nonobstructive-azoospermia
#1
Shijun Zhang, Jing Du, Ruhui Tian, Shaowei Xie, Fenghua Li, Zheng Li
BACKGROUND: The aim of this study is to assess the value of contrast-enhanced ultrasound (CEUS) as a new non-invasive approach to locate the testicular area in which spermatogenesis is most likely to be found in non-obstructive azoospermic testes and to evaluate the accuracy of CEUS as a predictor of successful sperm retrieval. METHODS: CEUS was performed in 120 nonobstructive azoospermia (NOA) patients. Microdissection testicular sperm extraction (M-TESE) was performed on the best and poorest perfusion areas selected by CEUS and on conventional areas...
May 23, 2018: BMC Urology
https://www.readbyqxmd.com/read/29790488/monitoring-after-radiofrequency-ablation-of-liver-tumors-contrast-enhanced-ultrasound-ceus-vs-contrast-enhanced-computer-tomography-cect-two-days-after-procedure
#2
Eva Korcakova, Hynek Mirka, Vaclav Liska, Petr Hosek, Kristyna Bajcurova
AIM: Our research evaluated the ability of contrast-enhanced ultrasound (CEUS) and contrast enhanced computer tomography (CECT), performed 48 h after radiofrequency ablation (RFA), to detect residual tumor tissue. As recently published studies have evaluated periprocedural CEUS performed within 24 h after procedure and their results were not satisfactory, it seems that postponing the control test by one day could increase the sensitivity of both methods. PATIENTS AND METHODS: We evaluated 33 patients with 37 lesions, who met the criteria for our study...
May 23, 2018: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/29789520/t1-weighted-dynamic-contrast-enhanced-magnetic-resonance-imaging-dce-mri-to-distinguish-between-concurrent-cholesterol-granuloma-and-invasive-ductal-carcinoma-of-the-breast-a-case-report
#3
Cheng-Chuan Hu, Tsun-Hou Chang, Hsian-He Hsu, Yi-Jen Pen, Jyh-Cherng Yu
BACKGROUND Cholesterol granuloma is a benign condition that can be misdiagnosed as breast cancer on mammographic and ultrasound imaging. A case of concomitant cholesterol granuloma with invasive ductal carcinoma of the left breast was imaged with ultrasound elastography and magnetic resonance imaging (MRI) methods, including T1-weighted dynamic contrast-enhanced MRI (DCE-MRI), before biopsy and histopathology. CASE REPORT A 52-year-old woman, with a previous history of intraduct papillomas in both breasts, underwent six-monthly follow-up breast imaging...
May 23, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29789266/microvascular-volume-in-symptomatic-achilles-tendons-is-associated-with-visa-a-score
#4
S F E Praet, J H Ong, C Purdam, M Welvaert, G Lovell, L Dixon, J E Gaida, J Anglim, S Manzanero, N Vlahovich, D Hughes, G Waddington
OBJECTIVES: The role of neovascularisation in tendinopathy is still poorly understood, potentially due to technical limitations of conventional power Doppler ultrasound. This study aimed to investigate the association between contrast-enhanced ultrasound (CEUS) microvascular volume (MV), Victorian Institute of Sports Assessment-Achilles (VISA-A) scores and intrinsic Achilles tendon tenderness, as well as two different Power Doppler modes. DESIGN: Cross-sectional study...
May 15, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29780288/the-assessment-of-carbon-dioxide-automated-angiography-in-type-ii-endoleaks-detection-comparison-with-contrast-enhanced-ultrasound
#5
Chiara Mascoli, Gianluca Faggioli, Enrico Gallitto, Vincenzo Vento, Giuseppe Indelicato, Rodolfo Pini, Andrea Vacirca, Andrea Stella, Mauro Gargiulo
Introduction: Iodinated contrast media completion angiography (ICM-A) may underestimate the presence of type II endoleak (ELII) after endovascular aortic repair (EVAR), particularly if they are at low flow. Contrast-enhanced ultrasound (CEUS) has been proposed as the gold standard in ELII detection during EVAR follow-up. Intraprocedural carbon dioxide (CO2 ) angiography has been shown to be useful in this setting; however no comparative studies including these three techniques are currently available...
2018: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29778890/dual-photoacoustic-ultrasound-multi-parametric-imaging-from-passion-fruit-like-nano-architectures
#6
Paolo Armanetti, Salvador Pocoví-Martínez, Alessandra Flori, Cinzia Avigo, Domenico Cassano, Luca Menichetti, Valerio Voliani
Ultrasound (US) imaging is a well-established diagnostic technique to image soft tissues in real time, while photoacoustic (PA) is an emerging imaging technique employed to collect molecular information. Integration of PA and US imaging provides complementary information enhancing diagnostic accuracy without employing ionizing radiations. The development of contrast agents able to combine PA and US features is pivotal to improve the significance of PAUS imaging and for PAUS-guided treatment of neoplasms. Here, we demonstrate in relevant ex-vivo models that disassembling passion fruit-like nano-architectures (pfNAs) can be employed in PAUS imaging...
May 17, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29776600/contrast-enhanced-ultrasound-quantifies-the-perfusion-within-tibial-non-unions-and-predicts-the-outcome-of-revision-surgery
#7
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/29773295/the-diagnostic-yield-using-ultrasound-guided-needle-aspiration-for-subpleural-primary-lung-cancer-is-not-affected-by-the-radiological-properties-of-the-lesions-resulting-from-computed-tomography
#8
Naoko Iwakami, Shin-Ichiro Iwakami, Munechika Hara, Mitsuaki Sekiya, Takashi Dambara, Kazuhisa Takahashi
BACKGROUND: It is well known that ultrasound-guided needle-aspiration (USGNA) for intrapulmonary subpleural lesion in contact with the pleura is useful and safe, and its diagnostic yield is high. However, reports concerned with the analyses of cases with intrapulmonary subpleural lesion which could not be diagnosed using USGNA are limited. The objective of this study is to clarify the radiological properties of subpleural primary lung cancer which obstruct diagnosis by USGNA. METHODS: The consecutive cases with subpleural primary lung cancer whose radiological properties could be confirmed by thoracic computed tomography (CT) without contrast enhancement (CE), and examined by USGNA at our hospital between January 1999 and December 2014 have been analyzed...
May 2018: Respiratory Investigation
https://www.readbyqxmd.com/read/29771701/dynamic-contrast-enhanced-ultrasound-identifies-microcirculatory-alterations-in-sepsis-induced-acute-kidney-injury
#9
Alexandre Lima, Tom van Rooij, Bulent Ergin, Michele Sorelli, Yasin Ince, Patricia A C Specht, Egbert G Mik, Leonardo Bocchi, Klazina Kooiman, Nico de Jong, Can Ince
OBJECTIVES: We developed quantitative methods to analyze microbubble kinetics based on renal contrast-enhanced ultrasound imaging combined with measurements of sublingual microcirculation on a fixed area to quantify early microvascular alterations in sepsis-induced acute kidney injury. DESIGN: Prospective controlled animal experiment study. SETTING: Hospital-affiliated animal research institution. SUBJECTS: Fifteen female pigs...
May 15, 2018: Critical Care Medicine
https://www.readbyqxmd.com/read/29768319/contrast-enhanced-stress-echocardiography-and-myocardial-perfusion-imaging-in-patients-hospitalized-with-chest-pain-a-randomized-study
#10
Gerald Salame, Whitney E Juselius, Marisha Burden, Carlin S Long, Tiffany Bendelow, Brenda Beaty, Frederick A Masoudi, Mori J Krantz
Ultrasound contrast-enhanced stress echocardiography improves endocardial visualization, but diagnostic test rates versus stress myocardial perfusion imaging (MPI) have not been studied. A prospective randomized trial was performed between April 2012 and October 2014 at a single-center, safety net hospital. Hospitalized patients referred for noninvasive stress imaging were randomized 1:1 to stress echocardiography or stress MPI. The primary outcome was diagnostic test rate defined as interpretable images and achievement of >85% of age-predicted maximal heart rate (for dobutamine and exercise)...
June 2018: Critical Pathways in Cardiology
https://www.readbyqxmd.com/read/29767316/-ceus-diagnosis-of-solid-renal-tumors
#11
REVIEW
K Stock, H Kübler, T Maurer, J Slotta-Huspenina, K Holzapfel
CLINICAL ISSUE: Renal lesions are detected earlier, often as a result of ultrasound examinations. However, the imaging-based differential diagnosis of different tumour entities remains challenging STANDARD RADIOLOGICAL METHODS: All renal tumours >1 cm should be evaluated for malignancy by computed tomography (CT) or magnetic resonance imaging (MRI). If an angiomyolipoma diagnosis cannot be established with imaging, further diagnostics are appropriate or if malignant progression is suspected, then multidisciplinary discussion for TNM-staging based uro-oncologic therapy is usual...
May 16, 2018: Der Radiologe
https://www.readbyqxmd.com/read/29764411/contrast-enhanced-ultrasonography-of-the-pancreas-shows-impaired-perfusion-in-pancreas-insufficient-cystic-fibrosis-patients
#12
Trond Engjom, Kim Nylund, Friedemann Erchinger, Marcus Stangeland, Birger Norderud Lærum, Martin Mézl, Radovan Jiřík, Odd Helge Gilja, Georg Dimcevski
BACKGROUND: Perfusion assessment of the pancreas is challenging and poorly evaluated. Pancreatic affection is a prevalent feature of cystic fibrosis (CF). Little is known about pancreatic perfusion in CF. We aimed to assess pancreatic perfusion by contrast-enhanced ultrasound (CEUS) analysed in the bolus-and-burst model and software. METHODS: We performed contrast enhanced ultrasound of the pancreas in 25 CF patients and 20 healthy controls. Perfusion data was analysed using a dedicated perfusion model providing the mean capillary transit-time (MTT), blood flow (BF) and blood-volume (BV)...
May 15, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29763966/quantitative-analysis-of-thyroid-tumors-vascularity-a-comparison-between-3-d-contrast-enhanced-ultrasound-and-3-d-power-doppler-on-benign-and-malignant-thyroid-nodules
#13
Cristina Caresio, Marco Caballo, Maurilio Deandrea, Roberto Garberoglio, Alberto Mormile, Ruth Rossetto, Paolo Limone, Filippo Molinari
PURPOSE: To perform a comparative quantitative analysis of Power Doppler ultrasound (PDUS) and Contrast-Enhancement ultrasound (CEUS) for the quantification of thyroid nodules vascularity patterns, with the goal of identifying biomarkers correlated to the malignancy of the nodule with both imaging techniques. METHODS: We propose a novel method to reconstruct the vascular architecture from 3-D PDUS and CEUS images of thyroid nodules, and to automatically extract seven quantitative features related to the morphology and distribution of vascular network...
May 15, 2018: Medical Physics
https://www.readbyqxmd.com/read/29763373/oral-glucose-challenge-impairs-skeletal-muscle-microvascular-blood-flow-in-healthy-people
#14
Ryan D Russell, Donghua Hu, Timothy Greenaway, James E Sharman, Stephen Rattigan, Stephen M Richards, Michelle A Keske
Skeletal muscle microvascular (capillary) blood flow increases in the post-prandial state or during insulin infusion due to dilation of pre-capillary arterioles to augment glucose disposal. This effect occurs independent of changes in large artery function. However, acute hyperglycemia impairs vascular function, causes insulin to vasoconstrict pre-capillary arterioles, and causes muscle insulin resistance in vivo. We hypothesize that acute hyperglycemia impairs post-prandial muscle microvascular perfusion, without disrupting normal large artery hemodynamics, in healthy humans...
May 15, 2018: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29761521/negative-predictive-value-of-contrast-enhanced-ultrasound-in-differentiating-avascular-solid-appearing-from-vascularized-masses-a-retrospective-consecutive-study
#15
Abdulmohsen Alrashed, Hassan Ahmad, Korosh Khalili, Tae Kyoung Kim, Huynh-Jung Jang, Mostafa Atri
OBJECTIVES: To determine the negative predictive value (NPV) of contrast-enhanced ultrasound (CEUS) to establish the lack of vascularity in a mass. METHODS: This work was an Institutional Review Board-approved, Health Insurance Portability and Accountability Act-compliant retrospective study. Acquisition of consent was waived. We included all CEUS examinations performed for tissue characterization between 2004 and 2014 that reported showing no vascularity in a mass...
May 15, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29758936/evaluation-of-integrated-color-coded-perfusion-analysis-for-contrast-enhanced-ultrasound-ceus-after-percutaneous-interventions-for-malignant-liver-lesions-first-results
#16
I Wiesinger, L P Beyer, N Zausig, N Verloh, P Wiggermann, C Stroszczynski, E M Jung
BACKGROUND:  With the rising number of percutaneous ablation therapies in malignant liver lesions there is a need of reliable diagnostics after the intervention to differentiate between reactive changes and tumor. PURPOSE: To assess the success of percutaneous ablation therapies for malignant liver lesions using CEUS with perfusion analysis. MATERIAL AND METHODS: Retrospective analysis of perfusion analysis for 67 patients with 94 malignant liver lesions, treated with ablation therapies...
2018: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29758547/ultrasound-assisted-gene-and-photodynamic-synergistic-therapy-with-multifunctional-foxa1-sirna-loaded-porphyrin-microbubbles-for-enhancing-therapeutic-efficacy-for-breast-cancer
#17
Ranran Zhao, Xiaolong Liang, Bo Zhao, Min Chen, Renfa Liu, Sujuan Sun, Xiuli Yue, Shumin Wang
To improve the non-invasive therapeutic efficacy for ER positive breast cancer (ER+ BC), we fabricated a multifunctional FOXA1 loaded porphyrin microbubble to combine photodynamic therapy (PDT) and gene therapy of FOXA1 knockdown (KD) with ultrasound targeted microbubble destruction (UTMD) technology under the guidance of contrast enhanced ultrasound (CEUS). Cationic porphyrin microbubbles (CpMBs) were firstly fabricated from a porphyrin grafted lipid with two cationic amino groups (PGL-NH2) and fluorocarbon inert gas of C3 F8 ...
May 3, 2018: Biomaterials
https://www.readbyqxmd.com/read/29756164/methods-for-the-determination-of-skeletal-muscle-blood-flow-development-strengths-and-limitations
#18
REVIEW
Lasse Gliemann, Stefan P Mortensen, Ylva Hellsten
Since the first measurements of limb blood flow at rest and during nerve stimulation were conducted in the late 1800s, a number of methods have been developed for the determination of limb and skeletal muscle blood flow in humans. The methods, which have been applied in the study of aspects such as blood flow regulation, oxygen uptake and metabolism, differ in terms of strengths and degree of limitations but most have advantages for specific settings. The purpose of this review is to describe the origin and the basic principles of the methods, important aspects and requirements of the procedures...
May 14, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29753957/brainstem-blood-brain-barrier-disruption-using-focused-ultrasound-a-demonstration-of-feasibility-and-enhanced-doxorubicin-delivery
#19
Saira Alli, Carlyn A Figueiredo, Brian Golbourn, Nesrin Sabha, Megan Yijun Wu, Andrew Bondoc, Amanda Luck, Daniel Coluccia, Colin Maslink, Christian Smith, Heiko Wurdak, Kullervo Hynynen, Meaghan O'Reilly, James T Rutka
Magnetic Resonance Image-guided Focused Ultrasound (MRgFUS) has been used to achieve transient BBB opening without tissue injury. Delivery of a targeted ultrasonic wave causes an interaction between administered microbubbles and the capillary bed resulting in enhanced vessel permeability. The use of MRgFUS in the brainstem has not previously been shown but could provide value in the treatment of tumours such as Diffuse Intrinsic Pontine Glioma (DIPG) where the intact BBB has contributed to the limited success of chemotherapy...
May 10, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29750414/glucose-dependent-insulinotropic-polypeptide-increases-blood-flow-in-adipose-tissue-of-humans-by-recruiting-capillaries
#20
Meena Asmar, Ali Asmar, Lene Simonsen, Jens Juul Holst, Jens Bülow
Context and objektive: Glucose-dependent insulinotropic polypeptide (GIP) in combination with hyperinsulinemia increase blood flow and triglyceride clearance in subcutaneous abdominal adipose tissue in lean humans. The present experiments were performed to determine whether the increase may involve capillary recruitment. Design: Eight lean healthy volunteers were studied before and after 1-h infusion of GIP or saline during a hyperglycemic-hyperinsulinemic clamp, raising plasma glucose and insulin to postprandial levels...
May 9, 2018: Journal of Clinical Endocrinology and Metabolism
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