keyword
MENU ▼
Read by QxMD icon Read
search

Contrast enhanced ultrasound testes

keyword
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/29768319/contrast-enhanced-stress-echocardiography-and-myocardial-perfusion-imaging-in-patients-hospitalized-with-chest-pain-a-randomized-study
#3
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/29753957/brainstem-blood-brain-barrier-disruption-using-focused-ultrasound-a-demonstration-of-feasibility-and-enhanced-doxorubicin-delivery
#4
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/29744641/evaluation-of-renal-lesions-using-contrast-enhanced-ultrasound-ceus-a-10-year-retrospective-european-single-centre-analysis
#5
Johannes Rübenthaler, G Negrão de Figueiredo, K Mueller-Peltzer, D A Clevert
OBJECTIVE: To investigate the usefulness of contrast-enhanced ultrasound (CEUS) in the evaluation of renal masses. METHODS: This study included 255 patients with renal masses. Ages ranged from 18-86 years. CEUS was used for determining malignancy or benignancy and findings were correlated with the histopathological outcome. Out of 255 lesions, 212 lesions were malignant (83.1%) and 43 were benign (16.9%). Diagnostic accuracy was tested using the histopathological diagnosis as the gold standard...
May 9, 2018: European Radiology
https://www.readbyqxmd.com/read/29723846/diagnostic-value-of-nineteen-different-imaging-methods-for-patients-with-breast-cancer-a-network-meta-analysis
#6
Xiao-Hong Zhang, Can Xiao
BACKGROUND/AIMS: We performed a network meta-analysis (NMA) to investigate and compare the diagnostic value of 19 different imaging methods used for breast cancer (BC). METHODS: Cochrane Library, PubMed and EMBASE were searched to collect the relevant literature from the inception of the study until November 2016. A combination of direct and indirect comparisons was performed using an NMA to evaluate the combined odd ratios (OR) and draw the surface under the cumulative ranking curves (SUCRA) of the diagnostic value of different imaging methods for BC...
April 28, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29721100/establishing-sheep-as-an-experimental-species-to-validate-ultrasound-mediated-blood-brain-barrier-opening-for-potential-therapeutic-interventions
#7
Matthew Pelekanos, Gerhard Leinenga, Mostafa Odabaee, Maryam Odabaee, Siamak Saifzadeh, Roland Steck, Jürgen Götz
Rationale: Treating diseases of the brain such as Alzheimer's disease (AD) is challenging as the blood-brain barrier (BBB) effectively restricts access of a large number of potentially useful drugs. A potential solution to this problem is presented by therapeutic ultrasound, a novel treatment modality that can achieve transient BBB opening in species including rodents, facilitated by biologically inert microbubbles that are routinely used in a clinical setting for contrast enhancement. However, in translating rodent studies to the human brain, the presence of a thick cancellous skull that both absorbs and distorts ultrasound presents a challenge...
2018: Theranostics
https://www.readbyqxmd.com/read/29706844/thyroid-cancer-detection-by-ultrasound-molecular-imaging-with-shp2-targeted-perfluorocarbon-nanoparticles
#8
ZhongQian Hu, Bin Yang, Tiankuan Li, Jia Li
Background: Contrast-enhanced ultrasound imaging has been widely used in the ultrasound diagnosis of a variety of tumours with high diagnostic accuracy, especially in patients with hepatic carcinoma, while its application is rarely reported in thyroid cancer. The currently used ultrasound contrast agents, microbubbles, cannot be targeted to molecular markers expressed in tumour cells due to their big size, leading to a big challenge for ultrasound molecular imaging. Phase-changeable perfluorocarbon nanoparticles may resolve the penetrability limitation of microbubbles and serve as a promising probe for ultrasound molecular imaging...
2018: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29650314/a-topo-graph-model-for-indistinct-target-boundary-definition-from-anatomical-images
#9
Hui Cui, Xiuying Wang, Jianlong Zhou, Guanzhong Gong, Stefan Eberl, Yong Yin, Lisheng Wang, Dagan Feng, Michael Fulham
BACKGROUND AND OBJECTIVE: It can be challenging to delineate the target object in anatomical imaging when the object boundaries are difficult to discern due to the low contrast or overlapping intensity distributions from adjacent tissues. METHODS: We propose a topo-graph model to address this issue. The first step is to extract a topographic representation that reflects multiple levels of topographic information in an input image. We then define two types of node connections - nesting branches (NBs) and geodesic edges (GEs)...
June 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29627389/plasma-msept9-a-novel-circulating-cell-free-dna-based-epigenetic-biomarker-to-diagnose-hepatocellular-carcinoma
#10
Abderrahim Oussalah, Susann Rischer, Mouni Bensenane, Guillaume Conroy, Pierre Filhine-Tresarrieu, Renée Debard, Denise Forest-Tramoy, Thomas Josse, Dana Reinicke, Matthieu Garcia, Amandine Luc, Cédric Baumann, Ahmet Ayav, Valérie Laurent, Marcus Hollenbach, Cristina Ripoll, Rosa-Maria Guéant-Rodriguez, Fares Namour, Alexander Zipprich, Michael Fleischhacker, Jean-Pierre Bronowicki, Jean-Louis Guéant
BACKGROUND: Patients with cirrhosis are at high risk of hepatocellular carcinoma (HCC). The SEPT9 gene is a key regulator of cell division and tumor suppressor whose hypermethylation is associated with liver carcinogenesis. The primary aim of this study was to evaluate the diagnostic accuracy of a PCR-based assay for the analysis of SEPT9 promoter methylation in circulating cell-free DNA (mSEPT9) for diagnosing HCC among cirrhotic patients. METHODS: We report two phase II biomarker studies that included cirrhotic patients with or without HCC from France (initial study) and Germany (replication study)...
March 28, 2018: EBioMedicine
https://www.readbyqxmd.com/read/29625446/quantitative-evaluation-of-vascular-microcirculation-using-contrast-enhanced-ultrasound-imaging-in-rabbit-models-of-choroidal-melanoma
#11
Min Gao, Jinhua Tang, Kun Liu, Ming Yang, Haiyun Liu
Purpose: We investigated the application of contrast-enhanced ultrasound (CEUS) to quantify vascular perfusion in two animal models of choroidal melanoma. Methods: B16F10 and choroidal melanoma cell line (OCM1) melanoma xenografts were implanted into the cyclodialysis cleft of rabbits' right eyes. Fundus photography, indocyanine green angiography (ICGA), B-mode ultrasound, and CEUS were used to examine the tumors. Standard vascular parameters of CEUS imaging were evaluated, including the area under the receiver operating characteristic curve (AUC), peak intensity (IMAX), mean transit time (mTT), rise time, and time to peak...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29594851/endocavitary-contrast-enhanced-ultrasound-ceus-a-novel-problem-solving-technique
#12
REVIEW
G T Yusuf, C Fang, D Y Huang, M E Sellars, A Deganello, P S Sidhu
Contrast-enhanced ultrasound (CEUS) is a technique that has developed as an adjunct to conventional ultrasound. CEUS offers a number of benefits over conventional axial imaging with computerised tomography and magnetic resonance imaging, primarily as a "beside" test, without ionising radiation or the safety concerns associated with iodinated/gadolinium-based contrast agents. Intravascular use of ultrasound contrast agents (UCAs) is widespread with extensive evidence for effective use. Despite this, the potential utility of UCAs in physiological and non-physiological cavities has not been fully explored...
March 28, 2018: Insights Into Imaging
https://www.readbyqxmd.com/read/29571625/preoperative-mapping-of-the-aortoiliac-territory-with-duplex-ultrasound-in-patients-with-peripheral-arterial-occlusive-disease
#13
Miguel Muela Méndez, Pilar Caridad Morata Barrado, Estrella Blanco Cañibano, Beatriz García Fresnillo, Mercedes Guerra Requena
OBJECTIVE: Duplex ultrasound (DUS) arterial mapping of the aortoiliac area is limited by obesity, abdominal gas, and the need to use a low-frequency probe (and therefore poorer resolution) in the examination. The aim of this study was to analyze the degree of agreement between DUS mapping of the aortoiliac area and angiography or contrast-enhanced computed tomography angiography (CTA). METHODS: This was a retrospective observational study. Between November 2006 and June 2015, there were 173 patients with a surgical indication for aortoiliac occlusive disease included, with preoperative aortoiliac DUS mapping and subsequent CTA or intraoperative angiography...
March 20, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29556301/association-between-enhancement-patterns-and-parameters-of-contrast-enhanced-ultrasound-and-microvessel-distribution-in-breast-cancer
#14
Xiaokang Li, Yaqing Li, Ying Zhu, Li Fu, Peifang Liu
The aim of the present study was to evaluate the association between enhancement patterns and parameters in contrast-enhanced ultrasonography (CEUS) and microvessel distribution and histological prognostic tumor characteristics of breast cancer. Between September 2011 and April 2013, 109 breast lesions were prospectively analyzed, which were classified into Breast Imaging Reporting and Data System class 4-5 by conventional ultrasound. Before core-needle biopsy, CEUS examination was performed. Different enhancement patterns (homogeneous, peripheral and regional enhancement) were evaluated...
April 2018: Oncology Letters
https://www.readbyqxmd.com/read/29518878/-comparative-analysis-on-the-significances-of-contrast-enhanced-ultrasound-and-dynamic-contrast-enhanced-magnetic-resonance-imaging-in-uveal-melanoma-diagnosis
#15
D J Li, W L Yang, Z Y Wang, W Chen, Q Zhao, Y F Li, R Cui, L Shen, W B Wei
Objective: To compare the significance of contrast-enhanced ultrasound (CEUS) and dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in the diagnosis of uveal melanoma. Methods: It was a retrospective case series study. Sixty-three cases (63 eyes) of uveal melanoma patients (confirmed by histopathology) who underwent CEUS and DCE-MRI examination at Beijing Tongren Hospital during January 2010 and May 2014 were collected, including 30 males and 33 females, with average age of 47 years (ranged from 27 to 69 years)...
March 11, 2018: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29515222/image-guided-focused-ultrasound-cns-molecular-delivery-an-implementation-via-dynamic-contrast-enhanced-magnetic-resonance-imaging
#16
Wen-Yen Chai, Po-Chun Chu, Chih-Hung Tsai, Chung-Yin Lin, Hung-Wei Yang, Hsin-Yi Lai, Hao-Li Liu
Focused ultrasound (FUS) exposure with microbubbles can transiently open the blood-brain barrier (BBB) to deliver therapeutic molecules into CNS tissues. However, delivered molecular distribution/concentration at the target need to be controlled. Dynamic Contrast-Enhanced Magnetic-Resonance Imaging (DCE-MRI) is a well-established protocol for monitoring the pharmacokinetic/pharmacodynamic behavior of FUS-BBB opening. This study investigates the feasibility of using DCE-MRI to estimate molecular CNS penetration under various exposure conditions and molecule sizes...
March 7, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29506145/role-of-acid-sphingomyelinase-and-ceramide-in-mechano-acoustic-enhancement-of-tumor-radiation-responses
#17
Ahmed El Kaffas, Azza Al-Mahrouki, Amr Hashim, Niki Law, Anoja Giles, Gregory J Czarnota
Background: High-dose radiotherapy (>8-10 Gy) causes rapid endothelial cell death via acid sphingomyelinase (ASMase)-induced ceramide production, resulting in biologically significant enhancement of tumor responses. To further augment or solicit similar effects at low radiation doses, we used genetic and chemical approaches to evaluate mechano-acoustic activation of the ASMase-ceramide pathway by ultrasound-stimulated microbubbles (USMB). Methods: Experiments were carried out in wild-type and acid sphingomyelinase (asmase) knockout mice implanted with fibrosarcoma xenografts...
February 28, 2018: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29505405/robust-short-lag-spatial-coherence-imaging
#18
Arun Asokan Nair, Trac Duy Tran, Muyinatu A Lediju Bell
Short-lag spatial coherence (SLSC) imaging displays the spatial coherence between backscattered ultrasound echoes instead of their signal amplitudes and is more robust to noise and clutter artifacts when compared with traditional delay-and-sum (DAS) B-mode imaging. However, SLSC imaging does not consider the content of images formed with different lags, and thus does not exploit the differences in tissue texture at each short-lag value. Our proposed method improves SLSC imaging by weighting the addition of lag values (i...
March 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29490004/repeatability-of-the-flash-replenishment-method-in-contrast-enhanced-ultrasound-for-the-quantitative-assessment-of-hepatic-microvascular-perfusion
#19
Fang Xie, Wen-Bo Wan, Xiang Fei, Ming-Bo Zhang, Yan Zhang, Hong-Wei Wang, Jie Tang, Wen-Bo Tang, Yu-Kun Luo
This study aimed to evaluate the feasibility and repeatability of the flash-replenishment method in contrast-enhanced ultrasound (CEUS) perfusion imaging and assess quantitatively microvascular perfusion in the liver. Twenty healthy New Zealand rabbits were submitted to CEUS perfusion imaging with continuous intravenous infusion. Using flash-replenishment kinetics, the dynamic process of depletion and refilling of microbubble contrast agent was recorded. The hepatic microvascular perfusion parameters were calculated, including region of interest, peak intensity (PI), area under the curve (AUC), and hepatic artery to vein transit time (HA-HVTT)...
2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29486623/diagnostic-accuracy-and-interobserver-agreement-of-contrast-enhanced-ultrasound-in-the-evaluation-of-residual-lesions-after-treatment-for-malignant-lymphoma-and-testicular-cancer-a-retrospective-pilot-study-in-52-patients
#20
Anke Peil-Grun, Corinna Trenker, Konrad Görg, Albrecht Neesse, Jörg Haasenritter, Christian Görg
Value of contrast-enhanced-ultrasound (CEUS) in the evaluation of residual lesions (RL) after therapy in patients with malignant lymphomas (ML) and testicular cancer (TC) with regard to tumor activity. From May 2004-October 2010, in n = 52 patients with ML (n = 34) or TC (n = 18) and RL, B-mode-imaging and CEUS of the RL was performed. In CEUS, differentiation was made between high-enhancement (HE), low-(LE) or no-enhancement (NE) of the RL after therapy. Data were retrospectively evaluated. A positive test result (HE) was found in n = 13 (25%); a negative test result (LE/NE) in n = 39 (75%) patients...
February 27, 2018: Leukemia & Lymphoma
keyword
keyword
50341
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"