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Contrast enhanced ultrasound testes

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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/27890423/hepatic-epithelioid-angiomyolipoma-clinical-features-and-imaging-findings-of-contrast-enhanced-ultrasound-and-ct
#2
Y Tan, X Xie, Y Lin, T Huang, G Huang
AIM: To evaluate the clinical features and imaging findings of epithelioid angiomyolipoma (EAML) on contrast-enhanced ultrasound (CEUS) and contrast-enhanced computed tomography (CECT). MATERIALS AND METHODS: During January 2006 to November 2015, six patients with histopathologically proven hepatic EAML were evaluated using both CECT and ultrasonography. Six patients underwent CEUS and four patients had CECT images. Patients' demographics, clinical presentations, laboratory test results, and imaging appearances were collected and analysed...
November 24, 2016: Clinical Radiology
https://www.readbyqxmd.com/read/27882136/accuracy-of-contrast-enhanced-ultrasound-compared-with-conventional-ultrasound-in-acute-pancreatitis-diagnosis-and-complication-monitoring
#3
Diming Cai, Shyam Sundar Parajuly, Huiyao Wang, Xiaoling Wang, Wenwu Ling, Bin Song, Yongzhong Li, Yan Luo
Contrast-enhanced ultrasound (CEUS) has been used for diagnosing acute pancreatitis (AP), particularly severe acute pancreatitis (SAP). However, the diagnostic difference between CEUS and conventional ultrasonography (CUS) for AP and SAP has not been reported. The aim of the present study was to investigate the diagnostic accuracy of CUS and CEUS for AP. A total of 196 patients clinically diagnosed with AP were selected. All patients underwent CUS, CEUS and contrast-enhanced computed tomography (CECT) within 72 h...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27875218/entropy-of-ultrasound-contrast-agent-velocity-fields-for-angiogenesis-imaging-in-prostate-cancer
#4
Ruud van Sloun, Libertario Demi, Arnoud Postema, Jean de la Rosette, Hessel Wijkstra, Massimo Mischi
Prostate cancer care can benefit from accurate and cost-efficient imaging modalities that are able to reveal prognostic indicators for cancer. Angiogenesis is known to play a central role in the growth of tumors towards a metastatic or a lethal phenotype.With the aim of localizing angiogenic activity in a noninvasive manner, Dynamic Contrast Enhanced Ultrasound (DCEUS) has been widely used. Usually, the passage of ultrasound contrast agents thought the organ of interest is analyzed for the assessment of tissue perfusion...
November 16, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/27787749/renal-complex-cystic-masses-usefulness-of-contrast-enhanced-ultrasound-ceus-in-their-assessment-and-its-agreement-with-computed-tomography
#5
REVIEW
Enrique Sanz, Vital Hevia, Victoria Gómez, Sara Álvarez, Jose-Javier Fabuel, Laura Martínez, Rafael Rodriguez-Patrón, Cristina González-Gordaliza, Francisco-Javier Burgos
INTRODUCTION: Around 10 % of renal cell carcinomas (RCC) are cystic, while some benign cysts have complex appearance in conventional diagnostic tests such as computed tomography (CT) or magnetic resonance imaging (MRI). These renal complex cystic masses (RCCMs) are a challenging entity in urological practice and sometimes have a difficult management, requiring surgical removal. Contrast-enhanced ultrasound (CEUS) is a very sensitive test detecting microvascularization in real time, and it has been used in the diagnostic workup of these kinds of lesions...
December 2016: Current Urology Reports
https://www.readbyqxmd.com/read/27767985/comparison-of-magnetic-resonance-imaging-mri-and-contrast-enhanced-ultrasound-ceus-in-the-evaluation-of-unclear-solid-renal-lesions
#6
J Rübenthaler, K Paprottka, J Marcon, E Hameister, K Hoffmann, N Joiko, M Reiser, D A Clevert
PURPOSE: To compare the sensitivity and specificity of contrast-enhanced ultrasound (CEUS) and magnetic resonance imaging (MRI) in the evaluation of unclear renal lesions to the histopathological outcome. MATERIALS AND METHODS: A total of 36 patients with a single unclear solid renal lesion with initial imaging studies between 2005 and 2015 were included. CEUS and MRI were used for determining malignancy or benignancy and initial findings were correlated with the histopathological outcome...
October 21, 2016: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/27746000/supplementing-essential-amino-acids-with-the-nitric-oxide-precursor-l-arginine-enhances-skeletal-muscle-perfusion-without-impacting-anabolism-in-older-men
#7
W Kyle Mitchell, Bethan E Phillips, Daniel J Wilkinson, John P Williams, Debbie Rankin, Jonathan N Lund, Kenneth Smith, Philip J Atherton
Postprandial limb blood flow and skeletal muscle microvascular perfusion reduce with aging. Here we tested the impact of providing bolus essential amino acids (EAA) in the presence and absence of the nitric oxide precursor, l-Arginine (ARG), upon skeletal muscle blood flow and anabolism in older men. Healthy young (YOUNG: 19.7 ± 0.5 y, N = 8) and older men (OLD, 70 ± 0.8 y, N = 8) received 15 g EAA or (older only) 15 g EAA +3 g ARG (OLD-ARG, 69.2 ± 1.2 y, N = 8). We quantified responses in muscle protein synthesis (MPS; incorporation of (13)C phenylalanine into myofibrillar proteins), leg and muscle microvascular blood flow (Doppler/contrast enhanced ultrasound (CEUS)) and insulin/EAA in response to EEA ± ARG...
October 6, 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/27727478/injections-of-intravenous-contrast-for-computerized-tomography-scans-precipitate-migraines-in-hereditary-hemorrhagic-telangiectasia-subjects-at-risk-of-paradoxical-emboli-implications-for-right-to-left-shunt-risks
#8
Trishan Patel, Amy Elphick, James E Jackson, Claire L Shovlin
OBJECTIVE: To evaluate if injection of intravenous particles may provoke migraines in subjects with right-to-left shunts due to pulmonary arteriovenous malformations (AVMs). BACKGROUND: Migraine headaches commonly affect people with hereditary hemorrhagic telangiectasia (HHT), especially those with pulmonary AVMs that provide right-to-left shunts. In our clinical practice, patients occasionally reported acute precipitation of migraine headaches following injection of technetium-labeled albumin macroaggregates for nuclear medicine scans...
November 2016: Headache
https://www.readbyqxmd.com/read/27706546/a-liver-nodule-in-a-patient-transplanted-for-primary-sclerosing-cholangitis-an-interdisciplinary-diagnostic-approach
#9
S H Loosen, M Schmeding, C Roderburg, M Binnebösel, I Temizel, F M Mottaghy, J J W Tischendorf, F Tacke, N T Gaisa, K Hussein, U Lehmann, C Trautwein, U P Neumann, T Luedde
We report the case of a 53-year-old female patient who was transplanted with the liver of a 71-year-old male donor for advanced primary sclerosing cholangitis (PSC) and who additionally was diagnosed with a histologically non-classifiable colitis shortly before transplantation. Upon follow-up abdominal ultrasound 4 months after transplantation, a liver lesion measuring 16 × 23 mm was detected in the transplanted liver. This lesion had not been noticed immediately after transplantation and showed a pattern suspicious for malignancy in contrast-enhanced ultrasound...
October 5, 2016: Zeitschrift Für Gastroenterologie
https://www.readbyqxmd.com/read/27659687/a-pilot-clinical-study-in-characterization-of-malignant-renal-cell-carcinoma-subtype-with-contrast-enhanced-ultrasound
#10
Sandeep K Kasoji, Emily H Chang, Lee B Mullin, Wui K Chong, W Kimryn Rathmell, Paul A Dayton
Malignant renal cell carcinoma (RCC) is a diverse set of diseases, which are independently difficult to characterize using conventional MRI and CT protocols due to low temporal resolution to study perfusion characteristics. Because different disease subtypes have different prognoses and involve varying treatment regimens, the ability to determine RCC subtype non-invasively is a clinical need. Contrast-enhanced ultrasound (CEUS) has been assessed as a tool to characterize kidney lesions based on qualitative and quantitative assessment of perfusion patterns, and we hypothesize that this technique might help differentiate disease subtypes...
September 22, 2016: Ultrasonic Imaging
https://www.readbyqxmd.com/read/27592557/fractal-dimension-of-tumor-microvasculature-by-dce-us-preliminary-study-in-mice
#11
Tamerlan Saidov, Carola Heneweer, Maarten Kuenen, Julian von Broich-Oppert, Hessel Wijkstra, Jean de la Rosette, Massimo Mischi
Neoangiogenesis, which results in the formation of an irregular network of microvessels, plays a fundamental role in the growth of several types of cancer. Characterization of microvascular architecture has therefore gained increasing attention for cancer diagnosis, treatment monitoring and evaluation of new drugs. However, this characterization requires immunohistologic analysis of the resected tumors. Currently, dynamic contrast-enhanced ultrasound imaging (DCE-US) provides new options for minimally invasive investigation of the microvasculature by analysis of ultrasound contrast agent (UCA) transport kinetics...
December 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/27587213/-significance-of-three-dimensional-reconstruction-as-a-method-of-preoperative-planning-of-laparoscopic-radiofrequency-ablation
#12
W W Zhang, H G Wang, X J Shi, M Y Chen, S C Lu
OBJECTIVE: To discuss the significance of three-dimensional reconstruction as a method of preoperative planning of laparoscopic radiofrequency ablation(LRFA). METHODS: Thirty-two cases of LRFA admitted from January 2014 to December 2015 in Department of Hepatobiliary Surgery, Chinese People's Liberation Army General Hospital were analyzed(3D-LRFA group). Three-dimensional(3D) reconstruction were taken as a method of preoperative planning in 3D-LRFA group.Other 64 LRFA cases were paired over the same period without three-dimensional reconstruction before the operation (LRFA group)...
September 1, 2016: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/27583883/contrast-enhanced-ultrasound-improves-accurate-identification-of-appendiceal-mucinous-adenocarcinoma-in-an-old-patient-a-case-report
#13
Jing Shang, Li-Tao Ruan, Ying Dang, Yun-Yue Wang, Yan Song, Jie Lian
BACKGROUND: Adenocarcinoma of appendiceal origin is far rarer than other colorectal carcinomas and its preoperative diagnosis is challenging. To our knowledge, utility of contrast-enhanced ultrasound (CEUS) to diagnose it is much less. METHOD: A 61-year-old man presented with abdominal pain in the right lower quadrant for 20 days. In order to fulfill an accurately preoperative diagnosis, he received laboratory and imaging tests such as carcinoembryonic antigen (CEA), computer tomography (CT), CEUS and endoscope...
August 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27577113/contrast-enhanced-ultrasound-features-of-histologically-proven-small-%C3%A2-20%C3%A2-mm-liver-metastases
#14
Yi Dong, Xiao-Long Zhang, Feng Mao, Bei-Jian Huang, Qin Si, Wen-Ping Wang
OBJECTIVE: We analyzed contrast-enhanced ultrasound (CEUS) features of histologically proved small (≤20 mm) liver metastases, in comparison to small (≤20 mm) hepatocellular carcinomas (HCC), to define the differentiate diagnoses value of CEUS in clinical practice. MATERIAL AND METHODS: Eighty-two cases of small (≤20 mm) liver metastases and 84 cases of small (≤20 mm) HCC were retrospectively reviewed. All patients had CEUS images. Two radiologists assessed CEUS enhancement pattern and time of enhancement in consensus...
August 31, 2016: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/27567615/magnetic-resonance-guided-focused-ultrasound-for-the-treatment-of-painful-bone-metastases-role-of-apparent-diffusion-coefficient-adc-and-dynamic-contrast-enhanced-dce-mri-in-the-assessment-of-clinical-outcome
#15
Michele Anzidei, Alessandro Napoli, Beatrice Sacconi, Fabrizio Boni, Vincenzo Noce, Michele Di Martino, Luca Saba, Carlo Catalano
PURPOSE: To assess the correlation between functional MRI, including ADC values obtained from DWI and DCE, and clinical outcome in patients with bone metastases treated with MRgFUS. METHODS AND MATERIALS: Twenty-three patients with symptomatic bone metastases underwent MRgFUS treatment (ExAblate 2100 system InSightec) for pain palliation. All patients underwent clinical and imaging follow-up examinations at 1, 3 and 6 months after treatment. Visual Analog Scale (VAS) score was used to evaluate treatment efficacy in terms of pain palliation while ADC maps obtained by DWI sequences, and DCE data were used for quantitative assessment of treatment response at imaging...
August 27, 2016: La Radiologia Medica
https://www.readbyqxmd.com/read/27561916/endothelium-dependent-vasodilatory-signalling-modulates-%C3%AE-1-adrenergic-vasoconstriction-in-contracting-skeletal-muscle-of-humans
#16
Christopher M Hearon, Brett S Kirby, Gary J Luckasen, Dennis G Larson, Frank A Dinenno
KEY POINTS: 'Functional sympatholysis' describes the ability of contracting skeletal muscle to attenuate sympathetic vasoconstriction, and is critical to ensure proper blood flow and oxygen delivery to metabolically active skeletal muscle. The signalling mechanism responsible for sympatholysis in healthy humans is unknown. Evidence from animal models has identified endothelium-derived hyperpolarization (EDH) as a potential mechanism capable of attenuating sympathetic vasoconstriction...
August 26, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27542700/a-systematic-review-of-ultrasound-or-magnetic-resonance-imaging-compared-with-computed-tomography-for-endoleak-detection-and-aneurysm-diameter-measurement-after-endovascular-aneurysm-repair
#17
Qiang Guo, Jichun Zhao, Bin Huang, Ding Yuan, Yi Yang, Guojun Zeng, Fei Xiong, Xiaojiong Du
PURPOSE: To analyze the literature comparing ultrasound [duplex (DUS) or contrast-enhanced (CEUS)] or magnetic resonance imaging (MRI) with computed tomography angiography (CTA) for endoleak detection and aneurysm diameter measurement after endovascular aneurysm repair (EVAR). METHODS: A systematic review identified 31 studies that included 3853 EVAR patients who had paired scans (DUS or CEUS vs CTA or MRI vs CTA) within a 1-month interval for identification of endoleaks during EVAR surveillance...
August 19, 2016: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/27541629/fast-vascular-ultrasound-imaging-with-enhanced-spatial-resolution-and-background-rejection
#18
Avinoam Bar-Zion, Charles Tremblay-Darveau, Oren Solomon, Dan Adam, Yonina Eldar
Ultrasound super-localization microscopy techniques presented in the last few years enable non-invasive imaging of vascular structures at the capillary level by tracking the flow of ultrasound contrast agents (gas microbubbles). However, these techniques are currently limited by low temporal resolution and long acquisition times. Super-resolution optical fluctuation imaging (SOFI) is a fluorescence microscopy technique enabling sub-diffraction limit imaging with high temporal resolution by calculating high order statistics of the fluctuating optical signal...
August 15, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/27512847/microflow-imaging-of-contrast-enhanced-ultrasound-for-evaluation-of-neovascularization-in-peripheral-lung-cancer
#19
Song Wang, Wei Yang, Jing-Jing Fu, Yu Sun, Hui Zhang, Jing Bai, Min-Hua Chen, Kun Yan
The aim of this study was to investigate the role of microflow imaging (MFI) of contrast-enhanced ultrasound (CEUS) for evaluating microvascular architecture of different types of peripheral lung cancer (PLC) and to explore the correlated pathological basis.Ninety-five patients with PLC were enrolled in this study. Two radiologists independently evaluated the microvascular architecture of PLC with MFI. The interobserver agreement was measured with Kappa test. The diagnosis value of MFI was calculated. With pathological analysis, the correlation between MFI and microvascular density (MVD)/microvascular diameter (MD) was evaluated...
August 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27504997/3-tesla-diffusion-tensor-imaging-in-autosomal-dominant-polycystic-kidney-disease-the-nephrologist-s-point-of-view
#20
Rosaria Lupica, Enricomaria Mormina, Antonio Lacquaniti, Domenico Trimboli, Biagio Bianchimano, Silvia Marino, Placido Bramanti, Marcello Longo, Michele Buemi, Francesca Granata
BACKGROUND/AIMS: CT, MRI and ultrasound are currently used for screening and follow-up of individuals affected by autosomal dominant polycystic kidney disease (ADPKD). Dynamic contrast-enhanced MRI studies renal perfusion after gadolinium administration, with possible side effects, such as nephrogenic systemic fibrosis. The aim of our study was to evaluate the clinical application of 3 Tesla (3T)-diffusion tensor image (DTI) in ADPKD patients, correlating its parameters, such as fractional anisotropy (FA), and apparent diffusion coefficient (ADC) with kidney function tests...
2016: Nephron
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