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Contrast enhanced ultrasound testes

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https://www.readbyqxmd.com/read/28067009/one-step-3d-tv-hysterosalpingo-foam-sonography-3d-tv-hyfosy-confirmation-test-for-essure%C3%A2-follow-up-a-multicenter-study
#1
Brunella Zizolfi, Lucia Lazzeri, Mario Franchini, Attilio Di Spiezio Sardo, Carmine Nappi, Emilio Piccione, Caterina Exacoustos
OBJECTIVE: To evaluate the feasibility and accuracy of a three-dimensional-transvaginal-hysterosalpingo-contrast-sonography using the new dedicated contrast-enhanced gel foam (3D-TV-HyFoSy) to assess the position of the tubal sterilization Essure® devices and consequent tubal occlusion in patients who underwent Essure® hysteroscopic tubal sterilization. METHODS: This multicenter study was prospectively conducted from June 2012 to July 2014 in four italian centers and included 50 women who underwent hysteroscopic Essure® microinsert placement, for a total of 95 tubes...
January 9, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28063077/automatic-gallbladder-and-gallstone-regions-segmentation-in-ultrasound-image
#2
Jing Lian, Yide Ma, Yurun Ma, Bin Shi, Jizhao Liu, Zhen Yang, Yanan Guo
PURPOSE: As gallbladder diseases including gallstone and cholecystitis are mainly diagnosed by using ultra-sonographic examinations, we propose a novel method to segment the gallbladder and gallstones in ultrasound images. METHODS: The method is divided into five steps. Firstly, a modified Otsu algorithm is combined with the anisotropic diffusion to reduce speckle noise and enhance image contrast. The Otsu algorithm separates distinctly the weak edge regions from the central region of the gallbladder...
January 6, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28052301/c-arm-cone-beam-computed-tomography-guidance-for-radiofrequency-ablation-in-hepatocellular-carcinoma
#3
Keizo Kato, Hiroshi Abe, Makiko Ika, Takeshi Yonezawa, Yoshiyuki Sato, Noriko Hanawa, Shohei Shimizu, Shinji Endo, Ryota Matsuo, Akihito Tsubota
OBJECTIVE: To assess the usefulness of C-arm cone beam computed tomography (CBCT) combined with ultrasound for the treatment of hepatocellular carcinoma (HCC) by radiofrequency ablation (RFA). METHODS: Patients underwent RFA following transcatheter arterial chemoembolization (TACE) or RFA alone under ultrasound or CBCT guidance combined with ultrasound-based techniques. They were divided into 2 groups based on the use (C group) and nonuse (NC group) of CBCT guidance...
January 5, 2017: Oncology
https://www.readbyqxmd.com/read/28009476/testing-the-efficacy-of-contrast-enhanced-ultrasound-in-detecting-transplant-rejection-using-a-murine-model-of-heart-transplantation
#4
Krisztina Fischer, Shunsuke Ohori, F Can Meral, Mayuko Uehara, Silvia Giannini, Takaharu Ichimura, R Neal Smith, Ferenc A Jolesz, Indira Guleria, Yongzhi Zhang, Philip Jason White, Nathan J McDannold, Karin Hoffmeister, Michael M Givertz, Reza Abdi
One of the key unmet needs to improve long-term outcomes of heart transplantation is to develop accurate, non-invasive and practical diagnostic tools to detect transplant rejection. Early intra-graft inflammation and endothelial cell injuries occur prior to advanced transplant rejection. We developed a novel diagnostic imaging platform to detect early declines in micro-vascular perfusion (MP) of cardiac transplants using Contrast Enhanced Ultrasonography (CEUS). The efficacy of CEUS in detecting transplant rejection was tested in a murine model of heart transplants, a standard preclinical model of solid organ transplant...
December 23, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27995384/quantitative-imaging-by-pixel-based-contrast-enhanced-ultrasound-reveals-a-linear-relationship-between-synovial-vascular-perfusion-and-the-recruitment-of-pathogenic-il-17a-f-il-23-cd161-cd4-t-helper-cells-in-psoriatic-arthritis-joints
#5
Ugo Fiocco, Roberto Stramare, Veronica Martini, Alessandro Coran, Francesco Caso, Luisa Costa, Mara Felicetti, Gaia Rizzo, Matteo Tonietto, Anna Scanu, Francesca Oliviero, Bernd Raffeiner, Maristella Vezzù, Francesca Lunardi, Raffaele Scarpa, David Sacerdoti, Leopoldo Rubaltelli, Leonardo Punzi, Andrea Doria, Enrico Grisan
To develop quantitative imaging biomarkers of synovial tissue perfusion by pixel-based contrast-enhanced ultrasound (CEUS), we studied the relationship between CEUS synovial vascular perfusion and the frequencies of pathogenic T helper (Th)-17 cells in psoriatic arthritis (PsA) joints. Eight consecutive patients with PsA were enrolled in this study. Gray scale CEUS evaluation was performed on the same joint immediately after joint aspiration, by automatic assessment perfusion data, using a new quantification approach of pixel-based analysis and the gamma-variate model...
December 20, 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/27992383/quantification-of-tumor-perfusion-using-dce-us-impact-of-mathematical-modeling
#6
Maxime Doury, Alexandre Dizeux, Alain de Cesare, Olivier Lucidarme, Claire Pellot-Barakat, Lori Bridal, Frédérique Frouin
Dynamic Contrast Enhanced Ultrasound has been proposed to monitor tumor therapy, in complement to volume measurements. To assess the variability of perfusion parameters in ideal conditions, four consecutive test-retest studies were acquired in a tumor model of mouse, using controlled injections. The impact of mathematical modeling on parameter variability was then investigated. Coefficients of variation (CV) of tissue blood volume (BV) and tissue blood flow (BF) based-parameters were estimated inside 32 sub-regions of the tumors, comparing the log-normal (LN) model with a one-compartment model fed by an arterial input function (AIF) and improved by the introduction of a time delay parameter...
December 19, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27981485/-1-h-mr-spectroscopy-of-suspicious-breast-mass-lesions-at-3t-a-clinical-experience
#7
Stefania Montemezzi, Carlo Cavedon, Lucia Camera, Gabriele Meliadò, Francesca Caumo, Ilaria Baglio, Francesco Sardanelli
OBJECTIVES: To test 3T proton magnetic resonance spectroscopy ((1)H-MRS) for breast mass lesions. METHODS: Patients with BI-RADS 4-5 lesions at mammography/ultrasound were prospectively enrolled. After contrast-enhanced breast MRI, single-voxel MRS (point-resolved volume selection, PRESS); pencil-beam shimming; volume of interest 1 cm(3); TR/TE = 3000/135 ms) was performed. Spectra were considered reliable if the full width at half maximum (FWHM) of the water peak was ≤45 Hz...
December 15, 2016: La Radiologia Medica
https://www.readbyqxmd.com/read/27973542/increased-vascularization-in-the-vulnerable-upstream-regions-of-both-early-and-advanced-human-carotid-atherosclerosis
#8
Ola Hjelmgren, Karl Gellerman, Josefin Kjelldahl, Per Lindahl, Göran M L Bergström
BACKGROUND: Vascularization of atherosclerotic plaques has been linked to plaque vulnerability. The aim of this study was to test if the vascularization was increased in upstream regions of early atherosclerotic carotid plaques and also to test if the same pattern of vascularization was seen in complicated, symptomatic plaques. METHODS: We enrolled 45 subjects with early atherosclerotic lesions for contrast enhanced ultrasound and evaluated the percentage of plaque area in a longitudinal ultrasound section which contained contrast agent...
2016: PloS One
https://www.readbyqxmd.com/read/27935550/vascular-complications-in-liver-transplantation-beneficial-role-of%C3%A2-contrast-enhanced-ultrasound-ceus-%C3%A2-in%C3%A2-the%C3%A2-postoperative-phase
#9
J Rübenthaler, K J Paprottka, E Hameister, K Hoffmann, N Joiko, M Reiser, D A Clevert
PURPOSE: To compare the sensitivity and specificity of contrast-enhanced ultrasound (CEUS) and computed tomography (CT) in the diagnosis of vascular complications after liver transplantation in the postoperative phase. MATERIALS AND METHODS: A total of 60 patients with elevated liver function tests after liver transplantation with initial imaging studies between July 2005 and November 2015 were retrospectively analysed. CEUS and CT were compared in their diagnosis of vascular complications and CT was considered as the gold standard...
December 8, 2016: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/27913326/delay-and-standard-deviation-beamforming-to-enhance-specular-reflections-in-ultrasound-imaging
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
Sven Heiko Loosen, Maximilian Schmeding, Christoph Roderburg, Marcel Binnebösel, Ilknur Temizel, Felix M Mottaghy, Jens J W Tischendorf, Frank Tacke, Nadine T Gaisa, Kais Hussein, Ulrich Lehmann, Christian Trautwein, Ulf Peter Neumann, Tom 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...
January 2017: 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
#19
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
#20
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
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