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https://www.readbyqxmd.com/read/28914777/the-usefulness-of-contrast-enhanced-ultrasound-in-the-assessment-of-early-kidney-transplant-function-and-complications
#1
REVIEW
Sara Álvarez Rodríguez, Vital Hevia Palacios, Enrique Sanz Mayayo, Victoria Gómez Dos Santos, Víctor Díez Nicolás, María Dolores Sánchez Gallego, Javier Lorca Álvaro, Francisco Javier Burgos Revilla
OBJECTIVES: The routine diagnostic method for assessment of renal graft dysfunction is Doppler ultrasound. However, contrast-enhanced ultrasound (CEUS) may provide more information about parenchymal flow and vascular status of kidney allografts. The aim of the study was to assess the effectiveness of CEUS in the immediate post-transplant period, focusing on acute vascular complications. A brief review of available literature and a report of our initial experience is made. MATERIAL AND METHODS: 15 kidney transplant (KT) cases with clinical suspicion of acute surgical complication were assessed with CEUS and conventional Doppler ultrasound (US)...
September 15, 2017: Diagnostics
https://www.readbyqxmd.com/read/28911220/contrast-enhanced-ultrasound-ceus-liver-imaging-reporting-and-data-system-li-rads-2017-a-review-of-important-differences-compared-to-the-ct-mri-system
#2
Tae Kyoung Kim, Seung Yeon Noh, Stephanie R Wilson, Yuko Kono, Fabio Piscaglia, Hyun-Jung Jang, Andrej Lyshchik, Christoph F Dietrich, Juergen K Willmann, Alexander Vezeridis, Claude B Sirlin
Medical imaging plays an important role in the diagnosis and management of hepatocellular carcinoma (HCC). The Liver Imaging Reporting and Data System (LI-RADS) was initially created to standardize the reporting and data collection of CT and MR imaging for patients at risk for HCC. As contrast-enhanced ultrasound (CEUS) has been widely used in clinical practice, it has recently been added to the LI-RADS. While CEUS LI-RADS shares fundamental concepts with CT/MRI LI-RADS, there are key differences between the modalities reflecting dissimilarities in the underlying methods of image acquisition and types of contrast material...
September 15, 2017: Clinical and Molecular Hepatology
https://www.readbyqxmd.com/read/28900725/contrast-enhanced-ultrasonography-evaluation-of-hepatocellular-carcinoma-with-peritumoral-fat-spared-area-a-case-report
#3
Atsuyuki Ikeda, Yoko Oiwa, Hiroyuki Kokuryu
Peritumoral fat-spared area (PTFSA), a focal spared area surrounding hepatic tumors, is a specific finding of liver tumors in fatty livers. PTFSA mimics a liver tumor, making it difficult to recognize the tumor boundary. We report a case of a 56-year-old man with fatty liver who was diagnosed with a liver tumor. Ultrasonography (US) revealed a nearly homogeneous hyperechoic liver tumor measuring 40 mm in the left lobe. A thick hypoechoic area was observed around the tumor that spread more widely than an ordinary halo...
September 12, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28887222/contrast-enhanced-ultrasound-imaging-can-predict-vascular-targeted-photodynamic-therapy-induced-tumor-necrosis-in-small-animals
#4
F H Cornelis, K Kim, J C Durack, S Jebiwott, A Scherz, G Srimathveeravalli, J A Coleman
AIMS: To evaluate the accuracy of contrast-enhanced ultrasound (CEUS) for monitoring tumor necrosis following WST-11 vascular targeted photodynamic therapy (VTP) using imaging-pathology correlation. METHODS: Renal adenocarcinoma cells were injected into the hindlimb of 13 BalB/c mice resulting in tumors ranging from 9.8 to 194.3mm(3). US guidance was used to place a laser fiber into the tumor, and VTP was performed. CEUS was performed prior to animal sacrifice, 24hours post-VTP...
September 5, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28885212/comparison-of-computed-tomography-ct-and-contrast-enhanced-ultrasound-ceus-for-the-quantitative-evaluation-of-an-ablation-defect-following-radiofrequency-ablation-of%C3%A2-malignant-liver-lesions
#5
K Brünn, L Beyer, M Haimerl, B Pregler, C Stroszczynski, E M Jung, P Wiggermann
OBJECTIVE: To compare contrast-enhanced computed tomography (CT) and contrast-enhanced ultrasound (CEUS) for the quantitative evaluation of an ablation defect following radiofrequency ablation of malignant liver lesions in a prospective study. MATERIALS AND METHODS: 22 radiofrequency ablations of malignant liver tumors were performed. The ablation defects were then measured and evaluated by two independent examiners via contrast-enhanced computed tomography (CT) and contrast-enhanced ultrasound (CEUS) using a 1-5 MHz multifrequency convex ultrasound transducer (LOGIQ E9, GE) with respect to the short-axis diameter, the long-axis diameter, and the area...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28885211/postoperative-control-of-functional-muscle-flaps-for-facial-palsy-reconstruction-ultrasound-guided-tissue-monitoring-using-contrast-enhanced-ultrasound-ceus-and-ultrasound-elastography
#6
A Kehrer, V Mandlik, C Taeger, S Geis, L Prantl, E M Jung
BACKGROUND AND OBJECTIVES: Facial paralysis causes excruciating impairments including facial asymmetry, limited eye closure, oral incontinence and social dysfunction. Modern plastic surgical reconstructions render favorable results with well-perfused dynamic muscle flaps. Post-operative tissue monitoring is a critical determinant for success. Contrast-enhanced Ultrasound (CEUS) and elastography have proven superior properties to evaluate tissue perfusion in various organs. We evaluated their role for functional muscle flaps positioned at the sub-skin level in facial palsy patients...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28885209/investigation-of-the-acute-plantar-fasciitis-with-contrast-enhanced-ultrasound-and-shear-wave-elastography-first-results
#7
Franz Josef Putz, Matthias G Hautmann, Miriam Banas, Ernst Michael Jung
BACKGROUND: The plantar fasciitis is a common disease with a high prevalence in public and a frequent cause of heel pain. OBJECTIVE: In our pilot study, we wanted to characterise the feasibility of shear-wave elastography and contrast-enhanced ultrasound (CEUS) in the assessment of the plantar fasciitis. METHODS: 23 cases of painful heels were examined by B-Mode ultrasound, Power Doppler (PD), shear wave elastography and contrast-enhanced ultrasound before anti-inflammatory radiation...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28885208/the-diagnostic-value-of-contrast-enhanced-ultrasound-ceus-as-a-new-technique-for-imaging-of-vascular-complications-in-renal-transplants-compared-to-standard-imaging-modalities
#8
K Mueller-Peltzer, J Rübenthaler, M Fischereder, M Reiser, D-A Clevert
BACKGROUND: Vascular complications in renal transplant patients are a well-known issue in post transplant patient care. If malfunctioning of the renal transplant is suspected to be caused by vascular complications an early diagnosis and therapy is required to maintain the renal transplant. Computed tomography (CT), digital substraction angiography (DSA) and radioisotope renography are the gold standard imaging modalities to diagnose vascular complications. OBJECTIVE: To analyse the sensitivity and specificity of contrast-enhanced ultrasound (CEUS) in comparison to the standard imaging modalities CT, DSA and radioisotope renography in the diagnosis of vascular complications in renal transplant patients...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28885205/reduced-microperfusion-due-to-portal-vein-thrombosis-impact-on-the-outcome-of-percutaneous-thermal-tumor-ablation
#9
B Pregler, L P Beyer, I Wiesinger, M Haimerl, C Stroszczynski, E M Jung, P Wiggermann
PURPOSE: To determine the influence of pre-interventionally existing portal vein thrombosis on the ablation success of percutaneous tumor ablation of HCC. MATERIALS AND METHODS: 15 patients with HCC and pre-existing portal vein thrombosis underwent thermal tumor ablation. We retrospectively analyzed the pre- and post-interventionally performed CT and MRI scans in terms of technical success as well as the complication rate. The portal vein thrombosis was classified into segmental, lobar and central thrombus...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28885204/quantitative-evaluation-of-real-time-maximum-liver-capacity-limax-and-time-intensity-curve-tic-analysis-in-ceus-based-microperfusion
#10
M Haimerl, K Brünn, S Poelsterl, L P Beyer, I Wiesinger, C Stroszczynski, E-M Jung, P Wiggermann
PURPOSE: To compare the diagnostic performance of real-time maximum liver capacity (LiMAx) with dynamic contrast-enhanced ultrasound (CEUS)-based liver microcirculation. MATERIALS AND METHODS: 23 patients underwent liver function capacity (LiMAx) test and consecutive or previous CEUS examinations. A bolus injection of 1.4 ml sulfur hexafluoride microbubbles was administered for CEUS measurements (1-6 MHz) and quantitative perfusion analysis (TIC) was performed with an integrated perfusion software using stored cine-loops...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28875373/differentiating-brain-radionecrosis-from-tumour-recurrence-a-role-for-contrast-enhanced-ultrasound
#11
Luca Mattei, Francesco Prada, Marcello Marchetti, Paola Gaviani, Francesco DiMeco
Differentiating radionecrosis from tumour recurrence is a major issue in neuro-oncology. Conventional imaging is far from being validated as an alternative to histological assessment. We report the case of a patient operated on for suspected recurrence of brain metastasis 9 months after cyberknife radiosurgery. While magnetic resonance imaging showed strong enhancement of the lesion, intraoperative contrast-enhanced ultrasonography (CEUS) surprisingly did not-different from what is expected for brain metastases...
September 5, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28872408/healing-response-of-a-structural-hamstring-injury-perfusion-imaging-8-weeks-follow-up
#12
Marion Kellermann, Christoph Lutter, Thilo Hotfiel
CONTEXT: Hamstring injuries are frequently observed in various sports disciplines both in elite and recreational sport. OBJECTIVE: To quantify intramuscular tissue perfusion via contrast-enhanced ultrasound in the acute phase and during the healing of a structural muscle injury confirmed by a high-resolution MRI. DESIGN: Case study. SETTING: Laboratory environment. PATIENT: 32-year-old wakeboarder (height 176 cm, body weight 76 kg, BMI 24...
September 5, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28869455/influence-of-ultrasound-microbubbles-on-kidney-oxygen-tension
#13
P Lamby, L Prantl, A Krüger-Genge, R P Franke, E M Jung, F Jung
Ultrasound contrast agents (USCA) allows the dynamic detection of blood flow of both the macro and microvasculature. An obvious prerequisite for USCAs is the unhindered passage of clinically relevant dose levels through the microcirculation especially of the lungue, where they have to pass capillaries with diameters of around 4 μm. While smaller microbubbles rapidly passed through the microcirculation along with the red blood cells, larger microbubbles, however, were observed to coalesce and interrupt the blood flow...
August 28, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28866490/hadamard-encoded-multi-pulses-for-contrast-enhanced-ultrasound-imaging
#14
Ping Gong, Pengfei Song, Shigao Chen
The development of contrast-enhanced ultrasound (CEUS) imaging offers great opportunities for new ultrasound clinical applications such as myocardial perfusion imaging and abdominal lesion characterization. In CEUS imaging, the contrast agents (i.e., microbubbles) are utilized to improve the contrast between blood and tissue based on their high nonlinearity under low ultrasound pressure. In this paper, we propose a new CEUS pulse sequence by combining Hadamard-encoded multi-pulses (HEM) with fundamental frequency bandpass filter (i...
August 30, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28858788/development-of-a-fluid-dynamic-model-for-quantitative-contrast-enhanced-ultrasound-imaging
#15
Baudouin Denis de Senneville, Anthony Novell, Chloe Arthuis, Vanda Mendes, Paul-Armand Dujardin, Frederic Patat, Ayache Bouakaz, Jean-Michel Escoffre, Franck Perrotin
Contrast-enhanced ultrasound (CEUS) is a noninvasive imaging technique extensively used for blood perfusion imaging of various organs. This modality is based on the acoustic detection of gas-filled microbubble contrast agents used as intravascular flow tracers. Recent efforts aim at quantifying parameters related to the enhancement in the vascular compartment using time-intensity curve (TIC), and at using these latter as indicators for several pathological conditions. However, this quantification is mainly hampered by two reasons: first, the quantification intrinsically solely relies on temporal intensity variation, the explicit spatial transport of the contrast agent being left out...
August 29, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28856401/applications-of-contrast-enhanced-ultrasound-in-the-kidney
#16
REVIEW
Brittany Kazmierski, Corinne Deurdulian, Hisham Tchelepi, Edward G Grant
Incidental discovery of renal lesions on cross-sectional imaging studies performed for other indications is not uncommon. With the increased reliance on medical imaging, the number of incidentally detected renal lesions has also grown over time. While simple cysts account for the majority of these lesions, the presence of complex features within a cystic lesion, such as septations and solid components, can present a confusing picture. Solid lesions, too, can be indeterminate, and distinguishing between benign solid masses (like lipid-poor angiomyolipomas and oncocytomas) and renal cell carcinoma affects patient management and can prevent unnecessary interventions...
August 30, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28852319/combination-of-acoustic-radiation-force-impulse-imaging-serological-indexes-and-contrast-enhanced-ultrasound-for-diagnosis-of-liver-lesions
#17
Xiao-Lan Sun, Hui Yao, Qiong Men, Ke-Zhu Hou, Zhen Chen, Chang-Qing Xu, Li-Wei Liang
AIM: To assess the value of combined acoustic radiation force impulse (ARFI) imaging, serological indexes and contrast-enhanced ultrasound (CEUS) in distinguishing between benign and malignant liver lesions. METHODS: Patients with liver lesions treated at our hospital were included in this study. The lesions were divided into either a malignant tumor group or a benign tumor group according to pathological or radiological findings. ARFI quantitative detection, serological testing and CEUS quantitative detection were performed and compared...
August 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28845489/is-contrast-enhanced-ultrasonography-a-useful-tool-in-a-beginner-s-hand-how-much-can-a-computer-assisted-diagnosis-prototype-help-in-characterizing-the-malignancy-of-focal-liver-lesions
#18
Tudor Voicu Moga, Alina Popescu, Ioan Sporea, Mirela Danila, Ciprian David, Vasile Gui, Nicoleta Iacob, Gratian Miclaus, Roxana Sirli
AIM: Contrast enhanced ultrasound (CEUS) improved the characterization of focal liver lesions (FLLs), but is an operatordependent method. The goal of this paper was to test a computer assisted diagnosis (CAD) prototype and to see its benefit in assisting a beginner in the evaluation of FLLs. MATERIAL AND METHOD: Our cohort included 97 good quality CEUS videos[34% hepatocellular carcinomas (HCC), 12.3% hypervascular metastases (HiperM), 11.3% hypovascular metastases (HipoM), 24...
August 23, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28845479/incidental-diagnosis-of-a-carcinoid-tumor-of-the-ileum-using-contrast-enhanced-ultrasound-ceus
#19
Johannes Rübenthaler, Karolin Paprottka, Bernhard Renz, Markus Rentsch, Thomas Knösel, Maximilian Reiser, Dirk-André Clevert
No abstract text is available yet for this article.
June 2017: Ultrasound International Open
https://www.readbyqxmd.com/read/28836516/autoimmune-pancreatitis-imaging-features
#20
Yi Dong, Mirko D'Onofrio, Michael Hocke, Christian Jenssen, Andrej Potthoff, Nathan Atkinson, Andre Ignee, Christoph F Dietrich
BACKGROUND AND OBJECTIVES: Autoimmune pancreatitis (AIP) remains a difficult disease to diagnose before treatment, particularly if presenting as a focal mass lesion. The purpose of this multicenter retrospective study is to analyze imaging features of histologically confirmed AIP to determine the additional diagnostic value of contrast-enhanced ultrasound (CEUS), contrast-enhanced endoscopic ultrasound (CE-EUS), and elastography to B-mode features. PATIENTS AND METHODS: We report on a retrospective data collection of 60 histologically confirmed cases of AIP in comparison to 16 patients with pancreatic adenocarcinomas (PDAC)...
August 24, 2017: Endoscopic Ultrasound
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