Search Results
Results 151 - 200 of 1090
1 2 3 4 5 6 7 8 9 10 >
Klass Oliver - - 2010
The purpose of this study was to evaluate the potential clinical value of coronary plaque imaging with a new generation CT scanner and the interobserver variability of coronary plaque assessment with a new semiautomatic plaque analysis application. Thirty-five isolated plaques of the left anterior descending coronary artery from 35 patients ...
Zheng Xinliang - - 2010
Ultrasound B-mode visualization of lesions produced in soft tissues using high-intensity focused ultrasound (HIFU) has been shown to be challenging when there is no cavitation activity and, therefore, no hyperechogenecity in the focal region. We investigated a method for the visualization and localization of HIFU-induced lesions after HIFU delivery was ...
Ilg Karl - - 2010
OBJECTIVES: To identify and characterize ablation lesions after radiofrequency (RF) catheter ablation of ventricular arrhythmias in patients without prior myocardial infarction and to correlate the ablation lesions with the amount of RF energy delivered and the clinical outcome. BACKGROUND: Visualization of RF energy lesions after ablation of ventricular arrhythmias might ...
Zhang Peng - - 2010
In this study, we demonstrate the feasibility of using a phase-shift nanoemulsion (PSNE) as nuclei for bubble-enhanced heating and lesion formation during high-intensity focused ultrasound (HIFU) thermal ablation. In our experiments, different concentrations of PSNE (5%-15%) uniformly distributed throughout gel phantoms made from acrylamide and albumin were sonicated with a ...
Yu Hojun - - 2010
OBJECTIVE: Pseudoenhancement of an avascular region on contrast-enhanced ultrasound often occurs within an echogenic region of a radiofrequency ablation zone due to nonlinear ultrasound propagation through intervening microbubble-perfused tissue. The purpose of this study was to describe the imaging features of this artifact. MATERIALS AND METHODS: Twenty-six patients with no ...
Choi Youngbin - - 2010
BACKGROUND AND PURPOSE: Microembolic signals (MES) found on transcranial Doppler range from harmless air bubbles to large, solid, particulate emboli from the heart and large vessels. The presence of MES is not always associated with poor clinical outcome. The purpose of our study was to determine whether the relative energy ...
Muramatsu Keiko - - 2010
Placental lakes are sonolucent or hypoechoic areas in images of the placenta, usually considered a physiological dilation of intervillous space with a rather good obstetrical outcome. However, diagnostic criteria for and the clinical significance of placental lakes are yet to be completely established, because of a wide variety of ultrasound ...
Aslam M F - - 2010
In this retrospective study, we compared the accuracy of frozen section and sonographic diagnosis in predicting the final paraffin section diagnosis of ovarian lesions. We hoped thereby to determine if sonographic findings could obviate the need for frozen section in certain circumstances. The frozen section and sonographic diagnosis were compared ...
Bonilla Francisco F - - 2010
OBJECTIVE: The purpose of this series was to determine whether the use of different 3-dimensional (3D) sonographic modes allows better definition of umbilical cord cysts and pseudocysts in utero. METHODS: Two cases of umbilical cord cysts and 1 of a pseudocyst were analyzed and compared with 2-dimensional (2D), 3D, angiopower ...
Thornton A S - - 2010
Background. In vivo comparison of cardiac radiofrequency ablation lesions between standard and magnetically steered 4 mm tip catheters has never been reported.Methods. High and low right atrium (RA) free wall, isthmus, right ventricle (RV) free wall and outflow tract lesions were studied macroscopically and microscopically five days after lesion formation ...
Yekuo Li - - 2010
OBJECTIVE: The aim of this study was to study the value of contrast-enhanced ultrasound (CEUS) in the diagnosis of active hemorrhage and intraparenchymal lesions in blunt hepatic trauma versus conventional ultrasound (US). METHODS: Twenty heparinized and anesthetized domestic pigs have been created to animal models with blunt hepatic trauma by ...
Bartolotta T V - - 2010
PURPOSE: The aim of this study was to assess the role of contrast-enhanced ultrasonography (CEUS) in the characterisation of focal liver lesions in comparison with multidetector computed tomography (MDCT) and magnetic resonance imaging (MRI) with liver-specific contrast agent. MATERIALS AND METHODS: One hundred and eighty-seven focal liver lesions, 91 malignant ...
Fineschi Massimo - - 2010
We sought to investigate the relative clinical significance of target and nontarget lesions repeated percutaneous coronary intervention (re-PCI) in patients implanted with drug-eluting stents (DES). Out of 2626 consecutive DES patients, we retrospectively selected 166 (6.3%; 123 males, aged 65±10 years) who had a clinically-driven re-PCI over a mean follow-up ...
Yang Dal Mo - - 2010
OBJECTIVE: The purpose of this series was to describe the sonographic findings of inguinal endometriosis. METHODS: This was a retrospective analysis of 3 cases of inguinal endometriosis. The following gray scale and color Doppler sonographic features were analyzed: size, shape, echogenicity, and blood flow within inguinal endometriosis. RESULTS: The size ...
Linden Paul - - 2010
A novel coded-excitation method, resolution-enhancement compression (REC), increases the axial resolution and the echo signal-to-noise ratio (eSNR) for an ultrasonic imaging system. The REC technique was examined for its ability to improve lesion detectability. The REC technique was used to double the -3-dB fractional pulse-echo bandwidth of an ultrasonic source ...
Hereter L - - 2010
A case of minimal deviation adenocarcinoma of the cervix in a 34-year-old female is presented. The ultrasonographic and three-dimensional power Doppler color studies revealed a nodular cervical lesion with vascularization more prominent in the center of the nodule but also present at the periphery. The imaging diagnosis was suggestive of ...
Rose Christine - - 2010
BACKGROUND: In order to elucidate criteria for distinguishing benign from malignant lesions, this study correlated the ductoscopy-based macroscopic description of intraductal lesions with histopathologic results. MATERIALS AND METHODS: Aiming to use diagnostic criteria consistent with previous publications, we analyzed the literature and established a uniform set of diagnostic descriptors. Based ...
Cantisani V - - 2010
Objective. To evaluate whether pattern III of color Doppler Ultra-sound may identify malignant nodules. Materials and Methods. We have retrospectively analyzed data pertaining to 1090 patients of both genders (230 males, 860 females), with an average age of 53 years (min 17 years, max 81 years), who underwent thyroidectomy in ...
Thongsima Siremon - - 2010
BACKGROUND: There are a wide variety of fractional resurfacing devices that are available and it is important to understand the tissue effect of different devices at different parameters to ensure a well-controlled treatment. Thus, we have chosen to characterize and compare two different fractional laser devices, the Fraxel SR750 and ...
Yuan Jin-Qing - - 2010
BACKGROUND: Calcified coronary lesions have commonly been considered as a challenge for interventional cardiologists, and few previous studies of sirolimus-eluting stent (SES) for calcified lesion have been limited by small sample size. Therefore, we evaluated the effectiveness of SES implantation for the treatment of calcified lesions in a large Chinese ...
Karimaghaloo Zahra - - 2010
Identification of Gad-enhancing lesions is of great interest in Multiple Sclerosis (MS) disease since they are associated with disease activity. Current techniques for detecting Gad-enhancing lesions use a contrast agent (Gadolinium) which is administered intravenously to highlight Gad-enhancing lesions. However, the contrast agent not only highlights these lesions, but also ...
Lee Chan Wha - - 2010
PURPOSE: To evaluate whether proton MR spectroscopy (MRS) at 3 T with metabolite quantification is helpful for characterizing musculoskeletal lesions and to reveal whether the concentration of choline is correlated with the pathologic degree of malignancy. MATERIAL AND METHODS: Three-tesla MR images and proton MRS data from 27 consecutive patients ...
von Herbay Alexandra - - 2010
PURPOSE: The aim of the study was to investigate the ability of contrast-enhanced sonography (CEUS) with the contrast agent SonoVue to differentiate between benign and malignant focal liver lesions. METHODS: In a prospective study, we examined 317 patients (204 males, 113 females, aged 59 +/- 12 years) with focal liver ...
Hu Bin - - 2010
BACKGROUND AND PURPOSE: Currently, there is no reliable method of monitoring the propagation of radiofrequency lesions in real time. We report our animal experience using contrast-enhanced ultrasonography (CEUS) to evaluate the lesion produced by radiofrequency ablation (RFA) in a canine model and investigate the feasibility to predict these lesions. MATERIALS ...
Wang Yang - - 2010
PURPOSE: To evaluate therapeutic efficacy of ultrasound (US)-guided high-intensity focused ultrasound (HIFU) ablation for treatment of needle-track seeding of hepatocellular carcinoma (HCC). MATERIALS AND METHODS: Nine patients with needle-track seeding of HCC were treated as outpatients using US-guided HIFU ablation. The mean size of the lesion was 1.8 cm (range ...
Wang Yi-Xiang J - - 2010
PURPOSE: To evaluate the temporal lobes in patients previously treated for nasopharyngeal carcinoma to provide a better understanding of delayed radiation-induced injury in the brain unaffected by the underlying tumor. MATERIALS AND METHODS: Retrospective analysis of the patient data was approved by the local ethics committee. Informed consent was waived. ...
Goertz Ruediger S - - 2010
To compare software-based quantification of contrast-enhanced ultrasound (CEUS) examinations of focal liver lesions in the arterial and late phases with the enhancement patterns established by the sonologist. The study cohort comprised 12 malignant and 21 benign hepatic lesions in 33 patients (18 female and 15 male; aged 57 +/- 13 ...
Sahinarslan Asife - - 2009
INTRODUCTION: Fractional flow reserve (FFR) is a method to determine the significance of a lesion. Although an FFR measurement of < 0.75 is accepted to show ischaemia, the effect of the location of the lesion on the coronary artery is not known. This study investigates the effect of lesion location ...
Testa A C - - 2009
OBJECTIVE: To determine whether intravenous contrast ultrasound examination is superior to gray-scale or power Doppler ultrasound for discrimination between benign and malignant adnexal masses with complex ultrasound morphology. METHODS: In an international multicenter study, 134 patients with an ovarian mass with solid components or a multilocular cyst with more than ...
Baltzer Pascal A T - - 2010
OBJECTIVE: This study was performed to assess the sensitivity and specificity for malignant and benign mass lesions of a diagnostic approach combining DWI with T2-weighted images (unenhanced MR mammography, ueMRM) and compare the results with contrast-enhanced MR mammography (ceMRM). MATERIALS AND METHODS: Consecutive patients undergoing histopathological verification of mass lesions ...
Liu Haidong - - 2010
PURPOSE: The role of diffusion-weighted MR imaging (DWI) in the differential diagnosis of pulmonary malignant tumours and solid benign lesions was investigated. METHODS: Sixty-two patients with 66 lesions underwent conventional MRI and DWI (diffusion factor of 0 and 500 s/mm(2)) examinations with 1.5-T MRI. The signal intensity of DWI images ...
Medeiros Lidia Rosi - - 2009
A quantitative systematic review was performed to estimate the accuracy ultrasonography with color Doppler in the diagnosis of ovarian tumors. Studies that compared color Doppler ultrasonography with paraffin-embedded sections parameters for the diagnosis of ovarian tumors were included. Twelve studies were analyzed, which included 2398 women. The pooled sensitivity was ...
Fleischer Arthur C - - 2009
OBJECTIVE: The aim of this study was to evaluate diagnostic parameters to differentiate between benign versus malignant ovarian masses using contrast-enhanced transvaginal sonography (TVS). METHODS: Thirty-three consecutive patients with 36 morphologically abnormal ovarian masses (solid or cystic with papillary excrescences, focally thickened walls, or irregular solid areas) smaller than 10 ...
Al-Edrus Sa - - 2009
Reversible focal lesions in the splenium of the corpus callosum (SCC) or reversible splenial lesion syndrome are rare and little is known about their pathophysiology. The authors describe a case of a 65-year-old female who presented with fever, abnormal behaviour and mild hypernatremia. She was on neuropsychiatric treatment for bipolar ...
Stamenkov Roumen B - - 2010
Using computed tomography, the volume, location, and number of osteolytic lesions were determined adjacent to 38 Harris-Galante 1 (HG-1) acetabular components fixed with screws and 19 porous-coated anatomic (PCA) acetabular components press-fitted without screws. The median implantation times were 16 and 15 years, respectively. The mean total lesion volumes were ...
K?nig Andreas - - 2010
BACKGROUND: Intravascular ultrasound radiofrequency analysis (IVUS-RF) characterizes plaque components as necrotic core (NC) and dense calcium (DC). The aim of this study was to perform an IVUS-RF derived analysis of the lesion segment profile in acute coronary syndrome (ACS) patients. Therefore, we compared the site of the minimum lumen area--cross ...
Crema M D - - 2010
The aim of the study was (1) to evaluate contrast enhancement patterns of subchondral cysts on magnetic resonance imaging and (2) to discuss possible radiological explanations of cyst enhancement based on existing theories of subchondral cyst formation in osteoarthritis. The Multicenter Osteoarthritis Study (MOST) is a NIH-funded longitudinal observational study ...
Wood Mark A - - 2010
OBJECTIVE: Creation of transmural myocardial lesions with epicardial surgical devices to treat atrial fibrillation is difficult. A new cooled bipolar radiofrequency ablation probe was used to create transmural myocardial lesions under controlled conditions. METHODS: The Coolrail (AtriCure, Inc, West Chester, Ohio) is a handheld probe with 2 parallel 30-mm long ...
Lostumbo Antonella - - 2010
RATIONALE AND OBJECTIVES: Flat lesions in the colon may result in false-negative computed tomography colonography interpretations. It is unknown whether flat lesions are better measured on two-dimensional (2D) or three-dimensional (3D) images and which settings are optimal for enhanced reproducibility and decreased variability. We evaluated these factors to determine whether ...
Wang Lilian C - - 2009
OBJECTIVE: Computer-aided evaluation (CAE) programs for breast MRI provide automated lesion kinetic information. The CAE kinetic parameters that best predict malignancy have not been established. We compared three CAE kinetic features of suspicious breast MRI lesions to determine associations with benign or malignant outcomes. MATERIALS AND METHODS: From 1,532 MRI ...
Wang Z - - 2010
The aim of this study was to evaluate the imaging features of hepatic angiomyolipoma (AML) on contrast-enhanced ultrasound (CEUS). The imaging features of 12 pathologically proven hepatic AML lesions in 10 patients who had undergone baseline ultrasound (BUS) and CEUS examinations were evaluated retrospectively. The enhancement extent, pattern and dynamic ...
Vilana Ramón - - 2009
OBJECTIVE: The purpose of this study was to evaluate the prognostic value of 10-MHz sonography in measuring melanoma thickness before biopsy or excision. SUBJECTS AND METHODS: Fifty-four patients with lesions suggestive of melanoma participated in the study. Lesions were measured on sonography using a 10-MHz linear transducer before routine biopsy ...
Stang Axel - - 2009
OBJECTIVE: The purpose of our study was to evaluate whether sonographic characterization of focal splenic lesions could be improved by using low mechanical index pulse-inversion sonography after sulfur hexafluoride-filled microbubble injection. MATERIALS AND METHODS: One hundred forty-seven splenic lesions (68 benign, 79 malignant) in 147 patients (81 men, 66 women; ...
Schlemmer Marcus - - 2011
The aim of this pilot study was the evaluation of CT perfusion patterns in metastatic GIST lesions under specific molecular therapy with sunitinib or imatinib both in responders and non-responders. 24 patients with metastatic GIST under tyrosine kinase inhibition were retrospectively evaluated. A total of 46 perfusion and venous phase ...
Xie Xiao-Hua - - 2010
The value of contrast-enhanced ultrasound (CEUS) in differential diagnosis between benign and malignant gallbladder diseases was investigated. Thirty-three patients with gallbladder carcinomas and 47 with benign gallbladder diseases underwent CEUS. The lesion enhancement time, enhancement extent, pattern, dynamic change of enhancement and the intactness of gallbladder wall were evaluated. In ...
Rathore Sudhir - - 2009
AIMS: Drug eluting stents (DES) have been used routinely in a wide variety of clinical situations. The impact of DES on reducing restenosis has not been uniform across complex subsets and limited data is available examining predictors of restenosis in unselected population. METHODS AND RESULTS: We investigated predictors of angiographic ...
Hashimoto Kenichi - - 2009
BACKGROUND: The efficacy of transcatheter cryoablation for ventricular tachycardia (VT) remains controversial because of the limited size of the lesion produced. An increased lesion size if the cryoablation catheter profile and catheter tip length were increased was hypothesized. METHODS AND RESULTS: Closed-chest transcatheter cryoablation was applied with 7F, 6-mm tip ...
Patiala Bhardwaj - - 2009
Color Doppler USG of the scrotum has been demonstrated to be useful in the diagnosis of scrotal lesions. Gray-scale USG characterizes the lesions as testicular or extratesticular and, with color Doppler and power Doppler, flow and perfusion can also be assessed. Color Doppler is particularly helpful in acute painful conditions, ...
Wood Mark A - - 2009
BACKGROUND: Irrigated radiofrequency (RF) ablation catheters may produce different lesion sizes dependent upon the electrode orientation to the tissue. This study examined the effect of irrigated electrode orientation on the lesion size and explores a potential mechanism for this effect. METHODS AND RESULTS: Lesions were created in isolated porcine myocardium ...
Zhao Hongjia - - 2010
OBJECTIVE: To evaluate the significance of contrast-enhanced ultrasound (CEUS) examination in differential diagnosis of malignant and benign breast lesions. METHODS: Seventy-one patients with seventy-six breast tumors are selected randomly. CEUS examinations were performed before and after bolus injection of the contrast agent SonoVue (Bracco, Milan, Italy). Specific sonographic quantification software, ...
1 2 3 4 5 6 7 8 9 10 >