Search Results
Results 201 - 250 of 1097
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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, ...
Chiou Hong-Jen - - 2009
BACKGROUND: This study was performed to evaluate the usefulness of high-resolution grayscale and color Doppler ultrasound to distinguish benign from malignant soft-tissue masses on the basis of ultrasonographic patterns. METHODS: We enrolled 398 female and 420 male patients aged 1-104 years (mean, 49.8 years). All presented with a palpable nodule ...
Wortsman Ximena - - 2009
The purpose of this presentation is to show the sonographic morphologic characteristics of plantar warts and the scope of sonography in the treatment of these lesions. We retrospectively reviewed 27 sonographic examinations of the plantar region; 17 corresponded to plantar warts diagnosed by dermatologists in which the diagnoses were medically ...
Shafqat Gulnaz - - 2009
Chorioangioma, the non trophoblastic tumour, constitutes the commonest benign growth of the placenta. Though benign, 30% rate of maternal or foetal complications are associated with large masses. Sonography including colour Doppler imaging provides the best modality not only for its diagnosis but also the foetal status. A case of large ...
Wijffels Maurits C E F - - 2009
INTRODUCTION: The aim of this study is to characterize ablation lesions using varying ratios of bipolar:unipolar energy and to show the feasibility of a circular decapolar pulmonary vein ablation catheter (PVAC) to create transmural lesions in an in vivo porcine superior vena cava (SVC) model. METHODS AND RESULTS: Ablations were ...
Morawietz Lars - - 2009
AIMS: The histopathological diagnosis of infection in periprosthetic tissue from loose total joint endoprosthesis has been the subject of controversy. The aim was to define a histological criterion that would best differentiate between aseptic and septic endoprosthesis loosening. METHODS AND RESULTS: Neutrophilic granulocytes (NG) were enumerated histopathologically in 147 periprosthetic ...
Xu Hui-Xiong - - 2010
To compare the enhancement pattern of hilar cholangiocarcinoma on contrast-enhanced ultrasound (CEUS) with that on contrast-enhanced computed tomography (CECT). Thirty-two consecutive patients with pathologically proven hilar cholangiocarcinomas were evaluated by both low mechanical index CEUS and CECT. The enhancement feature of the tumor, portal vein infiltration, and lesion conspicuity on ...
Song Ze-Zhou - - 2010
We assessed the role of contrast-enhanced ultrasound (CEUS) in the differential diagnosis between benign and malignant portal vein thrombosis (PVT) in patients who had liver tumors. Seventeen consecutive patients who had cirrhosis, liver tumors, and PVT were prospectively studied with CEUS. CEUS was performed at low mechanical index after intravenous ...
Sorrentino Paolo P Liver Unit, Clinical and Experimental Hepatology, Department of Internal Medicine, S.G. Moscati Hospital, Via Pennini, 83100 Avellino, Italy. - - 2009
To clarify which method has accuracy: 2nd generation contrast-enhanced ultrasound or biopsy of portal vein thrombus in the differential diagnosis of portal vein thrombosis. One hundred and eighty-six patients with hepatocellular carcinoma and portal vein thrombosis underwent in blinded fashion a 2nd generation contrast-enhanced ultrasound and biopsy of portal vein ...
Bråtane Bernt Tore - - 2009
Though diffusion weighted imaging (DWI) is frequently used for identifying the ischemic lesion in focal cerebral ischemia, the understanding of spatiotemporal evolution patterns observed with different analysis methods remains imprecise. DWI and calculated apparent diffusion coefficient (ADC) maps were serially obtained in rat stroke models (MCAO): permanent, 90 min, and ...
McLaren Christine E - - 2009
Dynamic contrast-enhanced magnetic resonance imaging is a clinical imaging modality for the detection and diagnosis of breast lesions. Analytic methods were compared for diagnostic feature selection and the performance of lesion classification to differentiate between malignant and benign lesions in patients. The study included 43 malignant and 28 benign histologically ...
Yang Dal Mo - - 2009
We report the sonographic findings in a case of lymphoma, which mimicked chronic inflammation. Scrotal gray-scale sonography revealed an irregularly margined, hypoechoic mass in the right testis and epididymis. Color Doppler sonography showed increased blood flow within the hypoechoic lesions in both testis and epididymis. Pathologic examination revealed a diffuse ...
Phongkitkarun Sith - - 2009
OBJECTIVE: To determine the supplemental MRI value in characterization of small hepatic lesions (< or = 20 mm) indetermined by routine CT scan. MATERIAL AND METHOD: This was a retrospective study. Sixty-four patients with 81 indeterminate small hepatic lesions on the CT scan were included in this study. Two radiologists ...
Watanabe Ichiro - - 2009
Ablation catheters with multiple electrodes are effective for the creation of linear atrial lesions but are associated with an increased risk of coagulum formation. In an animal study, we used a novel 9Fr deflectable ablation catheter with two saline/foam electrode pocket covered with 20 mm tubing. Each pocket contained six ...
Francica Giampiero - - 2009
PURPOSE: To describe the sonographic (US) appearances of endometriomas developed in the vicinity of a scar from Cesarean section and compare sonographic and clinical characteristics of large (> or =3 cm) scar endometriomas (LSEs) with small scar endometriomas (SSEs). METHOD: Twenty-eight consecutive women (mean age, 31 years; range, 20-42) with ...
Park Byung Kwan - - 2010
To evaluate which factor is involved in limiting ultrasound (US)-guided radiofrequency (RF) ablation of small renal masses. Twenty-five patients with 31 renal masses underwent image-guided RF ablation. If a lesion was visible on US, US-guided RF ablation was performed. If a lesion was invisible on US or if the lesion ...
Morel O - - 2009
OBJECTIVE: To evaluate radiofrequency (RF) efficiency and safety for the ablation of retained placenta in humans, using a pregnant sheep model. DESIGN: Experimental study. SETTING: Laboratory of Surgery School, Nancy, France. POPULATION/SAMPLE: Three pregnant ewes/ten human placentas. METHODS: Various RF procedures were tested in pregnant ewes on 50 placentomes (individual ...
Fisichella V A - - 2009
BACKGROUND: "Perspective-filet view" is a novel three-dimensional (3D) viewing technique for computed tomography colonography (CTC). Studies with experienced readers have shown a sensitivity for perspective-filet view similar to that of 2D or 3D endoluminal fly-through in detection of colorectal lesions. It is not known whether perspective-filet view, compared to axial ...
Nguyen Anh T - - 2009
OBJECTIVE: The purpose of this series was to evaluate the value of contrast-enhanced ultrasonography (CEUS) in the characterization of focal liver lesions (FLLs) in patients with glycogen storage diseases (GSDs). METHODS: Contrast-enhanced ultrasonographic data obtained for characterization of 8 FLLs (size, 0.9-10.2 cm) in 2 patients with GSD type Ia ...
Koo Bon-Kwon - - 2009
Functional evaluation of bifurcation lesions is more difficult than usual lesions due to their complex anatomy. Angiographic and intravascular ultrasound criteria for main branch intervention cannot be directly applied to side branch lesions due to the difference in underlying lesion characteristics, geometric changes during intervention, and the size of myocardial ...
Demartini Wendy B - - 2009
OBJECTIVE: Data remain sparse to guide the use of targeted sonography for suspicious breast lesions found with MRI. The purpose of our study was to determine the usefulness of sonography in this setting. MATERIALS AND METHODS: Retrospective review of our breast MRI database was performed to identify all nonpalpable, mammographically ...
von Herbay Alexandra - - 2009
OBJECTIVE: We investigated the ability of contrast-enhanced ultrasonography with SonoVue (Bracco SpA, Milan, Italy), a sulfur hexafluoride microbubble contrast agent, to reveal differences between benign and malignant focal splenic lesions. METHODS: In a prospective study we investigated 35 lesions in 35 patients (24 male and 11 female; mean age +/- ...
Sohn Yu-Mee - - 2009
OBJECTIVE: The purpose of this study was to evaluate the diagnostic performance of conventional sonography combined with sonographic elastography for differentiation between benign and malignant breast lesions and to assess the diagnostic performance with two types of interpretation criteria for sonographic elastography. METHODS: For this study, we included 281 lesions ...
Riaz Ahsun - - 2009
We present the correlation between radiologic and pathologic findings in HCC patients who underwent radioembolization with yttrium-90 ((90)Y) microspheres prior to resection or transplantation. Thirty-five patients with a total of 38 lesions who underwent liver explantation after (90)Y radioembolization were studied. Imaging surrogates following treatment were evaluated; the explants were ...
Bhatia Mona - - 2010
Aortocaval fistula (ACF) is a rare, life threatening complication of abdominal aortic aneurysms. Time to diagnosis is crucial as preoperative diagnosis and early surgical intervention significantly improve the outcome. The clinical spectrum being varied, the challenge of prompt and reliable diagnosis rests on emergency radiology. While the gold standard for ...
Chen Hung-Jen - - 2009
BACKGROUND: The aim of this study was to reevaluate the clinical significance of sonographic appearances, in particular the application of color Doppler ultrasound imaging, in discriminating peripheral air-fluid lung abscess from empyema. METHODS: We retrospectively studied patients who had had peripheral air-fluid lesions due to empyema or lung abscess and ...
Kanemoto Hideyuki - - 2009
Contrast-enhanced ultrasound using Sonazoid, a novel contrast medium with a liver-specific Kupffer phase, was evaluated in canine focal liver lesions Twenty-five dogs with a liver mass were given intravenous Sonazoid, and the enhancement pattern in the arterial, portal, and parenchymal phase was characterized. An enhancement defect in the lesion in ...
Bartolotta Tommaso Vincenzo - - 2009
Contrast-enhanced ultrasound (CEUS) represents a significant breakthrough in sonography and it is being increasingly used for the evaluation of focal liver lesions (FLLs). The unique feature of CEUS of non-invasively assessing in real-time liver perfusion throughout the vascular phase has led to a dramatic improvement in diagnostic accuracy of US ...
Yandow Suzanne M - - 2009
BACKGROUND: A randomized prospective trial of marrow-versus-steroids treatment of solitary bone cyst was ongoing. Protocol required contrast injection of the cyst. A subpopulation was noted to have large, rapid venous outflow of contrast material (omnipaque). Central embolization and resultant acute respiratory distress syndrome has been reported with bone marrow transplant. ...
Linhart Markus - - 2009
AIMS: We compared a newly developed irrigated gold tip electrode ablation catheter and a gold tip 4 and 8 mm catheter with the corresponding platinum-iridium (Pt) tip catheters in an in vitro setting. METHODS AND RESULTS: In a flow chamber simulating physiological flow conditions, radiofrequency catheter ablation was performed on ...
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 ...
Bhardwaj N - - 2009
AIMS: Complete tumour cell death is necessary for any ablative technique to be successful. Microwave tissue ablation (MTA), radiofrequency (RF) and cryotherapy (CT) are three methods of destroying liver tumours in situ. Unlike MTA, RF and CT rely on conduction of the thermal insult for their cytotoxicity, potentially affecting lesion ...
Malagò Roberto - - 2009
OBJECTIVE: Diagnosis of malignancy and prognostic assessment continue to be problems in the management of nonfunctioning pancreatic endocrine tumors. Histologic examination is the reference standard. The aim of our study was to compare B-mode and contrast-enhanced sonographic findings regarding nonfunctioning pancreatic endocrine tumors. Signs of malignancy, such as Ki67 index ...
Jiang Nan-Chuan - - 2009
BACKGROUND AND OBJECTIVE: Differential diagnosis of malignant solitary pulmonary nodules (SPNs) from benign ones is difficult based on imaging manifestations. This study was to assess dynamic enhancement patterns of SPNs detected with multi-detector row computed tomography (MDCT), correlate SPN manifestations of MDCT to the expression of vascular endothelial growth factor ...
Liu Guang-Jian - - 2009
The objective was to evaluate whether the echogenicity of focal liver lesions (FLLs) on baseline gray-scale ultrasound (US) interferes with the diagnostic performance of contrast-enhanced US (CEUS) for small FLLs. Three-hundred and eighty-eight patients were examined by real-time CEUS using a sulfur hexafluoride-filled microbubble contrast agent. The images of 114 ...
Richstone Lee - - 2009
PURPOSE: We describe the use of a novel bipolar radiofrequency (RF) system for the destruction of prostate tissue in an ex vivo model. MATERIALS AND METHODS: A bipolar RF delivery system (Trod Medical, France) was linked to a 500 kHz generator. Eight lesions were created in an ex vivo bull ...
Tongsong Theera - - 2009
OBJECTIVE: To determine the validity of pulsatility and resistance index of transabdominal Doppler ultrasound (e-flow) in distinguishing between benign and malignant adnexal masses. METHODS: A cross-sectional descriptive study was conducted on patients scheduled for elective surgery due to adnexal masses at Maharaj Nakorn Chiang Mai Hospital, Thailand, between April 2006 ...
Choi Yoon Jung - - 2009
The purpose of this study was to identify clinical and ultrasound (US) features of malignancy in patients using cytological results of follicular neoplasm (FN) in the thyroid. We followed 165 patients with cytology diagnosed FN and evaluated the final surgical histopathology outcomes in 114 patients between March 2006 and November ...
Marras Carlo - - 2009
BACKGROUND: There have recently been increasing case reports in the literature of deep brain stimulation (DBS) electrodes used for lesioning with satisfactory clinical success in the treatment of Parkinson disease and tremor. METHODS: After preliminary experiments of radiofrequency (RF) lesioning with a quadripolar DBS lead, a paediatric case of generalized ...
Varoglu Asuman Orhan - - 2009
PURPOSE: Our aim was to evaluate the relationship between lesion volume, serum level of biochemical markers, and clinical situation in ischemic and hemorrhagic stroke. METHODS: MRI was obtained on 33 ischemic and 28 hemorrhagic strokes. The Cavalieri method was used to measure the volume. To evaluate neurological situation of the ...
Phuttharak Warinthorn - - 2009
OBJECTIVE: To compare diagnostic performance of gray-scale ultrasound and combined gray-scale ultrasound with color Doppler ultrasound in predicting malignancy of thyroid nodules by using tissue diagnosis as the reference standard. DESIGN: Diagnostic test with prospective data collection. MATERIALS AND METHODS: Between November 2007 and October 2008, 31 patients (16 with ...
Sumer A P - - 2009
OBJECTIVES: To evaluate the efficacy of ultrasonography and colour and power Doppler ultrasonography for diagnosis of intraosseous lesions of the jaws and to correlate the contents of the lesion with the histological findings. METHODS: This study included 20 patients referred to the oral surgery clinic for treatment. All patients had ...
Shiozawa Kazue - - 2009
To clarify the validity of the evaluation of the hemodynamics of hepatic lesions < or =20 mm in diameter using contrast-enhanced ultrasonography (CE-US) with Sonazoid. Sixty-two hepatic lesions in 55 patients with chronic hepatitis or cirrhosis due to hepatitis C virus were studied. We evaluated by quantitative analysis the time ...
Zuber-Jerger I - - 2009
The use of contrast enhancers has widened the possibilities of sonographic imaging, and allows the differentiation of characteristic enhancement patterns leading to diagnosis in focal liver lesions. The aim of our study was to evaluate contrast ultrasound signs in diagnosing malignant liver lesions. 86 patients with 100 solid liver lesions ...
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