Search Results
Results 451 - 500 of 1097
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Numata Kazushi - - 2005
BACKGROUND: We examined contrast-enhanced harmonic gray-scale sonographic findings of pancreatic carcinoma in relation to the pathological findings in resected specimens to evaluate correlations between observations made by this modality and the pathological findings. METHODS: The pathological findings of surgical specimens obtained from 16 patients were examined in relation to the ...
del Cura Jose L - - 2005
OBJECTIVE: The objectives of our study were to investigate differences in Doppler sonography features between benign and malignant breast lesions and between malignant lesions with different prognostic factors and to propose diagnostic criteria for Doppler sonography of breast lesions. SUBJECTS AND METHODS: We performed power and duplex Doppler sonography examinations ...
Jain Deepak - - 2005
OBJECTIVE: We sought to develop a prognostic lesion classification based on simple angiographic parameters, lesion length and reference diameter that predicts differential outcome in patients undergoing intracoronary radiation. METHODS AND RESULTS: Three types of lesions were identified: Type A characterized by lesion length less than or equal to 30 mm, ...
Marret H - - 2005
OBJECTIVE: To assess the performance of a power Doppler vascularity index in the preoperative diagnosis of ovarian malignancy. METHODS: Adnexal masses (n = 101) were examined prospectively with power Doppler ultrasonography before surgical treatment. The tumor vascularity index (power Doppler index, PDI) was determined by quantification of the number of ...
Alcázar Juan Luis - - 2005
OBJECTIVE: The purpose of this study was to explore the role of a new concept ("vascular sampling") as a third step to discriminate benign and malignant lesions in B-mode and color Doppler sonographically suggestive adnexal masses. METHODS: Forty-five women (mean age, 52.3 years; range, 17-82 years) with the diagnosis of ...
Ruiz Carazo E - - 2005
BACKGROUND: We conducted a retrospective analysis of the clinical presentation and the computed tomographic (CT) and ultrasound (US) findings in six episodes of hepatosplenic brucelloma in five patients. METHODS: In four episodes, the diagnosis was based on clinical history, serology, and characteristic imaging findings. In the other two episodes in ...
D'Onofrio Mirko - - 2005
PURPOSE: To evaluate the late sinusoidal phase of contrast enhancement with a 2nd-generation ultrasound contrast enhanced medium in the characterization of hypoechoic focal liver lesions. METHODS: We studied 88 hypoechoic liver lesions (diameter range, 1-18 cm; with 18 lesions 2 cm or less) found on conventional grayscale sonography (US) with ...
Antonsson Johan - - 2005
Radiofrequency (RF) lesioning in the human brain is one possible surgical therapy for severe pain as well as movement disorders. One obstacle for a safer lesioning procedure is the lack of size monitoring. The aim of this study was to investigate if changes in laser Doppler or intensity signals could ...
Luo Bao-Ming - - 2005
AIM: To investigate the value of contrast-enhanced C3-MODE technology in differentiating malignant nodules of liver from the benign ones. METHODS: Forty-six nodules in 36 patients (29 men and 7 women) were studied by contrast-enhanced C3-MODE technology and contrast-enhanced CT in 1 wk before the biopsy or operation. A low MI ...
Baidya Sajan Gopal - - 2005
Angiographically visible complex lesions, associated with disrupted plaques and intraluminal thrombus, are more common in unstable angina (UA). The aim of our study was to evaluate the relationship between the complex lesions and the T helper cells related Interleukins (IL). We analyzed the concentrations of IL-10, IL-12, IL-18 using ELISA ...
Bugge Einar E Department of Cardiology, Westmead Hospital, Westmead, NSW 2145, - - 2005
Linear atrial radiofrequency lesions have been used effectively for the treatment of atrial fibrillation. In most cases an endocardial approach has been suggested. A method for epicardial placement of lesions would reduce the complexity of these procedures. We compared lesions created in ovine hearts in vivo using irrigated bipolar or ...
Miyakawa Megumi - - 2005
The aim of this study was to define the preoperative diagnosis of thyroid follicular carcinoma by the vascular pattern and velocimetric parameters using high resolution pulsed and power Doppler ultrasonography (US). We compared the vascular pattern and the velocimetric parameters, such as peak systolic velocity (Vmax), end-diastolic velocity (Vmin), pulsatility ...
Karaman Can Zafer CZ Department of Radiology 09100, Faculty of Medicine, Adnan Menderes University, Aydin, Turkey. - - 2005
To characterize the hypoechoic prostate nodules in the peripheral zone by means of power Doppler ultrasonography (PDUS) and contrast enhanced PDUS (CE-PDUS). Thirty-two patients with dijital rectal examination findings suspicious for malignancy and/or a serum PSA level higher than 4 ng/dl, and who had hypoechoic nodules on transrectal ultrasonography were ...
Sohaib S A - - 2005
AIMS: To evaluate the accuracy of ultrasonography (US) and magnetic resonance imaging (MRI) in characterizing adnexal masses, and to determine which patients may benefit from MRI. METHODS: We prospectively studied 72 women (mean age 53 years, range 19 to 86 years) with clinically suspected adnexal masses. A single experienced sonographer ...
Liang Ping - - 2005
PURPOSE: This study was conducted to evaluate the effectiveness of sonography, especially color Doppler sonography, in the differential diagnosis of cystic hepatic lesions. METHODS: Ninety-two pathologically or clinically proven hepatic cystic lesions (20 cystic malignancies, 24 abscesses, and 48 simple cysts) were evaluated with gray-scale and color Doppler sonography. The ...
Tuncbilek Nermin - - 2005
PURPOSE: The value of the dynamic contrast enhanced-magnetic resonance imaging (DCE-MRI) in differentiating benign and malignant soft tissue tumors was investigated. MATERIALS AND METHODS: Turbo FLASH DCE-MRI was performed on 22 subjects (2-74 years) with soft tissue tumors. Enhancement in the first min (E(max/1)), second min (E(max/2)) and maximum peak ...
Conti Enrico - - 2005
OBJECTIVE: We describe and discuss clinical and color Doppler ultrasound findings of intratesticular varicocele. MATERIAL AND METHODS: Since 1998 we evaluated 295 patients diagnosed with varicocele by scrotal color Doppler sonography Routine andrological assessment has entailed grading the varicocele (Dubin-Amelar scale and Dubin Doppler scale) and the assessment of testicular ...
Ignee A - - 2005
BACKGROUND: Hepatocellular carcinoma (HCC) is a malignant liver tumour with a high prevalence world-wide. For screening procedures conventional transabdominal B-mode ultrasound and AFP determination are commonly used. We investigated 100 consecutive patients with histologically proven hepatocellular carcinoma in order to evaluate sonographic characteristics in unselected patients and to compare native ...
Lobik Leonid - - 2005
PURPOSE: To investigate the temperature distribution and geometry of lesions created by radiofrequency (RF) tissue ablation. MATERIALS AND METHODS: We developed an ex-vivo thermal model based on the ability of egg whites to coagulate at 62 degrees to 65 degrees C. This property allows us to observe and record the ...
Wen Li - - 2005
Castleman's disease is an uncommon disorder of benign lymph-node hyperplasia. Among all the lesions, less than 10% occurs in the neck. Our case differs from those cases previously reported. Multiple lesions were found on both sides of the neck. Contrast-enhanced CT scan showed dotty and stripy enhancement around these lesions, ...
Kofler James M JM - - 2005
A set of tissue-mimicking phantoms containing spherical negative contrast simulated lesions was employed to associate an automated method for determining detectability with human observers. Six alternative methods for computing the lesion signal-to-noise ratio (LSNR) were employed for quantifying automated detecting ability. The six methods differ regarding effective lesion area and ...
Bharat Shyam - - 2005
The variations in the stiffness or stiffness contrast of lesions resulting from radiofrequency (RF) ablation of canine liver tissue at different temperatures and for different ablation durations at a specified temperature are analyzed. Tissue stiffness, in general, increases with temperature; however, an anomaly exists around 80 degrees C, where the ...
Catalano Orlando - - 2005
Recent advances in contrast material-enhanced ultrasonography (US) mainly include (a) development of low-acoustic-pressure (low-mechanical-index) harmonic software, capable of obtaining real-time images without disrupting contrast material microbubbles, and (b) commercialization of new contrast media ("second-generation" contrast media), capable of producing intense echo signals in this low-mechanical-index setting. With use of low-mechanical-index ...
Scialpi M - - 2005
BACKGROUND: We assessed the potential usefulness of contrast-enhanced power Doppler ultrasonography (US) for differentiating pancreatic carcinoma from chronic focal pancreatitis. METHODS: Twenty-six consecutive patients with ductal carcinoma (n=16) and chronic focal pancreatitis (n=10) underwent power Doppler US examinations before and after intravenous injection of an air-based contrast agent (Levovist, Schering, ...
Bartolotta Tommaso Vincenzo - - 2005
The prevalence of benign focal liver lesions (BFLL) is high both in the general population and in patients with known malignancies. The gray-scale ultrasound (US) technique is usually the first-line imaging modality used in the radiological workup of such lesions, but unfortunately it lacks specificity. Furthermore, Doppler examination may often ...
Diebold Thomas - - 2005
Two hundred and fifty-six (256) patients (72% preoperative, 28% pre-Mammotome) were prospectively examined with EIS using the TS 2000 (TransScan Research and Development Center, Israel; temporarily distributed by Siemens, Erlangen) with the "LOS"-software (level of suspicion). All exams were performed with the targeted scan probe, the observer knowing all clinical ...
Tanimoto Keiko - - 2005
Nasoalveolar cyst is a rare nonodontogenic cyst arising in the nasoalar region of the face. In this case, a 39-year-old female had a nontender, fluctuant, soft, round, and bluish lesion in the right anterior gingiva of the right maxilla. Panoramic and magnetic resonance imaging examinatioins were performed. No abnormality was ...
Tse Hung-Fat - - 2005
Lesion dimension of cryoablation. BACKGROUND: Transvenous catheter cryoablation is a novel technique for treating cardiac arrhythmias. However, the relative importance of temporal application parameters on lesion dimension and clinical efficacy has not been studied. METHODS AND RESULTS: We investigated the effects of (1) application duration: single 2.5 (2.5x1) versus single ...
Lam B-Khanh - - 2005
OBJECTIVE: The utilization of diathermy (electrocautery) as an energy source in the treatment of chronic atrial fibrillation has generated positive early clinical results. Although this technology is available and affordable, it has not been well studied for this indication. The objectives of this study were: (1) to characterize atrial lesions ...
Tozaki Mitsuhiro - - 2005
OBJECTIVE: The aim of this study was to evaluate the clinical feasibility of dynamic magnetic resonance (MR) imaging with a 3-dimensional (3D) gradient recalled echo (GRE) volumetric interpolated breath-hold examination (VIBE) sequence to differentiate between benign and malignant solitary pulmonary nodules (SPNs). METHODS: Dynamic 3D GRE VIBE was performed in ...
Itoh Terutomo - - 2005
BACKGROUND: The differentiation of benign from malignant intraductal papillary mucinous tumors (IPMT) is often difficult even by various examination methods. We evaluated the qualitative and quantitative diagnostic ability of contrast-enhanced transabdominal ultrasonography (CE-US), mainly in differentiating benign from malignant tumors in patients with IPMT. PATIENTS AND METHODS: There were 21 ...
Lustgarten Daniel L - - 2005
OBJECTIVES: The purpose of this study was to evaluate the safety and efficacy of cryoablation in a closed chest canine epicardial ablation model. BACKGROUND: Limitations of radiofrequency energy in the epicardial space warrants investigation of alternative energy sources. METHODS: A linear-tip catheter with a 3-cm freezing element and a 6-mm-tip ...
Chiou Hong-Jen - - 2005
OBJECTIVE: The purpose of this study was to evaluate the appearance of primary peripheral soft tissue lymphoma on high-resolution ultrasonography. METHODS: We retrospectively studied the sonograms of 12 patients (5 female and 7 male; age range, 12-90 years; mean, 55 years) with soft tissue lymphoma. All lesions were palpable and ...
Sharma Shyam B - - 2005
Segmental testicular infarction is described in 11-years-old-child presented with acute left hemiscrotal pain and swelling. Clinical examination suggested left testicular tenderness with no evidence of intratesticular mass and the rest of the scrotal contents were normal. Color doppler study suggested a well circumscribed avascular lesion in the upper pole of ...
Jacobs Michael A MA The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA. - - 2005
To investigate the feasibility of combined dynamic contrast enhanced (DCE) and magnetic resonance spectroscopy (MRS) in evaluating breast lesions. Nine patients with positive mammograms scheduled for either biopsy or mastectomy were examined on a 1.5-T MR scanner. DCE was performed with administration of gadolinium-DTPA contrast using a two-dimensional spoiled gradient ...
Goebell Einar - - 2005
This study attempted to evaluate the reliability of ultra-thin T2-weighted imaging with a constructive interference in steady state (CISS) sequence as a screening method for tumors in the cerebellopontine angle. A retrospective study of 200 CISS examinations was made by five investigators. The examinations were inspected on plain film supported ...
Haemmerich Dieter - - 2005
Three methods of creating large thermal lesions with cool-tip cluster electrodes were compared. Three cluster electrodes were arranged 4 cm apart in a triangular array. Eight lesions were created ex vivo in fresh bovine liver (from a butcher) with each method: sequential ablation (three electrodes, 12 minutes each); simultaneous activation ...
Zeller Thomas - - 2004
PURPOSE: Prospective evaluation of the 3- and 6-month results after atherectomy of below-knee arterial lesions with a reference diameter of at least 2.0 mm with use of the Silverhawk device. MATERIALS AND METHODS: Fifty-two below-knee lesions in 33 patients (61% men; mean age, 70 years +/- 11) with chronic peripheral ...
von Herbay Alexandra - - 2004
OBJECTIVE: We investigated the ability of contrast-enhanced sonography with SonoVue (Altana Pharma, Konstanz, Germany), a sulfur hexafluoride microbubble contrast agent, to reveal differences between benign and malignant focal hepatic lesions. METHODS: One hundred twenty-six lesions in 124 patients with focal hepatic lesions detected by B-mode sonography (hepatocellular carcinoma, n = ...
Zeller Thomas - - 2004
PURPOSE: To report the early and 6-month results after atherectomy of femoropopliteal lesions using a new atherectomy device compatible with a 7-F sheath. METHODS: Fifty-two patients (36 men; mean age 67+/-7 years) with stable, chronic lower limb occlusive disease were enrolled prospectively in a study of percutaneous directional atherectomy using ...
Tamaki Katsuyoshi - - 2004
AIMS: To determine whether the presence of large intrahepatic blood vessels (>/=3 mm) affect radiofrequency (RF)-induced coagulation necrosis, the gross and histological characteristics of RF-ablated areas proximal to or around vessels were examined in normal pig livers. METHODS: An RF ablation treatment using a two-stepwise extension technique produced 12 lesions: ...
Izzo L - - 2004
The purpose of this research was to evaluate the role of Echo Colour/Power Doppler and Magnetic Resonance Imaging (MRI) in the diagnosis of expansive parotid lesions, and to establish criteria for differential diagnosis between benign and malignant forms. Forty nine patients (23 males and 26 females), aging from 30 to ...
Dominguez-Roldan J-M - - 2004
Since cadaveric donation is the main source of organs for transplantation in many countries, the diagnosis of brain death is an important issue. The cessation of cerebral circulation is one phenomenon closely related to brain death. Transcranial Doppler sonography is one of the accepted techniques to establish cessation of cerebral ...
Marret Henri - - 2004
OBJECTIVE: To investigate the potential efficacy of real-time contrast-enhanced power Doppler sonography in the differentiation of benign and malignant adnexal masses in a pilot study. METHODS: Before surgical treatment, adnexal masses were prospectively evaluated with power Doppler sonography before and after injection of a contrast agent. Real-time postinjection sequences were ...
Fukunari Nobuhiro - - 2004
Ultrasonography (US) of the thyroid gland has recently proved to be a useful clinical diagnostic method, and the newly developed high-resolution US with a color Doppler flow mapping function can reveal fine details of the thyroid gland and the hemodynamic features of a thyroid neoplasm. US can yield a diagnostic ...
Prakash Mahesh - - 2004
OBJECTIVE: This study was performed to evaluate the role of diffusion-weighted imaging (DWI) in the diagnosis of Japanese encephalitis (JE) and to look for any relationship of the apparent diffusion coefficient (ADC) values with duration of the illness. METHODS: We performed DWI in fourteen patients of JE. T2 weighted (T2W) ...
Cheung Humairah S - - 2004
OBJECTIVE: To investigate the relationship between size and whole lesion enhancement of breast neoplasms. MATERIALS AND METHODS: Fat-suppressed subtraction MRI was performed in 94 breast lesions (44 malignant, 50 benign) with pathologically confirmed diagnoses. Of these, all malignant lesions and 31 of the 50 benign lesions showed enhancement. The degree ...
Albisinni U - - 2004
Thermal ablation with radiofrequency (RF) is gaining increasing attention for the treatment of musculoskeletal lesions. This treatment offers several advantages compared to other methods: reduced invasiveness, low cost, and short hospitalisation time. In June 2001 we began using RF thermal ablation on osteoid osteomas (OO) in the appendicular and axial ...
Romera-Villegas Antonio - - 2004
OBJECTIVE: To determine the clinical usefulness of color duplex sonography in the diagnosis of giant cell arteritis as an alternative to temporal artery biopsy. METHODS: From May 1998 to November 2002, 68 consecutive patients seen in our hospital with a clinical suggestion of active temporal arteritis were included. Forty-eight patients ...
Skanes Allan C - - 2004
INTRODUCTION: The aim of this study was to assess the safety and feasibility of catheter-based cryothermal ablation lesions in the mid- and distal coronary sinus. METHODS AND RESULTS: Cryothermal ablation lesions were delivered using a 7-French catheter at the mid- (n = 13) and distal (n = 12) coronary sinus ...
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