Search Results
Results 301 - 350 of 1097
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Hwang Sung Ho - - 2008
OBJECTIVE: Our purpose was to determine the significance of small hypervascular enhancing lesions exclusively on the arterial phase images of dynamic computed tomography in cirrhotic liver. METHODS: One hundred sixty-nine enhancing lesions (>5 and <30 mm) on the arterial phase images of dynamic computed tomography in 67 patients with cirrhotic ...
Marchesini Ana Carolina da Silva - - 2008
OBJECTIVES: To evaluate the intratumoral reliability of color Doppler parameters and the contribution of Doppler sonography to the gray-scale differential diagnosis of ovarian masses. METHODS: An observational study was performed including 67 patients, 15 (22.4%) with malignant ovarian neoplasm and 52 (77.6%) with benign ovarian diseases. We performed the Doppler ...
Shiode Nobuo - - 2008
BACKGROUND: The sirolimus-eluting stent (SES) has dramatically reduced the rate of restenosis in comparison to that with the bare-metal stent (BMS). In previous studies, the minimal luminal diameter (MLD) of lesions treated with a BMS was shown to improve from 6 months to 1 year. METHODS: To evaluate 6-month and ...
Kwon Bong Cheol - - 2008
PURPOSE: To determine whether sonography can be an alternative method to nerve conduction study (NCS) in the diagnosis of carpal tunnel syndrome (CTS), by comparing sonography with nerve conduction study using clinical diagnosis as the reference standard. METHODS: Forty-one wrists of 29 patients were enrolled, along with the same number ...
Sista Akhilesh K - - 2008
OBJECTIVE: Doppler sonography is not commonly used in evaluation of cystic lesions with internal echoes. Here we report the use of the mechanical properties of color Doppler sonography to further characterize 3 spermatoceles. METHODS: Three patients who came to University of California San Francisco Imaging Center with painless unilateral scrotal ...
Williams Marcus - - 2008
OBJECTIVES: This study sought to evaluate the long-term prognostic value of the number and sites of calcified coronary lesions and to compare the accuracy of number of calcified lesions with the extent of total calcium score. BACKGROUND: There is a strong relationship between mortality and total coronary artery calcium (CAC) ...
Kawaguchi Ren - - 2008
BACKGROUND: Previous studies have demonstrated similar efficacy of the drug-eluting stent (DES) in patients with and without calcified lesions. However, most of the randomized trials have excluded patients with severe calcified lesions. This study aimed to examine the impact of lesion calcium on clinical and angiographic outcome after sirolimus-eluting stent ...
Seket B - - 2008
BACKGROUND: The shape of the induced thermal ablation area is as important as its dimension. The aim of this study was to analyze the size reproducibility and the aspect of the interstitial ultrasonic ablation obtained by a planar transducer in porcine liver in vivo. METHODS: Five pigs were used. Two ...
Persec Zoran - - 2008
Xanthogranulomatous epididymitis is an uncommon non-neoplastic process with destruction of tissue and replacement by striking cellular infiltration of foamy macrophages, dense lymphocytes and plasma cells. We report on a 72-year-old man with a clinical history of inadequately treated arterial hypertension, who presented with a right scrotal mass associated with right ...
Schlossbauer Thomas - - 2008
To evaluate the diagnostic value of breast magnetic resonance imaging (MRI) in small focal lesions using dynamic analysis based on unsupervised vector quantization in combination with a score for morphologic criteria. We examined 85 mammographically indetermintate lesions (BIRADS 3-4; 47 malignant, mean lesion size 1.2 cm; 38 benign, mean lesion ...
van den Bos Indra C - - 2007
PURPOSE: To assess the relationship between lesion size and MR imaging findings of pathologically-proven hepatocellular carcinoma (HCC). MATERIALS AND METHODS: In a retrospective, single-center study, 37 consecutive patients were identified between 1999 and 2005 that underwent preoperative MRI and surgical resection of HCC. A total of 47 lesions (mean size ...
Bazot M - - 2007
OBJECTIVES: To compare the accuracy of transvaginal sonography (TVS) and rectal endoscopic sonography (RES) for the diagnosis of deep infiltrating endometriosis (DIE), with respect to surgical and histological findings. METHODS: This was a longitudinal study of 81 consecutive patients referred for surgical management of DIE, who underwent both TVS and ...
Donmez Fuldem Yildirim - - 2007
OBJECTIVE: The purpose of this study was to determine whether contrast enhancement features on 3D volumetric gradient-recalled echoMR images allow differentiation of benign from malignant solitary pulmonary nodules. MATERIALS AND METHODS: Forty patients with solitary pulmonary nodules (range of greatest diameter, 7-40 mm) detected on CT underwent unenhanced MRI and ...
Kofinas Alexander - - 2007
OBJECTIVE: The purpose of the study was to quantify placental hypoechoic areas without blood flow by means of second trimester high-resolution ultrasound with power color Doppler and to evaluate its relationship to pregnancy outcome. METHODS: Patients referred for second trimester ultrasound from January 2001 to December 2003 were eligible for ...
Jansen Sanaz A SA Department of Radiology, University of Chicago, 5841 S Maryland Ave, MC 2026, Chicago, IL 60637, - - 2007
To retrospectively compare the kinetic and morphologic characteristics of pure ductal carcinoma in situ (DCIS) lesions depicted on dynamic contrast material-enhanced magnetic resonance (MR) images with the nuclear grade and conventional mammographic appearance of these lesions. This HIPAA-compliant retrospective study was institutional review board approved, and informed patient consent was ...
Samuels Joshua - - 2007
Background: The objective was to determine the parameters to making a sizable, controlled lesion deep within the treated tissue using high-intensity focused ultrasound (HIFU). High HIFU intensities allow for rapid temperature rises in tissue used for tumor ablation. Methods: Various experiments were conducted manipulating amplitude and treatment time to produce ...
Khairy Paul - - 2008
INTRODUCTION: Radiofrequency (RF) and cryoenergy are largely considered independent modalities for the transcatheter ablation of cardiac arrhythmias. There are numerous theoretical advantages to engineering a system capable of delivering both energy forms. METHODS AND RESULTS: We designed a hybrid steerable catheter capable of delivering RF and cryoenergy independently, sequentially, and ...
Exacoustos Caterina - - 2007
PURPOSE: To evaluate the role of gray-scale and color Doppler sonography to distinguish uterine leiomyosarcoma (LMS) from leiomyoma (LM). METHODS: We analyzed the preoperative gray-scale and color Doppler sonographic findings of 8 patients with LMS, 21 patients with cellular leiomyomas, and 3 patients with smooth muscle tumors of uncertain malignant ...
Zheng Ke-Guo - - 2007
BACKGROUND: The peripheral enhancement of small hepatocellular carcinoma (SHCC) is a rare appearance in dual phase images by helical computed tomography (CT). This study discusses this phenomenon and its correlative histopathology. METHODS: The helical CT dual phase appearance of peripheral enhancement in SHCC was analyzed in 21 cases (22 lesions). ...
Reddy Vivek Y - - 2008
Similar to the surgical mini-maze procedure, the posterior "box" lesion set employs linear ablation lesions along the anterior aspects of both sets of PVs connected by a roof line and an inferior line to electrically isolate the PVs and complete posterior LA wall en masse. However, creating fully transmural linear ...
Ashley Morris; Harvard Medical ...
We present a case of an 18-year-old woman with recurrent bilateral giant fibroadenomas that were evaluated by mammography and sonography with color Doppler. Imaging revealed solid lobulated masses with significant internal vascularity occupying most of each breast; this evaluation suggested a differential diagnosis of giant fibroadenoma versus phyllodes tumor. The ...
Dai Ying - - 2007
OBJECTIVE: To evaluate whether contrast-enhanced ultrasound (CEUS) with SonoVue could differentiate malignant focal liver lesions (FLLs) from benign lesions and provide lesion type diagnoses. MATERIALS AND METHODS: Four hundred fifty-six patients with 554 FLLs were examined by CEUS with SonoVue using low mechanical index, nonlinear imaging techniques. Each lesion was ...
Mutoh Makoto - - 2007
BACKGROUND: Outcomes after sirolimus-eluting stent (SES: Cypher) implantation remained to be elucidated in Japan. METHODS AND RESULTS: Among 1,070 consecutive angiographic follow-up lesions, 99 lesions underwent target lesion revascularization (TLR) with in-stent restenosis (ISR). Retrospective estimation by multivariate analysis including 50 variables showed that the ostiums of right coronary and ...
Alcázar Juan Luis - - 2007
OBJECTIVE: The purpose of this study was to assess the reproducibility of 3-dimensional (3D) sonography for classifying adnexal masses. METHODS: Eighty-two consecutive women with the diagnosis of an adnexal mass on 2-dimensional transvaginal sonography were reevaluated by 3D sonography, and 3D volume data from each mass were stored. Two different ...
Hauth E A M - - 2008
PURPOSE: 2- and 3-dimensional evaluation of quantitative pharmacokinetic parameters derived from the Tofts model modeling dynamic contrast enhancement of lesions in MR mammography. MATERIALS AND METHODS: In 95 patients, MR mammography revealed 127 suspicious lesions. The initial rate of enhancement was coded by color intensity, the post-initial enhancement change is ...
Ritz Joerg P - - 2008
Thermal ablation techniques like radiofrequency or laser-induced thermotherapy (LITT) are increasingly used to treat tumors of parenchymatous organs. Minimal access, parenchymal preservation, and a low complication rate render them suitable for pulmonary tumors as well. Their successful clinical application depends on the induction of sufficiently large lesions and a knowledge ...
Del Sette Massimo - - 2007
BACKGROUND AND PURPOSE: Right-to-left shunt (RLS) due to patent foramen ovale is a well-established risk factor for cryptogenic stroke and is highly prevalent in cases of migraine, cluster headache, and obstructive apnea. It can be diagnosed by gaseous-contrast transcranial Doppler, yet in a small percentage of cases it cannot be ...
Chen M H - - 2007
AIM: To evaluate the clinical value of contrast-enhanced ultrasound (CEUS) for patients with hepatocellular carcinoma (HCC) in identifying the tumour number, ablation range and feeding vessels before ultrasound-guided radiofrequency ablation (RFA), and to compare the efficacy of RFA after CEUS with the efficacy of RFA after non-enhanced ultrasonography (US) without ...
Matsumoto Naoki - - 2007
We report a case of hepatic pseudolymphoma in a 67-year-old woman that was detected during an abdominal sonography screening. The lesion was further evaluated using CT, MRI, angiography, and contrast-enhanced sonography. The imaging features of this tumor are discussed herein. The diagnosis of pseudolymphoma was achieved via sonographically guided biopsy. ...
Wilson Stephanie R - - 2007
OBJECTIVE: The purpose of this study was to compare the diagnostic accuracy, confidence level, and recommended management of focal liver masses after contrast-enhanced ultrasonography (CEUS) compared with unenhanced ultrasonography alone. METHODS: One hundred sixty-seven patients were referred for CEUS to characterize a focal liver mass. A 2-person blind read determined ...
Williams Teresa C - - 2007
PURPOSE: To retrospectively determine the sensitivity of kinetic features measured with computer-aided evaluation at breast magnetic resonance (MR) imaging in discriminating benign from malignant lesions, with histopathologic findings used as the reference standard. MATERIALS AND METHODS: Institutional review board approval was obtained for this HIPAA-compliant study. Informed consent was waived. ...
Himel Herman D HD - - 2007
Failure of cardiac antiarrhythmic ablation to block action potential conduction produces poor outcomes which lead to repeat procedures. To overcome this, an intraoperative index of the quality of an ablation lesion is needed. We hypothesized that a rise in the translesion stimulus-excitation delay (TED) can indicate a continuous, transmural, linear ...
Testa A C - - 2007
OBJECTIVES: To describe sonographically the distribution patterns of a second-generation contrast agent in the microcirculation of unilocular and multilocular ovarian masses with papillary projections, and to investigate whether qualitative evaluation of the passage of the contrast agent can improve the performance of sonography in distinguishing between benign and malignant masses ...
Shah Zarine K - - 2007
The objective of this study was to determine whether the presence of enhancing and expansile portal vein thrombus is suggestive of the diagnosis of hepatocellular carcinoma. In the presence of hepatic tumors, enhancing expansile portal vein thrombus is highly suggestive of hepatocellular carcinoma.
Reid Frances M FM Medical Research and Evaluation Facility, Battelle, Columbus, OH, USA. - - 2007
A sulfur mustard (SM)-induced cutaneous injury model was developed in weanling swine to evaluate the efficacy of candidate treatment regimens. Lesions were assessed clinically and histopathologically. Histopathologic evaluation of lesions was a subjective and invasive assessment. Biomechanical engineering methods offer an objective and less invasive method to evaluate lesions. The ...
Soon D - - 2007
Few attempts have been made to detect subtle blood-brain barrier (BBB) leakage in visibly non-enhancing MRI lesions in multiple sclerosis (MS). For 19 patients, longitudinal relaxation time (T1) maps were generated from MRI scans obtained before, and at 20, 40 and 60 minutes after injection of gadolinium (Gd)-DTPA (0.3 mmol/kg). ...
Ripley Kenneth Lauren - - 2007
BACKGROUND: Atrio-esophageal fistulas have been described as a consequence of radiofrequency (RF) ablation for the treatment of atrial fibrillation (AF). However, whether cryoablation can avoid this potential fatal complication remains unclear. METHODS AND RESULTS: We studied the effects of direct application of RF and cryoablation on the cervical esophagus in ...
Kajihara Makoto - - 2007
PURPOSE: The objective of this study was to calculate tumor blood flow (TBF) in musculoskeletal lesions and to evaluate the usefulness of this parameter in differentiating malignant from benign lesions and monitoring the treatment response to preoperative chemotherapy. MATERIALS AND METHODS: Altogether, 33 patients with musculoskeletal lesions underwent a total ...
von Herbay A - - 2007
PURPOSE: SonoVue and Levovist (SH U 508A) are both ultrasound contrast agents, which are helpful in characterization and detection of malignant liver lesions. This study was performed to compare both contrast agents according to the capability to diagnose hepatocellular carcinoma (HCC). MATERIALS AND METHODS: In a prospective study, 65 patients ...
Foschini Maria P - - 2007
This study compared echo-color Doppler sonography features of thyroid nodules with the 3-dimensional reconstruction to find parameters useful for the preoperative diagnosis. Forty nodules relative to 29 patients were examined with echo-color Doppler before surgery. After histologic diagnosis, blocks were deparaffinized and prepared for 3-dimensional examination using a stereomicroscope. Echo-color ...
Namkung Sook - - 2007
To evaluate the efficacy of ferucarbotran in T2-weighted (T2W) fast spin-echo (FSE) and T2*W gradient-echo (GRE) sequences for characterizing focal liver lesions. In 68 patients, 46 malignant and 22 benign focal liver lesions were evaluated. Precontrast (NCE) T2W FSE images and contrast-enhanced (CE) T2W FSE and T2*W GRE images were ...
Ungermann Leos - - 2007
OBJECTIVE: To evaluate the prevalence of spoke-wheel pattern and typical symptoms of focal nodular hyperplasia (FNH) by means of dynamic contrast-enhanced ultrasonography (CEUS) in relation to lesion size. METHODS: Twenty-eight patients were included in the trial, in whom, based on the CEUS, we raised suspicion of hypervascularized liver lesion; there ...
Smirniotopoulos James G - - 2007
Contrast material enhancement for cross-sectional imaging has been used since the mid 1970s for computed tomography and the mid 1980s for magnetic resonance imaging. Knowledge of the patterns and mechanisms of contrast enhancement facilitate radiologic differential diagnosis. Brain and spinal cord enhancement is related to both intravascular and extravascular contrast ...
Cosgrave John - - 2007
BACKGROUND: Currently, little data are available on the management of drug-eluting stent (DES) restenosis. Drug resistance may play a role in its etiology. METHODS: We identified all cases of either sirolimus-eluting or paclitaxel-eluting stent restenosis treated with repeated DES implantation. The lesions were divided into those receiving the same DES ...
Lee Young Han - - 2007
We describe a case of actinomycosis of the gallbladder mimicking carcinoma. Sonography showed a hypoechoic mass replacing gallbladder lumen and engulfing a stone; contrast-enhanced computed tomography showed a heterogeneously enhanced thickened gallbladder wall with subtle, disrupted luminal surface enhancement, which formed a mass. As a result of the clinical and ...
Inoue Tatsuo - - 2007
We evaluated the usefulness of contrast-enhanced ultrasonography(US) for detecting and differentiating gallbladder lesions. Contrast-enhanced coded phase-inversion harmonic US was performed on 90 patients with gallbladder abnormalities. After administering Levovist, we observed the gallbladders in real time. Contrast-enhanced coded phase-inversion harmonic ultrasonography was compared with B-mode US and contrast-enhanced computer tomography ...
Chang Ruey-Feng - - 2007
PURPOSE: To retrospectively evaluate the accuracy of neural network analysis of tumor vascular features at three-dimensional (3D) power Doppler ultrasonography (US) for classification of breast tumors as benign or malignant, with histologic findings as the reference standard. MATERIALS AND METHODS: This study was approved by the local ethics committee; informed ...
Di Mario Carlo - - 2007
OBJECTIVES: The aim of the study was the assessment of the clinical, angiographic and procedural characteristics correlated with freedom from adverse events at 1 year in a real life setting of consecutive bifurcation lesions. BACKGROUND: Even if stent implantation has shown to be superior to conventional balloon angioplasty in most ...
Koh Dow-Mu - - 2007
OBJECTIVE: The purpose of this study was to determine the diagnostic accuracy of rim and segmental MRI enhancement of hepatic metastasis of colorectal cancer after administration of mangafodipir trisodium (MnDPDP). SUBJECTS AND METHODS: Sixty-one patients with a potentially resectable hepatic metastasis of colorectal cancer consecutively underwent breath-hold T1-weighted MRI in ...
Ricci P - - 2007
PURPOSE: To assess the efficacy of low mechanical index (MI) real time grey scale contrast-enhanced US (CEUS) in the differentiation of breast lesions in comparison to Magnetic Resonance Imaging (MRI). MATERIALS AND METHODS: 50 lesions previously detected at mammography or conventional US were evaluated by means of CEUS and MRI. ...
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