Search results for "Power doppler"

Ultrasonographic Detection of Vascularity of Focal Breast Lesions: Microvascular Imaging Versus Conventional Color and Power Doppler Imaging.

2021

To compare microvascular flow imaging (MVFI) to conventional Color-Doppler (CDI) and Power-Doppler (PDI) imaging in the detection of vascularity of Focal Breast Lesions (FBLs). A total of 180 solid FBLs (size: 3.5–45.2 mm) detected in 180 women (age: 21–87 years) were evaluated by means of CDI, PDI, and MVFI. Two blinded reviewers categorized lesion vascularity in absent or present, and vascularity pattern as (a) internal; (b) vessels in rim; (c) combined. The presence of a “penetrating vessel” was assessed separately. Differences in vascularization patterns (chi2 test) and intra- and inter-observer agreement (Fleiss method) were calculated. ROC analysis was performed to assess performance…

Study of neurinomas with ultrasound contrast media: review of a case series to identify characteristic imaging patterns

2011

The aim of this study was to evaluate whether there exists a characteristic distribution pattern of vessels within neurinomas that may be used to characterise this type of lesion by employing a contrast-specific ultrasound technique.Between January 2003 and May 2010, 66 suspected neurinomas were evaluated according to their sonographic features (solid fusiform mass with well-defined margins located in direct continuity with the nerve that was not always discernible and heterogeneous as a result of the presence of small cystic areas or calcifications). The lesions were examined using a sonographic contrast medium consisting of sulphur hexafluoride microbubbles and equipment with dedicated co…

PANCREATIC CARCINOMA VERSUS CHRONIC FOCAL PANCREATITIS: CONTRAST-ENHANCED POWER DOPPLER ULTRASONOGRAPHY FINDINGS

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, Berlin, Germany). Final diagnosis was obtained by surgery in all patients. The following parameters before and after intravenous administration of contrast agent were evaluated for each lesion: number, morphology and course of the vessels within the lesion and time to maximum dete…

P29.02: Assessment of placental vascularization by three-dimensional power Doppler to evaluate effect of mifepristone vs. placebo in early pregnancy

2007

Discrepancy between power-Doppler voiding urosonography and voiding cystourethrography is not relevant for the management of primary vesicoureteric r…

2006

The aim of this study was to assess if discrepancy between power-Doppler voiding urosonography (PD-VUS) and voiding cystourethrography (VCUG) affects the management of patients with primary vesicoureteric reflux (VUR).Fifty-six children with suspected or known VUR were assessed both by PD-VUS and VCUG. Two independent observers, both pediatric surgeons, each aware of the results of only one imaging modality, advised children's management according to present care standards. Agreement between diagnostic findings at the two imaging modalities and between therapeutic advice of the two observers was evaluated using kappa statistics.PD-VUS diagnosed VUR in 3 patients and 6 ureteral units more th…

Utilidad del color doppler, power doppler y el contraste sonográfico en el diagnóstico por imagen del cáncer de próstata localizado

2012

Objetivos: 1º. Estudiar el rendimiento diagnóstico de la ecografía transrectal en escala de grises, power doppler y del contraste sonográfico en el diagnóstico precoz por imagen del cáncer de próstata localizado. 2º. Comparar la rentabilidad diagnóstica de la biopsia prostática aleatoria con la biopsia ecodirigida mediante power doppler y contraste sonográfico, en el diagnóstico precoz por imagen del cáncer de próstata localizado. Material y métodos: Se diseñó un estudio epidemiológico prospectivo y transversal de ámbito provincial, para estudiar el rendimiento diagnóstico de la ecografía transrectal en escala de grises (EG), Power Doppler (PD) y del contraste sonográfico (CS) en el diagnós…