Colour Doppler
Mostrando 1-12 de 62 artigos, teses e dissertações.
-
1. Sonographic patterns of Peyronie's disease in patients with absence of palpable plaques
ABSTRACT Purpose Non-palpable isolated septal plaques of the penis are likely present in a significant number of patients affected by erectile dysfunction (ED) and penile pain without deformity or curvature. The aim of this study was to evaluate the ultrasound (US) patterns observed in patients investigated for ED or penile pain without curvature. Material
Int. braz j urol.. Publicado em: 2018-04
-
2. Sonographic Findings of the Bifid Median Nerve and Persistent Median Artery in Carpal Tunnel: A Preliminary Study in Chinese Individuals
OBJECTIVE: The aim of this study was to investigate the prevalence of anatomic variations of the bifid median nerve, persistent median artery and persistent median vein in Chinese individuals and their relationship with carpal tunnel syndrome. METHODS: One hundred and sixty median nerves were examined using ultrasonography and colour Doppler ultrasonograph
Clinics. Publicado em: 2017-06
-
3. Doppler das artÃrias e veias uterinas e ovarianas na fase lÃtea do ciclo menstrual em portadoras de esquistossomose mansÃnica na forma hepatoesplÃnica
A fim de avaliar a repercussÃo da hipertensÃo porta nos Ãndices de resistÃncia arterial e na drenagem venosa ovariana e uterina, foram estudadas vinte portadoras de esquistossomose mansÃnica na forma hepatoesplÃnica submetidas à esplenectomia e ligadura da veia gÃstrica esquerda (grupo I) e um grupo similar de pacientes nÃo submetidas à cirurgia (g
Publicado em: 2008
-
4. Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow
Flow diagnosis using non-invasive techniques such laser Doppler anemometer (LDA) is an important tool to improve the design of artificial heart valves. In the present study, an experimental protocol to obtain flow velocity field and colour coded maps of turbulent eddies dimensions using LDA measurements in a 25 mm bovine pericardium bio prosthesis valve is r
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-09
-
5. Sensitivity and speed of colour Doppler flow mapping compared with continuous wave Doppler for the detection of ventricular septal defects.
Twenty nine patients (aged from three months to 37 years) with confirmed or suspected ventricular septal defects were studied separately by three examiners who used colour flow mapping and imaging, or continuous wave Doppler and imaging, or a combined reference examination. Colour flow mapping identified 19 of the 25 patients with a ventricular septal defect
-
6. Doppler colour flow mapping: technology in search of an application?
Although Doppler colour flow mapping may considerably reduce the need for conventional pulsed Doppler examination, quantitative flow measurements (particularly by continuous wave Doppler) are still essential in the evaluation of many conditions such as aortic stenosis. Doppler colour flow mapping is an important addition to the accurate non-invasive evaluati
-
7. Transthoracic needle biopsy of thoracic tumours by a colour Doppler ultrasound puncture guiding device.
BACKGROUND--Ultrasound guided transthoracic needle aspiration biopsy has recently been used to obtain specimens for histological diagnosis of pulmonary and mediastinal tumours. Conventional real time, grey scale puncture guiding devices cannot differentiate vascular structures, and clear visualisation of the needle shaft or tip within a desired target is not
-
8. Influence of colour Doppler echocardiography on the ultrasonic assessment of congenital heart disease: a prospective study.
OBJECTIVE--To evaluate the additional information provided by colour Doppler in the ultrasonic assessment of congenital heart disease. PATIENTS AND METHODS--A prospective study of 215 children (age range 1 day-16 years) presenting with clinical signs of congenital heart disease. RESULTS--Colour Doppler was essential for the diagnosis of an anomalous left cor
-
9. Pulmonary artery sling: definitive diagnosis by colour Doppler flow mapping avoiding cardiac catheterisation.
Pulmonary artery sling is a rare abnormality that usually presents in infancy with wheeze or stridor. Diagnoses by cross sectional echocardiography, computed tomography, and magnetic resonance imaging have been described but pulmonary arteriography was regarded as essential for a definite diagnosis. The use of colour Doppler adds to the diagnostic certainty
-
10. Colour Doppler imaging in the demonstration of an orbital varix.
Colour Doppler imaging (CDI) is a recent development in ultrasonography. It allows simultaneous two-dimensional structural imaging and Doppler evaluation of blood flow. Quantitative information on flow velocity is obtained by pulsed Doppler spectral analysis, the colour information being used to choose the vessel of interest. Using this technique the authors
-
11. Localisation of ventricular septal defects by simultaneous display of superimposed colour Doppler and cross sectional echocardiographic images.
Precise non-invasive localisation of the site of a small ventricular septal defect was attempted using a new technique that simultaneously combines conventional cross sectional echocardiography with a Doppler system by superimposing the colour coded direction and velocity of blood flow directly on to real time ultrasound images. Twenty three patients with un
-
12. Advantages of colour flow imaging in the diagnosis of left ventricular pseudoaneurysm.
Eleven cases of left ventricular pseudoaneurysm in nine patients were studied by cross sectional echocardiography, conventional Doppler echocardiography, and colour flow imaging. In two patients recurrent pseudoaneurysms developed after cardiac surgery, three had acute rupture after myocardial infarction, two were the result of stab wounds, one was a late ru