Doppler Tomography
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Compression of the Left Atrium and Pulmonary Veins Due to Ascending and Descending Aortic Aneurysms
Abstract An 89-year-old female patient presented to our cardiology outpatient clinic complaining of shortness of breath and back pain. Chest X-ray demonstrated a widened mediastinum. Transthoracic echocardiography showed an ascending aortic aneurysm and the modified apical 5-chamber view showed that left atrium was compressed between the ascending and descen
Braz. J. Cardiovasc. Surg.. Publicado em: 2020-04
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2. Celiac artery compression: Dunbar syndrome
Resumo A síndrome da compressão da artéria celíaca, também denominada síndrome do ligamento arqueado mediano, síndrome do eixo celíaco ou síndrome de Dunbar, é uma doença rara causada pela compressão extrínseca do tronco celíaco pelo ligamento arqueado mediano. Ultrassonografia Doppler, angiotomografia computadorizada, angiorressonância magné
J. vasc. bras.. Publicado em: 30/05/2019
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3. Can contrast-enhanced ultrasound with second-generation contrast agents replace computed tomography angiography for distinguishing between occlusion and pseudo-occlusion of the internal carotid artery?
OBJECTIVE: The purpose of this study was to evaluate the effectiveness of contrast-enhanced ultrasound with a second-generation contrast agent in distinguishing between occlusion and pseudo-occlusion of the cervical internal carotid artery, comparing it with that of conventional Doppler ultrasound and the gold standard, computed tomography angiography. METH
Clinics. Publicado em: 2015-01
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4. Imaging studies for diagnosing Graves' orbitopathy and dysthyroid optic neuropathy
Although the diagnosis of Graves' orbitopathy is primarily made clinically based on laboratory tests indicative of thyroid dysfunction and autoimmunity, imaging studies, such as computed tomography, magnetic resonance imaging, ultrasound and color Doppler imaging, play an important role both in the diagnosis and follow-up after clinical or surgical treatment
Clinics. Publicado em: 2012-11
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5. Uma análise espectroscópica de discos de acresção em variáveis cataclísmicas / A Spectroscopic Analysis of Accretion Disks in Cataclysmic Variables
An observational study of accretion disks in Cataclysmic Variables (CVs) is presented in this work. Time-resolved spectrophotometric data of the emission line profiles are analyzed. The line emissivity of the systems is mapped using the Doppler tomography technique. The basic orbital parameters of the systems, like the orbital period, mass, orbital inclinati
Publicado em: 2006
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6. Integral field spectroscopy of the Homunculus nebula / Espectroscopia de campo integral do Homúnculo de eta Carinae
The Homunculus nebula was mapped using the integral field technique and the results are presented in this dissertation. The observations were obtained in the J band in the range from 10620 Å to 12960 Å using the CIRPASS s IFU, which contains 499 hexagonal lenses. The spatial sampling is 0,25"/lens and the spectral resolution, set to R=3200. The [Fe II]
Publicado em: 2005
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7. 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
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8. Spiral computed tomography angiography in the assessment of middle cerebral artery occlusive disease.
There has been no report on the use of spiral computed tomography angiography (CTA) in the investigation of intracranial cerebral artery stenosis. A prospective pilot study was conducted to investigate the feasibility of CTA in the diagnosis of intracranial occlusive disease and its correlation with transcranial Doppler. With transcranial Doppler, 10 patient
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9. Anomalous pulmonary venous drainage shown by duplex sonography, computed tomography, and plain radiography.
In a patient with the scimitar syndrome duplex Doppler sonography was used to show the point of entry of the abnormal pulmonary vein into the inferior vena cava to determine blood flow. Chest radiography and computed tomography also showed the vein descending to the diaphragm.
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10. 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
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11. Comparison of the Doppler perfusion index and intraoperative ultrasonography in diagnosing colorectal liver metastases. Evaluation with postoperative follow-up results.
OBJECTIVE: The authors compared the accuracy of intraoperative ultrasound with the Doppler perfusion index (DPI) in the detection of occult liver metastases. SUMMARY BACKGROUND DATA: Intraoperative ultrasound is well recognized to be very sensitive in the detection of small liver tumors. Previous studies using duplex/color Doppler sonography have shown that
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12. Transthoracic coronary flow reserve and dobutamine derived myocardial function: a 6-month evaluation after successful coronary angioplasty
After percutaneous transluminal coronary angioplasty (PTCA), stress-echocardiography and gated single photon emission computerized tomography (g-SPECT) are usually performed but both tools have technical limitations. The present study evaluated results of PTCA of left anterior descending artery (LAD) six months after PTCA, by combining transthoracic Doppler
BioMed Central.