منابع مشابه
Magnetic Resonance Angiography Techniques
68 Introduction MR Imaging (MRI) depends on relaxation times T1 and T2 and spin density r. Furthermore, MRI is very sensitive to motion resulting in a variety of flow effects. On one hand, flow effects are responsible for a number of artifacts which can drastically impair the diagnostic value of the images; on the other hand, flow effects can be used advantageously to develop non-invasive techn...
متن کاملMagnetic Resonance Techniques
First the main characteristics of the NMR magnetic measurements, such as accuracy, independence of field direction and zero temperature coefficient are recalled. Then some different magnetic field measuring techniques using NMR, and the conditions to achieve such measurements, are described. Finally, recent NMR applications, used in various domains such as MRI and accelerator-magnet alignment, ...
متن کاملMagnetic Resonance Angiography Techniques
■ ■ Contrast-Enhanced Magnetic Resonance Angiography t1 Shortening phase encoding Considerations acquisition timing acquisition timing: test Bolus acquisition timing: Signal Initiated acquisition acquisition timing: Dynamic Subtraction Contrast-enhanced Magnetic resonance angiography Imaging parameters advantages of Contrast-enhanced Magnetic resonance angiography Limitations of Contrast-enhanc...
متن کاملDiagnostic Methods Magnetic Resonance Imaging
Magnetic resonance (MR) imaging was performed in 14 patients with intracavitary cardiac tumors diagnosed by echocardiography. Except in the patients whose echocardiograms were diagnostic of atrial myxomas, this modality contributed important additional anatomic information regarding the tumor's relationship to the normal intracardiac structures and/or its extension to the adjacent vascular and ...
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ژورنال
عنوان ژورنال: Journal of Vascular Surgery
سال: 1989
ISSN: 0741-5214
DOI: 10.1016/0741-5214(89)90074-8