Determining the longitudinal relaxation time (T1) of blood at 3.0 Tesla
نویسندگان
چکیده
منابع مشابه
Rapid Parametric Mapping of the Longitudinal Relaxation Time T1 Using Two-Dimensional Variable Flip Angle Magnetic Resonance Imaging at 1.5 Tesla, 3 Tesla, and 7 Tesla
INTRODUCTION Visual but subjective reading of longitudinal relaxation time (T1) weighted magnetic resonance images is commonly used for the detection of brain pathologies. For this non-quantitative measure, diagnostic quality depends on hardware configuration, imaging parameters, radio frequency transmission field (B1+) uniformity, as well as observer experience. Parametric quantification of th...
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Knowledge of T(1) relaxation times can be important for accurate relative and absolute quantification of brain metabolites, for sensitivity optimizations, for characterizing molecular dynamics, and for studying changes induced by various pathological conditions. (1)H T(1) relaxation times of a series of brain metabolites, including J-coupled ones, were determined using a progressive saturation ...
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The purpose of this study was to characterize T(1), particularly in the hyperthermia temperature range (ca. 37-44 degrees C), in order to control regional hyperthermia with MR monitoring using 0.2 Tesla, and to improve T(1) mapping. A single-slice and a new multislice "T One by Multiple Read-Out Pulses" (TOMROP) pulse sequence were used for fast T(1) mapping in a clinical MRI hyperthermia hybri...
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OBJECTIVE We aimed to investigate the value of three-dimensional (3D) T1 volumetric isotropic turbo spin echo acquisition (VISTA) in the diagnosis of cervical artery dissection (CAD). METHODS We prospectively included patients who were suspected as having a CAD within 1 month of onset. For T1 VISTA, the diagnosis of the dissection was based on the presence of intramural high-signal, intimal f...
متن کاملT1 contrast in the human brain at 7 Tesla
Introduction: MRI in humans at ultra-high field offers not only high baseline sensitivity but also interesting contrast behavior. Compared to lower field strength T1 relaxation times generally increase but seem to remain highly diverse, promising strong T1 contrast especially in brain imaging. Exploring this potential is mainly hampered by the non-uniformity of the transmit RF fields generate b...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2004
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.20178