Single breath-holdT1 measurement using low flip angle TrueFISP
نویسندگان
چکیده
منابع مشابه
Accurate and Efficient Mapping of Flip Angle and T1 using Simultaneous Actual Flip Angle - Variable Flip Angle Imaging (AFI-T1)
Introduction: The knowledge of flip angle values is essential for accurate modeling in many quantitative MRI techniques. Recently, Actual Flip Angle Imaging (AFI) was proposed to account for multiple sources of flip angle variations such as transmit field inhomogeneity, B0 variations, slab profile, and excitation pulse effects [1]. AFI was successfully applied to yield system-independent T1 rel...
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PURPOSE To improve the calculation of T1 relaxation time from a set of variable flip-angle (FA) spoiled gradient recalled echo images. MATERIALS AND METHODS The proposed method: (a) uses a uniform weighting of all FAs, (b) takes into account global inaccuracies in the generation of the prescribed FAs by estimating the actual FAs, and (c) incorporates data-driven local B1 inhomogeneity correct...
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We present a new application of the Nomarski interferometer, to measure the angular position of a parallel laser beam with interfero-metric precision. In our experimental realization we reach a resolution of 3 × 10 −9 rad (6 × 10 −4 ′′) for 1 kHz bandwidth in a 2 × 10 −2 rad (1 •) range. This alternative to the optical lever technique features absolute calibration, independence of the sensitivi...
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Introduction: Quantitative magnetic resonance imaging is a powerful tool for investigating a large variety of biological phenomena. Thus, big efforts have been made during the recent years in order to develop fast methods for the quantitative assessment of various MR parameters. Two very important parameters are the T1 and T2* relaxation times. Here a new method for the simultaneous measurement...
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1 Introduction The spin echo is a fundamental principle (1) that can be used for magnetic resonance imaging. Spin echo techniques are characterized by at least two rf-pulses. The first rf-pulse acts as an excitation pulse that converts longitudinal magnetization into transverse magnetization, and a second rf-pulse after TE/2 is used as a refocusing pulse that (partially) inverts the accumulated...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2006
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.20845