Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Dec 2006
Dual-bolus approach to quantitative measurement of pulmonary perfusion by contrast-enhanced MRI.
To evaluate a dual-bolus approach to pulmonary perfusion MRI. ⋯ A dual-bolus approach to pulmonary perfusion MRI is feasible and may reduce the problem of lacking linear relationship between the contrast-agent concentration and signal intensity.
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J Magn Reson Imaging · Dec 2006
Mapping activation levels of skeletal muscle in healthy volunteers: an MRI study.
To use muscle functional MRI (mfMRI) to compare activation levels within and among triceps surae (TS) muscles. ⋯ There is substantial variation in the level of activation within and among the TS muscles; however, the activation level is mainly in the moderate to low range in all three muscles.
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J Magn Reson Imaging · Dec 2006
Comparative StudyEffectiveness of MR imaging for diagnosing the mild forms of acute pancreatitis: comparison with MDCT.
To assess the usefulness of MRI and determine which MR sequence is most effective for diagnosing the mild forms of acute pancreatitis. ⋯ MRI is helpful for diagnosing the mild forms of acute pancreatitis. We recommend the use of TSE-STIR imaging as part of the routine protocol for evaluating pancreatitis.
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J Magn Reson Imaging · Dec 2006
Cerebral vascular response to hypercapnia: determination with perfusion MRI at 1.5 and 3.0 Tesla using a pulsed arterial spin labeling technique.
To compare the quantification of cerebral blood flow (CBF) at 1.5 and 3.0 Tesla, under normo- and hypercapnia, and to determine the cerebral vascular response (CVR) of gray matter (GM) to hypercapnia, a pulsed arterial spin labeling technique was used. Additionally, to improve GM CBF quantification a high-resolution GM-mask was applied. ⋯ The method presented allows for the quantification of CBF and CVR in GM at the common clinical field strengths of 1.5 and 3.0 Tesla and could therefore be a useful tool to study these parameters under physiological and pathophysiological conditions.