Journal of magnetic resonance imaging : JMRI
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To compare image quality including the number of perforators visualized, vessel contrast ratios, and vessel sharpness with blood pool and extracellular contrast agents in abdominal perforator flap magnetic resonance angiography (MRA). ⋯ Perforator MRA image quality including number of perforators visualized, perforator-to-muscle contrast, and vessel sharpness is higher with gadofosveset trisodium compared with gadobenate dimeglumine.
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J Magn Reson Imaging · Mar 2012
Measuring the neural response to continuous intramuscular infusion of hypertonic saline by perfusion MRI.
To determine the extent to which arterial spin labeling (ASL), a functional magnetic resonance imaging technique that directly measures cerebral blood flow (CBF), is able to measure the neural activation associated with prolonged experimental muscle pain. ⋯ This study demonstrates the ability of ASL to measure changes in CBF over extended periods of time and that the neural activation caused by muscle pain is paradigm specific.
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J Magn Reson Imaging · Feb 2012
Comparative StudyHigh-resolution proton density weighted three-dimensional fast spin echo (3D-FSE) of the knee with IDEAL at 1.5 Tesla: comparison with 3D-FSE and 2D-FSE--initial experience.
To assess the feasibility of combining three-dimensional fast spin echo (3D-FSE) and Iterative-decomposition-of water-and-fat-with-echo asymmetry-and-least-squares-estimation (IDEAL) at 1.5 Tesla (T), generating a high-resolution 3D isotropic proton density-weighted image set with and without "fat-suppression" (FS) in a single acquisition, and to compare with 2D-FSE and 3D-FSE (without IDEAL). ⋯ 3D FSE-IDEAL is a feasible approach to acquire multiplanar images of diagnostic quality, both with and without homogeneous "fat-suppression" from a single acquisition.
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J Magn Reson Imaging · Feb 2012
ReviewOncologic applications of diffusion-weighted MRI in the body.
Diffusion-weighted MRI (DWI) allows the detection of malignancies in the abdomen and pelvis. Lesion detection and characterization using DWI largely depends on the increased cellularity of solid or cystic lesions compared with the surrounding tissue. ⋯ DWI can assess response to systemic or regional treatment of cancer at a cellular level and will therefore detect successful treatment earlier than anatomical measures. In this review, we provide a brief technical overview of DWI, discuss quantitative image analysis approaches, and review studies which have used DWI for the purpose of detection and characterization of malignancies as well as the early prediction of treatment response.
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J Magn Reson Imaging · Feb 2012
Comparative StudyFast Dixon whole-body MRI for detecting distant cancer metastasis: a preliminary clinical study.
To evaluate the feasibility of fast Dixon whole-body (WB) magnetic resonance imaging (MRI) for detecting bone and liver metastasis in clinical patients and to compare its performance with skeletal scintigraphy (SS) for detecting bone metastases using reference imaging with >1 year follow-up as the gold standard. ⋯ Fast Dixon WB MRI is feasible in clinical patients, highly specific, and more sensitive than SS in detecting bone metastases, and can detect metastases of the liver.