AJNR. American journal of neuroradiology
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AJNR Am J Neuroradiol · Oct 1997
Three-dimensional MR myelography of traumatic injuries of the brachial plexus.
To determine the diagnostic accuracy of three-dimensional MR myelography in the evaluation of traumatic injuries of the brachial plexus. ⋯ Three-dimensional MR myelography can show the majority of traumatic lesions that involve the proximal portion of the brachial plexus in a single rapid examination. On the basis of our findings, we propose this technique as a screening examination for patients with traumatic brachial plexus palsy.
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AJNR Am J Neuroradiol · Oct 1997
Proton MR spectroscopy of delayed cerebral radiation in monkeys and humans after brachytherapy.
To determine whether radiation necrosis can be differentiated from residual/recurrent tumor by proton MR spectroscopy. ⋯ It might be possible to use proton MR spectroscopy to differentiate radiation necrosis from residual/recurrent glioblastoma multiforme on the basis of comparisons with the contralateral hemisphere after radiation therapy.
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AJNR Am J Neuroradiol · Sep 1997
Comparative StudyContrast-enhanced magnetization transfer MR of the brain: importance of precontrast images.
To determine the importance of obtaining precontrast T1-weighted magnetization transfer (MT) MR images for better interpretation contrast-enhanced T1-weighted MT images. ⋯ A significant number of patients had increased signal intensity on noncontrast T1-weighted images with MT that was not seen on noncontrast T1-weighted images without MT. This high signal intensity was also visible on postcontrast MT images, and would have been mistaken for pathologic enhancement if noncontrast MT images had not been available for comparison.
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AJNR Am J Neuroradiol · Aug 1997
Comparative StudySingle-dose gadolinium with magnetization transfer versus triple-dose gadolinium in the MR detection of multiple sclerosis lesions.
To compare the efficacy of single-dose gadolinium with magnetization transfer contrast (MTC) with that of triple-dose gadolinium in detecting enhancing multiple sclerosis lesions. ⋯ Triple-dose gadolinium is more effective (higher sensitivity and interobserver agreement) than single-dose gadolinium in combination with MTC in detecting enhancing multiple sclerosis lesions.
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AJNR Am J Neuroradiol · Aug 1997
Comparative StudyThrombogenicity of hydrophilic and nonhydrophilic microcatheters and guiding catheters.
To assess in a swine model the in vivo thrombogenicity of various microcatheters and guiding catheters as a function of catheter material, catheter coating, and duration of implantation. ⋯ Hydrophilic microcatheters and guiding catheters are less thrombogenic than their nonhydrophilic counterparts, but not all hydrophilic coatings are equally hypothrombogenic. Degree of thrombogenicity depends on catheter material rather than surface morphology. Medium-term implantation did not yield increasing thrombus formation relative to short-term implantation.