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ABSTRACT: Two patients with central pontine myelinolysis (CPM) were studied with diffusion-weighted MR imaging 1 week after onset of tetraplegia. In both patients, affected white matter showed hyperintensity on diffusion-weighted images associated with a decrease in apparent diffusion coefficient (ADC) values. In one patient studied serially, ADC values normalized by 3 weeks after tetraplegia. Early in the clinical course, diagnosis of CPM can sometimes be difficult. Hyperintensity on diffusion-weighted images may therefore have diagnostic utility. Decreased lesional ADC values support the notion that CPM is a consequence of relative intracellular hypotonicity.
American Journal of Neuroradiology 10/2001; 22(8):1476-9. · 2.93 Impact Factor
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ABSTRACT: There are EM effects on biology that are potentially both harmful and beneficial. We have reviewed applications of EM fields that are relevant to MS. It is possible that EM fields could be developed into a reproducible therapy for both symptom management and long-term care for MS. The long-term care for MS would have to include beneficial changes in the immune system and in nerve regeneration.
Physical Medicine and Rehabilitation Clinics of North America 09/1998; 9(3):659-74. · 1.40 Impact Factor
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ABSTRACT: Future developments in teleradiology hinge on the delivery of real
or near real-time images, sometimes across less than optimal bandwidth
communication channels. Ultrasound, to achieve its greatest diagnostic
value, needs to transmit not just still images but video as well. A
significant amount of compression, however, may be required to achieve
near real-time video across limited bandwidths. This will inevitably
result in degraded video quality. A variety of compression algorithms
are in widespread use including H.261, H.323, JPEG (Joint Photographic
Experts Group), MPEG (Motion Picture Expert Group) and most recently
wavelets. We have developed a suite of tools to evaluate each of these
methods, and to identify potential areas where wavelet compression may
have an advantage. In this particular study, we compare motion wavelet
compression to motion JPEG compression using the standard correlation
coefficient and the normalized mean squared error, and found the motion
wavelet technique slightly better
Information Technology Applications in Biomedicine, 1998. ITAB 98. Proceedings. 1998 IEEE International Conference on; 06/1998
