Johannes Achtzehn

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PURPOSE The permanent presence of devices (pacemakers) inside a patient, or the need to use other devices (catheters), for diagnosis and treatment, usually represents a contraindication for a magnetic resonance examination. To help overcome this problem, a novel and noninvasive magnetic resonance system-based concept is proposed to detect potentially unsafe(More)
Pregnancy was diagnosed by transcutaneous ultrasonography in 327 ewes of 2 flocks. In addition transrectal sonography was performed in 93 of these ewes. Two hundred and thirty six ewes were pregnant and 88 animals were non-pregnant. Criteria to assess the accuracy of transrectal and transcutaneous sonography were overall accuracy (correct diagnoses/all(More)
During the summer of 1994, 64 university teacher preparation programs in deaf education and 62 instructional programs providing direct services to deaf and hard of hearing students participated in surveys designed to evaluate the effectiveness of the content and delivery system of Gallaudet University's Doctoral Program in Deaf Education in terms of meeting(More)
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