نتایج جستجو برای: tesla protocol
تعداد نتایج: 257266 فیلتر نتایج به سال:
Vessel wall magnetic resonance imaging at ultra-high field (7 Tesla) can be used to visualize vascular lesions noninvasively and holds potential for improving stroke-risk assessment in patients with ischemic cerebrovascular disease. We present the first multi-modal comparison of such high-field vessel wall imaging with more conventional (i) 3 Tesla hemodynamic magnetic resonance imaging and (ii...
In wireless sensor networks (WSN’s), the broadcast authentication is a critical security service, as it helps users to broadcast the WSN in an authenticable way. μ TESLA and MULTILEVEL μ TESLA are symmetric key based schemes, that have been introduced to provide such services for WSNs, but even they suffer from serious DoS attacks due to the delay in message authentication. Hence in order to ov...
PURPOSE The purpose of this study was to correlate high-resolution magnetic resonance imaging (MRI) and histologic findings in a case of juxtapapillary choroidal melanoma with clinical evidence of optic nerve invasion. METHODS With institutional review board approval, an enucleated globe with choroidal melanoma and optic nerve invasion was imaged using a 7-tesla MRI followed by histopathologi...
We consider the problem of privacy (anonymity) and security in vehicular (V2V) communication, in particular securing routine safety messages. Traditional public key mechanisms are not appropriate for such applications because of the large number of safety messages that have to be transmitted by each vehicle, typically one message every 100−300ms. We first show that a recently proposed V2V commu...
Introduction: Fat suppressed T1-weighted imaging is often an essential component of a clinical MRI exam. Compared to several relatively newer pulse sequences (e.g., spoiled gradient echo, T1FLAIR, FSE), the conventional spin echo (SE) sequence still produces the best T1-contrast and is preferred by many radiologists for certain applications (such as for imaging of head & neck). However, inclusi...
A magnetically programmable cerebrospinal fluid (CSF) shunt valve (Codman Hakim Programmable Valve, Codman, a Johnson & Johnson Company, Raynham, MA) was assessed for magnetic field interactions, heating, artifacts and functional changes at 3-Tesla. The programmable valve showed minor magnetic field interactions and heating (+0.4 degrees C). Artifacts were relatively large in relation to the si...
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