Attenuation Effects of MR Headphones During Brain PET/MR Studies
نویسندگان
چکیده
منابع مشابه
Attenuation Effects of MR Headphones During Brain PET/MR Studies.
UNLABELLED PET/MR offers potential advantages over PET/CT that are currently under investigation. One of the challenges of PET/MR is attenuation correction, as there is no simple correlation between MR signal intensity and the attenuation of 511-keV photons detected in PET. Currently, dedicated MR sequences are used to segment voxels into categories that are then assigned a predetermined attenu...
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متن کاملMeasurements of earplug attenuation under supra-aural and circumaural headphones.
OBJECTIVE Supra-aural audiometric headphones are generally not recommended for use in measuring the attenuation of earplugs, because contact between the headphone and pinna and/or earplug could alter the attenuation obtained, and because of concerns of non-comparability between modes of excitation from supra-aural headphones and the sound-field procedure required by the standardized method. In ...
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ژورنال
عنوان ژورنال: Journal of Nuclear Medicine Technology
سال: 2014
ISSN: 0091-4916
DOI: 10.2967/jnmt.113.131995