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- W3113647480 abstract "Abstract The Transcranial Doppler method (TCD) enables the measurement of cerebral blood flow velocity and detection of emboli by applying the ultrasound probe to the temporal bone window, orbital, or greater occipital foramen. TCD is widely used for the evaluation of cerebral vasospasm after subarachnoid hemorrhage, early detection of patients with arterial stenosis and the check of brain death. However, measurements often become difficult in elderly women. Among various factors for this problem, we focused on the effect of the skull bone on the ultrasound penetration into the brain. Especially, the effect of the temporal bone structure was investigated. Using a 2D digital bone model, wave propagation through the skull bone was investigated by the Finite-Difference Time-Domain (FDTD) method. We create bone models which have different BV/TV (Bone Volume/Total Volume) in diploe. Around BV/TV about 60% (similar to elderly women), the observed maximum amplitude decrease due to multiple reflection and scattering. The results suggest that effects of osteoposis on the skull make TCD measurement difficult." @default.
- W3113647480 created "2021-01-05" @default.
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- W3113647480 date "2020-12-15" @default.
- W3113647480 modified "2023-09-27" @default.
- W3113647480 title "Effects of the cancellous bone structure in the skull on ultrasonic wave propagation" @default.
- W3113647480 doi "https://doi.org/10.21203/rs.3.rs-124985/v1" @default.
- W3113647480 hasPublicationYear "2020" @default.
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