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PET/CT 背景噪声及其对语音识别的影响。

PET/CT background noise and its effect on speech recognition.

机构信息

Department of Otorhinolaryngology, Head and Neck Surgery, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Killianstraße 5, 79106, Freiburg, Germany.

Department of Nuclear Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany.

出版信息

Sci Rep. 2021 Nov 11;11(1):22065. doi: 10.1038/s41598-021-01686-5.

DOI:10.1038/s41598-021-01686-5
PMID:34764407
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8585948/
Abstract

Positron emission tomography (PET) has been successfully used to investigate central nervous processes, including the central auditory pathway. Unlike early water-cooled PET-scanners, novel PET/CT scanners employ air cooling and include a CT system, both of which result in higher background noise levels. In the present study, we describe the background noise generated by two state-of-the-art air-cooled PET/CT scanners. We measured speech recognition in background noise: recorded PET noise and a speech-shaped noise applied in clinical routine to subjects with normal hearing. Background noise produced by air-cooled PET/CT is considerable: 75.1 dB SPL (64.5 dB(A)) for the Philips Gemini TF64 and 76.9 dB SPL (68.4 dB(A)) for the Philips Vereos PET/CT (Philips Healthcare, The Netherlands). Subjects with normal hearing exhibited better speech recognition in recorded PET background noise compared with clinically applied speech-shaped noise. Speech recognition in both background noises correlated significantly. Background noise generated by PET/CT scanners should be considered when PET is used for the investigation of the central auditory pathway. Speech in PET noise is better than in speech-shaped noise because of the minor masking effect of the background noise of the PET/CT.

摘要

正电子发射断层扫描（PET）已成功用于研究中枢神经系统过程，包括中枢听觉通路。与早期的水冷式 PET 扫描仪不同，新型的 PET/CT 扫描仪采用空气冷却，并包括 CT 系统，这两者都会导致更高的背景噪声水平。在本研究中，我们描述了两种最先进的空气冷却 PET/CT 扫描仪产生的背景噪声。我们测量了正常听力受试者在背景噪声下的言语识别能力：记录的 PET 噪声和在临床常规中应用的语音噪声。空气冷却 PET/CT 产生的背景噪声相当大：Philips Gemini TF64 为 75.1 dB SPL（64.5 dB(A)），Philips Vereos PET/CT 为 76.9 dB SPL（68.4 dB(A)）。正常听力的受试者在记录的 PET 背景噪声下的言语识别能力明显优于临床应用的语音噪声。两种背景噪声下的言语识别能力均呈显著相关。在使用 PET 研究中枢听觉通路时，应考虑 PET/CT 扫描仪产生的背景噪声。由于 PET/CT 的背景噪声的掩蔽效应较小，因此 PET 噪声中的语音比语音噪声中的语音更好。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/e88652a813c7/41598_2021_1686_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/b7ff5645e541/41598_2021_1686_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/285f4844f927/41598_2021_1686_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/cb075c8afdd5/41598_2021_1686_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/fa5158a57fb4/41598_2021_1686_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/e88652a813c7/41598_2021_1686_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/b7ff5645e541/41598_2021_1686_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/285f4844f927/41598_2021_1686_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/cb075c8afdd5/41598_2021_1686_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/fa5158a57fb4/41598_2021_1686_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1984/8585948/e88652a813c7/41598_2021_1686_Fig5_HTML.jpg

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F-FDG PET Imaging of the Inferior Colliculus in Asymmetric Hearing Loss.低频听阈不对称患者的下丘 F-FDG PET 显像
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