Uncertainty quantification of TMS simulations considering MRI segmentation errors
Uncertainty quantification of TMS simulations considering MRI segmentation errors
复制标题
考虑 MRI 分割误差的 TMS 模拟的不确定性量化
DOI:
10.1088/1741-2552/ac5586
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发表时间:
2022
影响因子:
4
通讯作者:
Guilleminot, Johann
中科院分区:
文献类型:
--
作者:
Zhang, Hao;Gomez, Luis J;Guilleminot, Johann
ObjectiveTranscranial magnetic stimulation (TMS) is a non-invasive brain stimulation method that is used to study brain function and conduct neuropsychiatric therapy. Computational methods that are commonly used for electric field (E-field) dosimetry of TMS are limited in accuracy and precision because of possible geometric errors introduced in the generation of head models by segmenting medical images into tissue types. This paper studies E-field prediction fidelity as a function of segmentation accuracy.ApproachThe errors in the segmentation of medical images into tissue types are modeled as geometric uncertainty in the shape of the boundary between tissue types. For each tissue boundary realization, we then use an in-house boundary element method to perform a forward propagation analysis and quantify the impact of tissue boundary uncertainties on the induced cortical E-field.Main resultsOur results indicate that predictions of E-field induced in the brain are negligibly sensitive to segmentation errors in scalp, skull and white matter (WM), compartments. In contrast, E-field predictions are highly sensitive to possible cerebrospinal fluid (CSF) segmentation errors. Specifically, the segmentation errors on the CSF and gray matter interface lead to higher E-field uncertainties in the gyral crowns, and the segmentation errors on CSF and WM interface lead to higher uncertainties in the sulci. Furthermore, the uncertainty of the average cortical E-fields over a region exhibits lower uncertainty relative to point-wise estimates.SignificanceThe accuracy of current cortical E-field simulations is limited by the accuracy of CSF segmentation accuracy. Other quantities of interest like the average of the E-field over a cortical region could provide a dose quantity that is robust to possible segmentation errors.
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DOI:
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发表时间:
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期刊:
影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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Hirata Akimasa
DOI:
--
发表时间:
2017
期刊:
影响因子:
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作者:
B. Staber;J. Guilleminot
通讯作者:
J. Guilleminot
影响因子:
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通讯作者:
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