کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8687177 | 1580841 | 2018 | 54 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Contrasting functional imaging parametric maps: The mislocation problem and alternative solutions
ترجمه فارسی عنوان
نقشه های پارامتری تصویر برداری عملکردی متناقض: مشکل اشتباه و راه حل های جایگزین
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کلمات کلیدی
تصویربرداری عملکردی مغناطیس فوگلوگرافی، نقشه های پارامتریک، تضاد، مقایسه موقعیت مشکل اشتباه
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب شناختی
چکیده انگلیسی
In the field of neuroimaging, researchers often resort to contrasting parametric maps to identify differences between conditions or populations. Unfortunately, contrast patterns mix effects related to amplitude and location differences and tend to peak away from sources of genuine brain activity to an extent that scales with the smoothness of the maps. Here, we illustrate this mislocation problem on source maps reconstructed from magnetoencephalographic recordings and propose a novel, dedicated location-comparison method. In realistic simulations, contrast mislocation was on average â¼10â¯mm when genuine sources were placed at the same location, and was still above 5â¯mm when sources were 20â¯mm apart. The dedicated location-comparison method achieved a sensitivity of â¼90% when inter-source distance was 12â¯mm. Its benefit is also illustrated on real brain-speech entrainment data. In conclusion, contrasts of parametric maps provide precarious information for source location. To specifically address the question of location difference, one should turn to dedicated methods as the one proposed here.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 169, 1 April 2018, Pages 200-211
Journal: NeuroImage - Volume 169, 1 April 2018, Pages 200-211
نویسندگان
Mathieu Bourguignon, Nicola Molinaro, Vincent Wens,