Reproducibility of single-subject fMRI language mapping with AMPLE normalization.

Journal of Magnetic Resonance Imaging : JMRI
James T Voyvodic

Abstract

To evaluate the reproducibility of presurgical functional MRI (fMRI) language mapping based on test-retest scans, comparing traditional activation t-maps to relative activation maps normalized by activation mapping as percentage of local excitation (AMPLE). Language fMRI scans were performed by 12 healthy volunteer subjects undergoing a standard clinical presurgical mapping protocol in multiple independent scan sessions. Objective relative AMPLE activation maps were generated automatically by normalizing statistical t-value maps to the local peak activation amplitude within each functional brain region. The spatial distribution of activation was quantified and compared across mapping algorithms, subjects, scanners, and pulse sequences. The spatial distribution of traditional blood oxygen level-dependent (BOLD) t-value statistical activation maps was highly variable in test-retest scans of single subjects, whereas AMPLE normalized maps were highly reproducible in terms of the location, hemispheric laterality, and spatial extent of relative activation. AMPLE map reproducibility was good regardless of scanner, field strength, or pulse sequence used, but reproducibility was best for scans acquired on the same scanner using the same...Continue Reading

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Citations

Dec 3, 2014·Neuroimaging Clinics of North America·Chris J ConklinFeroze B Mohamed
Dec 3, 2014·Neuroimaging Clinics of North America·Domenico ZacàJay J Pillai
Dec 19, 2015·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Abbas Babajani-FeremiAndrew C Papanicolaou
Feb 6, 2016·Scientific Reports·Mohamed L Seghier, Cathy J Price
Jul 24, 2015·Journal of Magnetic Resonance Imaging : JMRI·Shruti AgarwalJay J Pillai
Jul 16, 2015·Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging·Paul D BaileyJay J Pillai
Sep 12, 2013·NeuroImage·William L Gross, Jeffrey R Binder
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Aug 7, 2019·Topics in Magnetic Resonance Imaging : TMRI·Chris J ConklinFeroze B Mohamed
Apr 14, 2020·The European Journal of Neuroscience·James HigginsTodd Parrish
Jul 28, 2020·Neural Plasticity·Nathan W KongMatthew C Tate
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Aug 7, 2019·Topics in Magnetic Resonance Imaging : TMRI·Shruti AgarwalJay J Pillai
May 1, 2021·Radiologic Clinics of North America·Rozita JalilianhasanpourSachin K Gujar

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