Imperial College London
Alternate

DrInesRibeiro Violante

Faculty of Medicine, Department of Brain Sciences

Honorary Research Fellow
 
 
 
//

Contact

 

+44 (0)20 7594 7994i.violante

 
 
//

Location

 

Burlington DanesHammersmith Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Lorenz:2016:10.1016/j.neuroimage.2016.01.032,
author = {Lorenz, R and Monti, RP and Ribeiro, Violante I and Anagnostopoulos, C and Faisal, AA and Montana, G and Leech, R},
doi = {10.1016/j.neuroimage.2016.01.032},
journal = {Neuroimage},
pages = {320--334},
title = {The Automatic Neuroscientist: A framework for optimizing experimentaldesign with closed-loop real-time fMRI},
url = {http://dx.doi.org/10.1016/j.neuroimage.2016.01.032},
volume = {129},
year = {2016}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Functional neuroimaging typically explores how a particular task activates a set of brain regions. Importantly though, the same neural system can be activated by inherently different tasks. To date, there is no approach available that systematically explores whether and how distinct tasks probe the same neural system. Here, we propose and validate an alternative framework, the Automatic Neuroscientist, which turns the standard fMRI approach on its head. We use real-time fMRI in combination with modern machine-learning techniques to automatically design the optimal experiment to evoke a desired target brain state. In this work, we present two proof-of-principle studies involving perceptual stimuli. In both studies optimization algorithms of varying complexity were employed; the first involved a stochastic approximation method while the second incorporated a more sophisticated Bayesian optimization technique. In the first study, we achieved convergence for the hypothesized optimum in 11 out of 14 runs in less than 10 min. Results of the second study showed how our closed-loop framework accurately and with high efficiency estimated the underlying relationship between stimuli and neural responses for each subject in one to two runs: with each run lasting 6.3 min. Moreover, we demonstrate that using only the first run produced a reliable solution at a group-level. Supporting simulation analyses provided evidence on the robustness of the Bayesian optimization approach for scenarios with low contrast-to-noise ratio. This framework is generalizable to numerous applications, ranging from optimizing stimuli in neuroimaging pilot studies to tailoring clinical rehabilitation therapy to patients and can be used with multiple imaging modalities in humans and animals.
AU  - Lorenz,R
AU  - Monti,RP
AU  - Ribeiro,Violante I
AU  - Anagnostopoulos,C
AU  - Faisal,AA
AU  - Montana,G
AU  - Leech,R
DO  - 10.1016/j.neuroimage.2016.01.032
EP  - 334
PY  - 2016///
SN  - 1095-9572
SP  - 320
TI  - The Automatic Neuroscientist: A framework for optimizing experimentaldesign with closed-loop real-time fMRI
T2  - Neuroimage
UR  - http://dx.doi.org/10.1016/j.neuroimage.2016.01.032
UR  - http://hdl.handle.net/10044/1/29479
VL  - 129
ER  -
Download