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(a) Overview of observed brain and central sulcus as yellow dotted line of patient 3. (b) Photo of exposed brain. (c) SSHO regions overlain over photo. Each color corresponds to a different SSHO frequency. (d) Numbering of the 18 regions with SSHOs. (e) Color image reconstructed from hyperspectral recording showing the position of the retractor during acquisition [Color figure can be viewed at http://wileyonlinelibrary.com]
