title: A method to track cortical surface deformations using a laser range scanner.
abstract: This paper reports a novel method to track brain shift using a laser-range scanner (LRS) and nonrigid registration techniques. The LRS used in this paper is capable of generating textured point-clouds describing the surface geometry/intensity pattern of the brain as presented during cranial surgery. Using serial LRS acquisitions of the brain's surface and two-dimensional (2-D) nonrigid image registration, we developed a method to track surface motion during neurosurgical procedures. A series of experiments devised to evaluate the performance of the developed shift-tracking protocol are reported. In a controlled, quantitative phantom experiment, the results demonstrate that the surface shift-tracking protocol is capable of resolving shift to an accuracy of approximately 1.6 mm given initial shifts on the order of 15 mm. Furthermore, in a preliminary in vivo case using the tracked LRS and an independent optical measurement system, the automatic protocol was able to reconstruct 50% of the brain shift with an accuracy of 3.7 mm while the manual measurement was able to reconstruct 77% with an accuracy of 2.1 mm. The results suggest that a LRS is an effective tool for tracking brain surface shift during neurosurgery.
authors.affiliation: Department of Medical Engineering, Vanderbilt University, Nashville, TN 37235 USA.
authors.forename: Tuhin K
authors.initials: TK
authors.lastname: Sinha
authors.forename: Benoit M
authors.initials: BM
authors.lastname: Dawant
authors.forename: Valerie
authors.initials: V
authors.lastname: Duay
authors.forename: David M
authors.initials: DM
authors.lastname: Cash
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Weil
authors.forename: Reid C
authors.initials: RC
authors.lastname: Thompson
authors.forename: Kyle D
authors.initials: KD
authors.lastname: Weaver
authors.forename: Michael I
authors.initials: MI
authors.lastname: Miga
mesh_terms: D000465:Algorithms; D001185:Artificial Intelligence; D002540:Cerebral Cortex / Q000033:anatomy & histology* / Q000502:physiology* / Q000601:surgery; D004548:Elasticity; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D016247:Information Storage and Retrieval / Q000379:methods; D007834:Lasers; D009068:Movement / Q000502:physiology*; D010363:Pattern Recognition, Automated / Q000379:methods; D019047:Phantoms, Imaging; D013314:Stress, Mechanical; D025321:Surgery, Computer-Assisted / Q000295:instrumentation / Q000379:methods*