title: Estimation of intra-operative brain shift using a tracked laser range scanner.
abstract: Intra-operative brain shift limits the usefulness of image-guided neurosurgery systems (IGNS), which are based on pre-operative images. Methods that are being developed to address this problem need intra-operative measurements as input. In this work, we present an intra-operative surface shift measurement technique that relies on a tracked 3D laser range scanner. This scanner acquires both 3D range data and 2D images, which are co-registered. We compare two methods to derive displacements at every point in the field of view. The first one relies on the registration of the 2D images; the second relies on the direct 3D registration of the 3D range data. Our results, based on five data sets, show that the 2D method is preferable.
authors.affiliation: Vanderbilt University, Department of Electrical Engineering, Nashville, TN, USA.
authors.forename: Siyi
authors.initials: S
authors.lastname: Ding
authors.forename: Michael I
authors.initials: MI
authors.lastname: Miga
authors.forename: Reid C
authors.initials: RC
authors.lastname: Thompson
authors.forename: Prashanth
authors.initials: P
authors.lastname: Dumpuri
authors.forename: Aize
authors.initials: A
authors.lastname: Cao
authors.forename: Benoit M
authors.initials: BM
authors.lastname: Dawant
mesh_terms: D000465:Algorithms; D001932:Brain Neoplasms / Q000175:diagnosis* / Q000601:surgery*; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods; D007430:Intraoperative Care / Q000379:methods*; D007834:Lasers; D009038:Motion; D019635:Neurosurgical Procedures / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013382:Subtraction Technique; D025321:Surgery, Computer-Assisted / Q000379:methods*