The use of a custom made atlas as a template for corrective surgeries of asymmetric patients

TY - CHAP

T1 - The use of a custom made atlas as a template for corrective surgeries of asymmetric patients

AU - AlHadidi, Abeer

AU - Cevidanes, Lucia H.

AU - Cook, Richard

AU - Festy, Frederic

AU - Tyndall, Donald

AU - Paniagua, Beatriz

PY - 2012

Y1 - 2012

N2 - Aim: The use of conventional mirror images does not adequately guide surgeons on the correction of facial asymmetries. The purpose of this study was to evaluate the utility of an individualized atlas as a template for corrective surgeries for patients suffering from mandibular asymmetry. The patient-specific atlas is calculated from both the original asymmetric mandible and the mirror of the same mandible registered on the cranial base. Material and Method: Three patients with history of favorable clinical outcome of the correction of their mandibular asymmetry were chosen for this pilot study. CBCT were taken before and 6 weeks after corrective surgery using NewTom 3G. Each volume was mirrored and rigidly registered on the cranial base. Surface models for both the mandible and its registered mirror were used to compute an atlas using deformable fluid registration. Corrective surgery was simulated based of the resulting atlas. Differences between the virtual simulated outcome and the actual surgical outcome were computed using UNC SPHARM-PDM toolbox. Results: The detected differences between the virtual simulated outcome and the actual surgical outcome, as characterized in 6 degrees of freedom, were smaller than 2 mm of translation and 5 degrees of rotation. This indicates that the location of the synthesized template is similar to the desired clinical outcome. Conclusions: The construction of patient-specific atlases using non-rigid registration has the potential to optimize and increase the predictability of the outcome of craniofacial corrective surgeries for asymmetric patients.

AB - Aim: The use of conventional mirror images does not adequately guide surgeons on the correction of facial asymmetries. The purpose of this study was to evaluate the utility of an individualized atlas as a template for corrective surgeries for patients suffering from mandibular asymmetry. The patient-specific atlas is calculated from both the original asymmetric mandible and the mirror of the same mandible registered on the cranial base. Material and Method: Three patients with history of favorable clinical outcome of the correction of their mandibular asymmetry were chosen for this pilot study. CBCT were taken before and 6 weeks after corrective surgery using NewTom 3G. Each volume was mirrored and rigidly registered on the cranial base. Surface models for both the mandible and its registered mirror were used to compute an atlas using deformable fluid registration. Corrective surgery was simulated based of the resulting atlas. Differences between the virtual simulated outcome and the actual surgical outcome were computed using UNC SPHARM-PDM toolbox. Results: The detected differences between the virtual simulated outcome and the actual surgical outcome, as characterized in 6 degrees of freedom, were smaller than 2 mm of translation and 5 degrees of rotation. This indicates that the location of the synthesized template is similar to the desired clinical outcome. Conclusions: The construction of patient-specific atlases using non-rigid registration has the potential to optimize and increase the predictability of the outcome of craniofacial corrective surgeries for asymmetric patients.

U2 - 10.1117/12.911048

DO - 10.1117/12.911048

M3 - Conference paper

SN - 978-0-8194-8966-1

VL - 8317

SP - -

BT - MEDICAL IMAGING 2012: BIOMEDICAL APPLICATIONS IN MOLECULAR, STRUCTURAL, AND FUNCTIONAL IMAGING

A2 - Molthen, RC

A2 - Weaver, JB

PB - SPIE - INT SOC OPTICAL ENGINEERING

CY - BELLINGHAM

T2 - Conference on Medical Imaging - Biomedical Applications in Molecular, Structural and Functional Imaging

Y2 - 5 February 2012 through 7 February 2012

ER -