Validity of an automatic measure protocol in distal femur for allograft selection from a three-dimensional virtual bone
- PDF / 397,356 Bytes
- 8 Pages / 547.087 x 737.008 pts Page_size
- 85 Downloads / 148 Views
ORIGINAL PAPER
Validity of an automatic measure protocol in distal femur for allograft selection from a three-dimensional virtual bone bank system Lucas Eduardo Ritacco • Christof Seiler • German Luis Farfalli • Lutz Nolte Mauricio Reyes • Domingo Luis Muscolo • Luis Aponte Tinao
•
Received: 23 January 2012 / Accepted: 16 March 2012 / Published online: 8 April 2012 Ó Springer Science+Business Media B.V. 2012
Abstract Osteoarticular allograft is one possible treatment in wide surgical resections with large defects. Performing best osteoarticular allograft selection is of great relevance for optimal exploitation of the bone databank, good surgery outcome and patient’s recovery. Current approaches are, however, very time consuming hindering these points in practice. We present a validation study of a software able to perform automatic bone measurements used to automatically assess the distal femur sizes across a databank. 170 distal femur surfaces were reconstructed from CT data and measured manually using a size measure protocol taking into account the transepicondyler distance (A), anterior-posterior distance in medial condyle (B) and anterior-posterior distance in lateral condyle (C). Intra- and interobserver studies were conducted and regarded as
L. E. Ritacco Department of Medical Informatics, Virtual Planning and Navigation Unit, Italian Hospital of Buenos Aires, Buenos Aires, Argentina L. E. Ritacco (&) G. L. Farfalli D. L. Muscolo L. A. Tinao Institute of Orthopedics ‘‘Carlos E. Ottolenghi’’, CINEOT, Italian Hospital of Buenos Aires, Potosı´ 4247, 1199 Buenos Aires, Argentina e-mail: [email protected] C. Seiler L. Nolte M. Reyes Institute for Surgical Technology, University of Bern, Bern, Switzerland
ground truth measurements. Manual and automatic measures were compared. For the automatic measurements, the correlation coefficients between observer one and automatic method, were of 0.99 for A measure and 0.96 for B and C measures. The average time needed to perform the measurements was of 16 h for both manual measurements, and of 3 min for the automatic method. Results demonstrate the high reliability and, most importantly, high repeatability of the proposed approach, and considerable speed-up on the planning. Keywords Bone bank system Lograft selection 3D surgical planning
Introduction For locally aggressive or recurrent benign bone tumors and bone sarcomas, primary tumoral resection with wide margins is considered as a first treatment. This requires a wide surgical resection that entails a residual bone defect, which can be reconstructed with a fresh frozen bone allotransplantation. The improvements in diagnostic and therapeutic techniques have produced an increase of the patient survival as well as decreased complications and side effects, and an improved quality of life (Enneking et al. 1993; Enneking and Campanacci 2001). Indeed, it has been emphasized on the better performance of more biologically oriented bone reconstructions,
123
214
especially in young and physically activ
Data Loading...
