caa a22 4500 463178726 CHVBK 20180406164832.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10278-006-1047-0 doi (NATIONALLICENCE)springer-10.1007/s10278-006-1047-0 Design and Implementation of Gradient Vector Flow Snake to Detect a Reference Object in Pelvic X-Rays for Preoperative Total Hip Arthroplasty Planning Application [Elektronische Daten] [W. Kristanto, P. van Ooijen, B. The, H. Duifhuis, T. Mengko, M. Oudkerk] The main interest of this research project is to promote automation in performing preoperative planning for hip joint replacement surgery using a special medical image viewing software, ViewPro™. Preoperative planning is performed to carefully prepare the surgery and to accurately select the hip implants. The first step of preoperative planning is to calibrate the x-ray image to adjust the magnification factor. A femoral head implant is used as magnification factor reference. Automation is introduced by developing an algorithm to automatically detect this reference object in the image. The algorithm used for performing the automatic detection of the reference object is gradient vector flow (GVF) snake. A study has been performed to compare the newly developed semiautomatic algorithm to the old manual calibration algorithm. The results show a close relation between the two algorithms (less than 1% of average relative difference). It is concluded that the developed semiautomated algorithm can be used as an alternative for performing the manual calibration. SCAR (Society for Computer Applications in Radiology), 2007 Preoperative planning nationallicence total hip arthroplasty nationallicence snake algorithm nationallicence gradient vector flow nationallicence Kristanto W. Department of Radiology, University Medical Center Groningen (UMCG), Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut van Ooijen P. Department of Radiology, University Medical Center Groningen (UMCG), Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut The B. Department of Orthopedics, University Medical Center Groningen, Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut Duifhuis H. Biomedical Engineering Department, State University Groningen, Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut Mengko T. Biomedical Engineering, Electrical Engineering Department, Institut Teknologi Bandung, Ganesha 10, 40132, Bandung, Indonesia aut Oudkerk M. Department of Radiology, University Medical Center Groningen (UMCG), Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut Journal of Digital Imaging Springer-Verlag; http://www.springer-ny.com 20/4(2007-12-01), 373-380 0897-1889 20:4<373 2007 20 10278 https://doi.org/10.1007/s10278-006-1047-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10278-006-1047-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kristanto W. Department of Radiology, University Medical Center Groningen (UMCG), Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut NATIONALLICENCE 700 1- van Ooijen P. Department of Radiology, University Medical Center Groningen (UMCG), Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut NATIONALLICENCE 700 1- The B. Department of Orthopedics, University Medical Center Groningen, Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut NATIONALLICENCE 700 1- Duifhuis H. Biomedical Engineering Department, State University Groningen, Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut NATIONALLICENCE 700 1- Mengko T. Biomedical Engineering, Electrical Engineering Department, Institut Teknologi Bandung, Ganesha 10, 40132, Bandung, Indonesia aut NATIONALLICENCE 700 1- Oudkerk M. Department of Radiology, University Medical Center Groningen (UMCG), Hanzeplein 1, 9700 RB, Groningen, The Netherlands aut NATIONALLICENCE 773 0- Journal of Digital Imaging Springer-Verlag; http://www.springer-ny.com 20/4(2007-12-01), 373-380 0897-1889 20:4<373 2007 20 10278 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer