Pelvic tracker effects on hip center accuracy using imageless navigation

William Mihalko, Matthew J. Phillips, Zair Fishkin, Kenneth A. Krackow

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Objective: Imageless computer assisted total knee surgical systems have commonly relied on determination of the functional rotational center of the femoral head as a landmark for determining the lower extremity mechanical axis. This has been accomplished through range of motion and center of rotation calculations for the femur with respect to the pelvis as the lower extremity is taken through a range of motion. Our study evaluated the use of this algorithm with and without a pelvic tracker attached to the iliac crest. Materials and Methods: The functional center of the hip joint was also compared to the true radiographic center as determined by spiral CT data. Evaluating the different methods on six lower extremities from three whole-body cadavers revealed significant differences in the location of the calculated hip joint center, but little difference in the resulting lower extremity mechanical axis determination. The functional hip joint centers measured with and without a pelvic tracker differed from one another and from the CT-determined hip center. Results: No differences were found in the coronal plane measurements, but statistically significant differences were found in the sagittal plane measurements. Conclusion: Algorithms that reduce the noise generated by pelvic movement should be devised to eliminate the need for a pelvic tracker.

Original languageEnglish (US)
Pages (from-to)214-218
Number of pages5
JournalComputer Aided Surgery
Volume11
Issue number4
DOIs
StatePublished - Jul 1 2006
Externally publishedYes

Fingerprint

Hip
Lower Extremity
Hip Joint
Navigation
Articular Range of Motion
Spiral Computed Tomography
Thigh
Pelvis
Cadaver
Femur
Noise
Knee

All Science Journal Classification (ASJC) codes

  • Surgery
  • Radiology Nuclear Medicine and imaging

Cite this

Pelvic tracker effects on hip center accuracy using imageless navigation. / Mihalko, William; Phillips, Matthew J.; Fishkin, Zair; Krackow, Kenneth A.

In: Computer Aided Surgery, Vol. 11, No. 4, 01.07.2006, p. 214-218.

Research output: Contribution to journalArticle

Mihalko, William ; Phillips, Matthew J. ; Fishkin, Zair ; Krackow, Kenneth A. / Pelvic tracker effects on hip center accuracy using imageless navigation. In: Computer Aided Surgery. 2006 ; Vol. 11, No. 4. pp. 214-218.
@article{5853d0e5d0304e2ea542738c6b4c8e83,
title = "Pelvic tracker effects on hip center accuracy using imageless navigation",
abstract = "Objective: Imageless computer assisted total knee surgical systems have commonly relied on determination of the functional rotational center of the femoral head as a landmark for determining the lower extremity mechanical axis. This has been accomplished through range of motion and center of rotation calculations for the femur with respect to the pelvis as the lower extremity is taken through a range of motion. Our study evaluated the use of this algorithm with and without a pelvic tracker attached to the iliac crest. Materials and Methods: The functional center of the hip joint was also compared to the true radiographic center as determined by spiral CT data. Evaluating the different methods on six lower extremities from three whole-body cadavers revealed significant differences in the location of the calculated hip joint center, but little difference in the resulting lower extremity mechanical axis determination. The functional hip joint centers measured with and without a pelvic tracker differed from one another and from the CT-determined hip center. Results: No differences were found in the coronal plane measurements, but statistically significant differences were found in the sagittal plane measurements. Conclusion: Algorithms that reduce the noise generated by pelvic movement should be devised to eliminate the need for a pelvic tracker.",
author = "William Mihalko and Phillips, {Matthew J.} and Zair Fishkin and Krackow, {Kenneth A.}",
year = "2006",
month = "7",
day = "1",
doi = "10.1080/10929080600942147",
language = "English (US)",
volume = "11",
pages = "214--218",
journal = "Computer Assisted Surgery",
issn = "1092-9088",
publisher = "Taylor and Francis Ltd.",
number = "4",

}

TY - JOUR

T1 - Pelvic tracker effects on hip center accuracy using imageless navigation

AU - Mihalko, William

AU - Phillips, Matthew J.

AU - Fishkin, Zair

AU - Krackow, Kenneth A.

PY - 2006/7/1

Y1 - 2006/7/1

N2 - Objective: Imageless computer assisted total knee surgical systems have commonly relied on determination of the functional rotational center of the femoral head as a landmark for determining the lower extremity mechanical axis. This has been accomplished through range of motion and center of rotation calculations for the femur with respect to the pelvis as the lower extremity is taken through a range of motion. Our study evaluated the use of this algorithm with and without a pelvic tracker attached to the iliac crest. Materials and Methods: The functional center of the hip joint was also compared to the true radiographic center as determined by spiral CT data. Evaluating the different methods on six lower extremities from three whole-body cadavers revealed significant differences in the location of the calculated hip joint center, but little difference in the resulting lower extremity mechanical axis determination. The functional hip joint centers measured with and without a pelvic tracker differed from one another and from the CT-determined hip center. Results: No differences were found in the coronal plane measurements, but statistically significant differences were found in the sagittal plane measurements. Conclusion: Algorithms that reduce the noise generated by pelvic movement should be devised to eliminate the need for a pelvic tracker.

AB - Objective: Imageless computer assisted total knee surgical systems have commonly relied on determination of the functional rotational center of the femoral head as a landmark for determining the lower extremity mechanical axis. This has been accomplished through range of motion and center of rotation calculations for the femur with respect to the pelvis as the lower extremity is taken through a range of motion. Our study evaluated the use of this algorithm with and without a pelvic tracker attached to the iliac crest. Materials and Methods: The functional center of the hip joint was also compared to the true radiographic center as determined by spiral CT data. Evaluating the different methods on six lower extremities from three whole-body cadavers revealed significant differences in the location of the calculated hip joint center, but little difference in the resulting lower extremity mechanical axis determination. The functional hip joint centers measured with and without a pelvic tracker differed from one another and from the CT-determined hip center. Results: No differences were found in the coronal plane measurements, but statistically significant differences were found in the sagittal plane measurements. Conclusion: Algorithms that reduce the noise generated by pelvic movement should be devised to eliminate the need for a pelvic tracker.

UR - http://www.scopus.com/inward/record.url?scp=33750087864&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33750087864&partnerID=8YFLogxK

U2 - 10.1080/10929080600942147

DO - 10.1080/10929080600942147

M3 - Article

VL - 11

SP - 214

EP - 218

JO - Computer Assisted Surgery

JF - Computer Assisted Surgery

SN - 1092-9088

IS - 4

ER -