Magnetic resonance imaging for in vivo assessment of three-dimensional patellar tracking

Fellows, R.A.; Hill, Nicholas M.; Gill, H. S.; MacIntyre, Norma J.; Harrison, Mark; Ellis, Randy E.; Wilson, David R.

doi:10.1016/j.jbiomech.2004.07.021

Cited by 73 publications

(98 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The patella positioned more laterally at 0° than 30° of knee flexion and the displacement in patients was significantly larger than that of controls. After the first report, patellar tracking pattern during active knee extension using various measurement systems such as MRI, ultrasound under various conditions was investigated [11][12][13][14][15][16][17][18][19][20][21]. Our result that patellar tracking in patients with patellar dislocation was significantly larger than that of controls at lower knee flexion angle, in agreement with the previous reports.…”

Section: Discussionsupporting

confidence: 86%

“…However, the radiation exposure is invasive to subjects and the measurements are acquired only under static conditions at limited knee flexion angles. On the other hand, various methods for quantitative evaluation of dynamic patellar tracking have been projected in previous studies; such as with custom-made devices for cadaveric specimens [11][12][13], dynamic CT [14], open MRI [15][16][17][18][19], ultrasound transducer [20] and optoelectronic motion capture [21]. However, open MRI and these original measurement systems require special facilities and equipments, and take much cost and time.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative analysis of dynamic patellar tracking in patients with lateral patellar instability using a simple video system

et al. 2016

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Quantitative analysis of dynamic patellar tracking in patients with lateral patellar instability using a simple video system

et al. 2016

View full text Add to dashboard Cite

“…A number of studies, both in vitro [9][10][11][12][15][16][17][18][19][20] and in vivo, [21][22][23][24][25][26][27][28] have dealt with the identification of normal patellar motion, but differences in the accuracy of the measurement system used, range of knee motion examined, magnitude and direction of the load applied, and articular and anatomical conventions, hinder a thorough comparison of the results. 10,13 In only four studies 9,10,18,20 the articular convention for the description of PFJ motion was the same as that of the present study; not in a single the patellar anatomical reference frame definition was the same as that of the present study.…”

Section: D Patellar Motion At the Natural Knee During Passive Flexiomentioning

confidence: 99%

“…10,13 For this goal, patellar motion must be tracked in all six degrees of freedom, thus overcoming the traditional twodimensional X-ray based views. 14 A number of studies, both in vitro [9][10][11][12][15][16][17][18][19][20] and in vivo, [21][22][23][24][25][26][27][28] have dealt with patellar tracking by different methodological approaches and measuring devices. Among them, magnetic resonance and X-ray stereo-photogrammetry do not allow the acquisition of natural and continuous movements in a large range of knee positions.…”

mentioning

confidence: 99%

Three‐dimensional patellar motion at the natural knee during passive flexion/extension. An in vitro study

Belvedere

Leardini

Bianchi

et al. 2009

Journal Orthopaedic Research

View full text Add to dashboard Cite

Patellar maltracking may result in many patellofemoral joint (PFJ) disorders in the natural and replaced knee. The literature providing quantitative reference for normal PFJ kinematics according to which patellar maltracking could be identified is still limited. The aim of this study was to measure in vitro accurately all six-degrees-of-freedom of patellar motion with respect to the femur and tibia on 20 normal specimens. A state-of-the-art knee navigation system, suitably adapted for this study aim, was used. Anatomical reference frames were defined for the femur, tibia, and patella according to international recommendations. PFJ flexion, tilt, rotation, and translations were calculated in addition to standard tibiofemoral joint (TFJ) kinematics. All motion patterns were found to be generally repeatable intra-/ interspecimens. PFJ flexion was 62% of the corresponding TFJ flexion range; tilt and translations along femoral mediolateral and tibial proximodistal axes during TFJ flexion were found with medial, lateral, and distal trends and within 128, 6 and 9 mm, respectively. No clear pattern for PFJ rotation was observed. These results concur with comparable reports from the literature and contribute to the controversial knowledge on normal PFJ kinematics. Their consistence provides fundamental information to understand orthopedic treatment of the knee and for possible relevant measurements intraoperatively. ß

show abstract

“…Additionally, imaging modalities, such as computed tomography (CT) [35,36] and magnetic resonance imaging (MRI) scans [8,18,19,[37][38][39] are increasingly being employed to measure patellar kinematics. The locations of the required landmarks may be digitized from these scans using two-or three-dimensional imaging techniques.…”

Section: Introductionmentioning

confidence: 99%

The effect of coordinate system variation on in vivo patellofemoral kinematic measures

2015

View full text Add to dashboard Cite

Background: The use of different coordinate system definitions for the patella leads to difficulties in comparing kinematic results between studies. The purpose of this work was to establish the effect of using a range of coordinate system definitions to quantify patellar kinematics. Additionally, intra-and inter-investigator repeatabilities of the digitization of anatomic landmarks on the patella were determined. Methods:Four different patellar coordinate system definitions were applied using digitisations in two and three dimensions and a single femoral coordinate system was used for comparison. Intra-investigator variability was established by having one investigator digitize the patellar landmarks of three subjects on five separate occasions.Inter-investigator variability was quantified by having five participants digitize the same landmarks on the same three subjects. Patellofemoral kinematics were quantified for ten subjects, at six angles of tibiofemoral flexion, using MRI. Results:As a result of changes in the patellar coordinate system, differences of up to 11.5° in flexion, 5.0° in spin, and 27.3° in tilt were observed in the resultant rotations for the same motion, illustrating the importance of standardizing the coordinate system definition. Conclusions:To minimize errors due to variability while still maintaining physiologically sensible kinematic angles, a coordinate system based upon an intermediate flexion axis between the most medial and lateral points on the patella, and a 3 superiorly-directed long axis located between the most proximal and distal points on the patella, with an origin at the centre of the most proximal, distal, medial, and lateral points on the patella is recommended.

show abstract

Magnetic resonance imaging for in vivo assessment of three-dimensional patellar tracking

Cited by 73 publications

References 21 publications

Quantitative analysis of dynamic patellar tracking in patients with lateral patellar instability using a simple video system

Quantitative analysis of dynamic patellar tracking in patients with lateral patellar instability using a simple video system

Three‐dimensional patellar motion at the natural knee during passive flexion/extension. An in vitro study

The effect of coordinate system variation on in vivo patellofemoral kinematic measures

Contact Info

Product

Resources

About