MRI performed on dedicated knee coils is inaccurate for the measurement of tibial tubercle trochlear groove distance

Objective Tibial tubercle trochlear groove distance (TTD) is a significant factor in patello-femoral instability. Initially described on CT scans with the knee in full extension, the measurement has been validated on MR scans. Dedicated knee MRI coils have subsequently superseded both CT and MRI bod...

Full description

Saved in:
Bibliographic Details
Published in:Skeletal radiology 2014-03, Vol.43 (3), p.345-349
Main Authors: Aarvold, A., Pope, A., Sakthivel, V. K., Ayer, R. V.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Anatomic Landmarks - pathology
Child
CT imaging
Equipment Design
Equipment Failure Analysis
Female
Humans
Imaging
Joint Instability - pathology
Magnetic resonance imaging
Magnetic Resonance Imaging - instrumentation
Magnetics - instrumentation
Male
Measurement
Medicine
Medicine & Public Health
Nuclear Medicine
Orthopedics
Patellofemoral Joint - pathology
Pathology
Radiology
Reproducibility of Results
Scientific Article
Sensitivity and Specificity
Tibia - pathology
Transducers
Young Adult
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Objective Tibial tubercle trochlear groove distance (TTD) is a significant factor in patello-femoral instability. Initially described on CT scans with the knee in full extension, the measurement has been validated on MR scans. Dedicated knee MRI coils have subsequently superseded both CT and MRI body coils for knee imaging. However, the knee rests in partial flexion within the dedicated knee coil. The objective of this study is to investigate whether images from dedicated knee MRI coils produce different TTD measurements from MR body coils. Materials and methods Thirty-two symptomatic knees (27 patients) had simultaneous knee MR scans performed in both a dedicated knee coil and a body coil. TTD measurements were independently compared to assess whether the coil type used affected TTD. Results Patients’ ages ranged from 10 to 27 years (mean 15 years). Mean TTD in the dedicated knee coil (partially flexed knee) was 11.3 mm compared with 19.9 mm in the body coil (that permits full knee extension). The mean difference was 8.6 mm, which was highly significant ( p  
ISSN:0364-2348
1432-2161
DOI:10.1007/s00256-013-1790-5