Navicular bone position determined by positional MRI: a reproducibility study.
Skeletal Radiol
; 45(2): 205-11, 2016 Feb.
Article
in En
| MEDLINE
| ID: mdl-26510441
ABSTRACT
OBJECTIVE:
To examine intraobserver, interobserver and between-day reproducibility of positional MRI for evaluation of navicular bone height (NVH) and medial navicular position (MNP). MATERIALS ANDMETHODS:
Positional MRI (pMRI) of the foot was performed on ten healthy participants (0.25 T G-scanner). Scanning was performed in supine and standing position, respectively. Two radiologists evaluated the images in a blinded manner. Reliability and agreement were assessed by calculation of intraclass correlation coefficient (ICC) and 95 % limits of agreement as a percentage of the mean (LOA%).RESULTS:
Intraobserver and interobserver reliability was "substantial" in both supine and standing position (ICC 0.86-0.98) and showed good agreement (LOA% 4.9-14.7 %). Between-day reliability of navicular height and medial navicular position in standing position remained substantial (ICC 0.85-0.92) with adequate agreement (LOA% 8.3-19.8 %). In supine position between-day reliability was "moderate" for NVH (ICC 0.72) and "slight" for MNP (ICC 0.39). Agreement remained adequate between-days for MNP in supine position (LOA% 17.7 %), but it was less than adequate for NVH in supine position (LOA% 24.2 %).CONCLUSION:
Navicular height and medial navicular position can be measured by pMRI in a very reproducible manner within and between observers. Increased measurement variation is observed between-days in supine position, which may be due to small positional differences or other unknown biomechanical factors.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Posture
/
Magnetic Resonance Imaging
/
Tarsal Bones
Type of study:
Observational_studies
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
En
Journal:
Skeletal Radiol
Year:
2016
Document type:
Article
Affiliation country:
Dinamarca
Country of publication:
ALEMANHA
/
ALEMANIA
/
DE
/
DEUSTCHLAND
/
GERMANY