Effectively Measuring Exercise‐Related Variations in T1ρ and T2 Relaxation Times of Healthy Articular Cartilage
| Autor: | Andrew J. Grainger, Stephen M. McDonnell, James W. MacKay, Martin J. Graves, Fiona J. Gilbert, Alexandra R. Roberts, Scott McDonald, Robert L. Janiczek, Joshua D. Kaggie, Dimitri A. Kessler |
|---|---|
| Přispěvatelé: | Kessler, Dimitri A [0000-0002-1813-1039], MacKay, James W [0000-0001-7558-3800], Kaggie, Joshua D [0000-0001-6706-3442], Apollo - University of Cambridge Repository |
| Rok vydání: | 2020 |
| Předmět: |
Cartilage
Articular musculoskeletal diseases Knee Joint Population Articular cartilage Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Humans Medicine articular cartilage Knee Radiology Nuclear Medicine and imaging repeatability relaxation time education education.field_of_study exercise Tibia business.industry Study Type Cartilage Repeatability musculoskeletal system Evidence level Magnetic Resonance Imaging 3. Good health medicine.anatomical_structure quantitative imaging T2 relaxation business Nuclear medicine MRI |
| Zdroj: | Journal of Magnetic Resonance Imaging |
| ISSN: | 1522-2586 1053-1807 1753-1764 |
| DOI: | 10.1002/jmri.27278 |
| Popis: | BACKGROUND: Determining the compositional response of articular cartilage to dynamic joint-loading using MRI may be a more sensitive assessment of cartilage status than conventional static imaging. However, distinguishing the effects of joint-loading vs. inherent measurement variability remains difficult, as the repeatability of these quantitative methods is often not assessed or reported. PURPOSE: To assess exercise-induced changes in femoral, tibial, and patellar articular cartilage composition and compare these against measurement repeatability. STUDY TYPE: Prospective observational study. POPULATION: Phantom and 19 healthy participants. FIELD STRENGTH/SEQUENCE: 3T; 3D fat-saturated spoiled gradient recalled-echo; T1ρ - and T2 -prepared pseudosteady-state 3D fast spin echo. ASSESSMENT: The intrasessional repeatability of T1ρ and T2 relaxation mapping, with and without knee repositioning between two successive measurements, was determined in 10 knees. T1ρ and T2 relaxation mapping of nine knees was performed before and at multiple timepoints after a 5-minute repeated, joint-loading stepping activity. 3D surface models were created from patellar, femoral, and tibial articular cartilage. STATISTICAL TESTS: Repeatability was assessed using root-mean-squared-CV (RMS-CV). Using Bland-Altman analysis, thresholds defined as the smallest detectable difference (SDD) were determined from the repeatability data with knee repositioning. RESULTS: Without knee repositioning, both surface-averaged T1ρ and T2 were very repeatable on all cartilage surfaces, with RMS-CV SDD) average exercise-induced in T1ρ and T2 of femoral (-8.0% and -5.3%), lateral tibial (-6.9% and -5.9%), medial tibial (+5.8% and +2.9%), and patellar (-7.9% and +2.8%) cartilage were observed. DATA CONCLUSION: Joint-loading with a stepping activity resulted in T1ρ and T2 changes above background measurement error. EVIDENCE LEVEL: 2 TECHNICAL EFFICACY STAGE: 1 J. MAGN. RESON. IMAGING 2020;52:1753-1764. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text