Journal article
Comparison of T1ρ, dGEMRIC, and Quantitative T2 MRI in Preoperative ACL Rupture Patients
Academic radiology, Vol.20(1), pp.99-107
01/2013
DOI: 10.1016/j.acra.2012.07.009
PMCID: PMC3525789
PMID: 22981604
Abstract
T1ρ, inversion recovery sequence with a gadolinium contrast agent (dGEMRIC), and T2 mapping have shown sensitivity toward different osteoarthritic-associated compositional changes after joint injury, but have not been studied concomitantly in vivo. We hypothesized that these magnetic resonance imaging sequences can be used to measure early glycosaminoglycan (GAG) losses and collagen disruption in cartilage of anterior cruciate ligament (ACL) rupture patients.
Thirteen acute ACL rupture patients were each imaged during a 4-hour presurgery workup to acquire a fast-spin-echo-based T1ρ sequence, a multi-echo spin-echo T2 sequence, and T1-weighted dGEMRIC an average of 55.7 days after injury. After acquisition, the three sequences' relaxation times were analytically compared.
Site-specific differences were evinced, but nonsignificant differences in mean relaxation time between layers of the same region and sequence were observed (analysis of variance, P < .05). Spearman's correlation coefficients of 0.542 (T1ρ vs. T2, P < .05), −0.026 (T1ρ vs. dGEMRIC, P = .585) and −0.095 (T2 vs. dGEMRIC, P < .05) were found.
No appreciable focal GAG loss was detected by dGEMRIC, and T2 was generally elevated in the early acute phase of blunt trauma injury. In contrast, both general and focal elevations in T1ρ relaxation times were identified, indicating an acute increase in unbound water in the matrix after blunt trauma, and show that patient-specific cartilage changes occur within otherwise healthy, young patients. Further investigation into each sequence's long-term significance is warranted to help clinicians decide which sequence(s) will be the most useful for osteoarthritis prognosis given the challenge of concomitantly acquiring all three in a busy clinical setting.
Details
- Title: Subtitle
- Comparison of T1ρ, dGEMRIC, and Quantitative T2 MRI in Preoperative ACL Rupture Patients
- Creators
- Noelle F Klocke - Department of Orthopaedics and Rehabilitation, The University of Iowa, 2181 J-2 Westlawn Building, Iowa City, IA 52242-1100Annunziato Amendola - Department of Orthopaedics and Rehabilitation, The University of Iowa, 2181 J-2 Westlawn Building, Iowa City, IA 52242-1100Daniel R Thedens - Department of Radiology, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Room 3970 JPP, Iowa City, IA 52242Glenn N Williams - Department of Orthopaedics and Rehabilitation, The University of Iowa, 2181 J-2 Westlawn Building, Iowa City, IA 52242-1100Christopher M Luty - Department of Radiology, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Room 3970 JPP, Iowa City, IA 52242James A Martin - Department of Orthopaedics and Rehabilitation, The University of Iowa, 2181 J-2 Westlawn Building, Iowa City, IA 52242-1100Douglas R Pedersen - Department of Orthopaedics and Rehabilitation, The University of Iowa, 2181 J-2 Westlawn Building, Iowa City, IA 52242-1100
- Resource Type
- Journal article
- Publication Details
- Academic radiology, Vol.20(1), pp.99-107
- DOI
- 10.1016/j.acra.2012.07.009
- PMID
- 22981604
- PMCID
- PMC3525789
- NLM abbreviation
- Acad Radiol
- ISSN
- 1076-6332
- eISSN
- 1878-4046
- Publisher
- Elsevier Inc
- Grant note
- P50 AR055533 / NIH AOSSM
- Language
- English
- Date published
- 01/2013
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Radiology; Electrical and Computer Engineering; Pharmaceutical Sciences and Experimental Therapeutics; Orthopedics and Rehabilitation
- Record Identifier
- 9984040223702771
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