Delayed Gadolinium-Enhanced MRI of Menisci and Cartilage (dGEMRIM/dGEMRIC) in Obese Patients With Knee Osteoarthritis: Cross-Sectional Study of 85 Obese Patients With Intra-articular Administered Gadolinium Contrast

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Abstract

Background: Early cartilage changes in knee osteoarthritis (OA) can be assessed by both intravenous (i.v.) and intra-articular (i.a.) delayed gadolinium-enhanced MRI of cartilage (dGEMRIC). Purpose: To examine the relationship between i.a. dGEMRIC and delayed gadolinium-enhanced MRI of menisci (dGEMRIM), and to investigate if the approach can be used to assess the morphological degeneration of menisci in obese patients with knee OA. Study Type: Cross-sectional. Population: Eighty-five obese patients with knee OA. Field Strength/Sequences: 1.5T. Inversion recovery sequence with four inversion times. Assessment: T1 relaxation times were calculated for posterior weight-bearing femoral cartilage and the posterior horns of the menisci. Meniscus degeneration sum score (0–2) was assessed as increased signal/no signal (1/0) and tear/no tear (1/0). Statistical Tests: T1 relaxation times were compared using Student's t-test. Comparison of cartilage and meniscus T1 relaxation times was done by regression analysis. Analysis of variance (ANOVA) was used for comparison of meniscal T1 relaxation times among the three summed morphological scores (0–2). Statistical analyses were performed with a level of significance at 0.05. Results: For lateral menisci, morphology sum scores of 0, 1, and 2 were found in 13, 58, and 14 patients and for medial menisci in 2, 30, and 30 patients, respectively. Mean T1 relaxation times were 441 msec, 480 msec, and 497 msec for cartilage, lateral menisci, and medial menisci, respectively. T1 relaxation times for the menisci were similar (P = 0.53), and a weak correlation was found between dGEMRIC and dGEMRIM in the lateral compartments (R = 0.26). Comparing dGEMRIM between different morphology sum scores showed no differences (P > 0.4). Data Conclusion: I.a. dGEMRIM showed no correlation between the degree of meniscal degeneration and meniscus T1 relaxation times. I.a. dGEMRIM do not seem to deliver useful information about meniscus degeneration to be suitable for clinical applications, but i.a. dGEMRIC may still be considered an alternative contrast-saving method for cartilage. Level of Evidence: 3. Technical Efficacy: Stage 3. J. Magn. Reson. Imaging 2018;00:000–000.

Detaljer

Författare
  • Stine Hangaard
  • Henrik Gudbergsen
  • Cecilie L. Daugaard
  • Henning Bliddal
  • Janus Damm Nybing
  • Miika T. Nieminen
  • Victor Casula
  • Carl Johan Tiderius
  • Mikael Boesen
Enheter & grupper
Externa organisationer
  • Frederiksberg Hospital
  • University of Oulu
  • Oulu University Hospital
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Radiologi och bildbehandling
  • Ortopedi

Nyckelord

Originalspråkengelska
Sidor (från-till)1700-1706
TidskriftJournal of Magnetic Resonance Imaging
Volym48
Utgivningsnummer6
Tidigt onlinedatum2018 aug 13
StatusPublished - 2018 dec
PublikationskategoriForskning
Peer review utfördJa