Delayed gadolinium-enhanced magnetic resonance imaging (dGEMRIC) of hip joint cartilage in femoroacetabular impingement (FAI): Are pre- and postcontrast imaging both necessary?
✍ Scribed by Bernd Bittersohl; Harish S. Hosalkar; Young-Jo Kim; Stefan Werlen; Klaus A. Siebenrock; Tallal C. Mamisch
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 429 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0740-3194
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✦ Synopsis
Abstract
The purpose of this study was to assess if delayed gadolinium MRI of cartilage using postcontrast T~1~ (T~1Gd~) is sufficient for evaluating cartilage damage in femoroacetabular impingement without using noncontrast values (T~10~). T~1Gd~ and Δ__R__~1~ (1/T~1Gd~ − 1/T~10~) that include noncontrast T~1~ measurements were studied in two grades of osteoarthritis and in a control group of asymptomatic young‐adult volunteers. Differences between T~1Gd~ and Δ__R__~1~ values for femoroacetabular impingement patients and volunteers were compared. There was a very high correlation between T~1Gd~ and Δ__R__~1~ in all study groups. In the study cohort with Tonnis grade 0, correlation (r) was −0.95 and −0.89 with Tonnis grade 1 and −0.88 in asymptomatic volunteers, being statistically significant (P < 0.001) for all groups. For both T~1Gd~ and Δ__R__~1~, a statistically significant difference was noted between patients and control group. Significant difference was also noted for both T~1Gd~ and Δ__R__~1~ between the patients with Tonnis grade 0 osteoarthritis and those with grade 1 changes. Our results prove a linear correlation between T~1Gd~ and Δ__R__~1~, suggesting that T~1Gd~ assessment is sufficient for the clinical utility of delayed gadolinium MRI of cartilage in this setting and additional time‐consuming T~10~ evaluation may not be needed. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc.