Detection of coronary plaques using MR coronary vessel wall imaging: validation of findings with intravascular ultrasound.
OBJECTIVE
Compared with X-ray coronary angiography (CAG), magnetic resonance imaging of the coronary vessel wall (MR-CVW) may provide more information about plaque burden and coronary remodelling. We compared MR-CVW with intravascular ultrasound (IVUS), the standard of reference for coronary vessel wall imaging, with regard to plaque detection and wall thickness measurements.


METHODS
In this study 17 patients with chest pain, who had been referred for CAG, were included. Patients underwent IVUS and MR-CVW imaging of the right coronary artery (RCA). Subsequently, the coronary vessel wall was analysed for the presence and location of coronary plaques.


RESULTS
Fifty-two matching RCA regions of interest were available for comparison. There was good agreement between IVUS and MR-CVW for qualitative assessment of presence of disease, with a sensitivity of 94% and specificity of 76%. Wall thickness measurements demonstrated a significant difference between mean wall thickness on IVUS and MR-CVW (0.48 vs 1.24 mm, P < 0.001), but great heterogeneity between wall thickness measurements, resulting in a low correlation between IVUS and MR-CVW.


CONCLUSIONS
MR-CVW has high sensitivity for the detection of coronary vessel wall thickening in the RCA compared with IVUS. However, the use of MRI for accurate absolute wall thickness measurements is not supported when a longitudinal acquisition orientation is used.
Department of Radiology, Maastricht University Medical Centre, P. Debyelaan 25, 6229HX, Maastricht, The Netherlands.
Suzanne
S
Gerretsen
Alfons G
AG
Kessels
Patty J
PJ
Nelemans
Jouke
J
Dijkstra
Johan H C
JH
Reiber
Rob J
RJ
van der Geest
Marcus
M
Katoh
Johannes
J
Waltenberger
Jos M A
JM
van Engelshoven
Rene M
RM
Botnar
M Eline
ME
Kooi
Tim
T
Leiner
D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000175:diagnosis* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D016014:Linear Models; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D062645:Percutaneous Coronary Intervention; D058226:Plaque, Atherosclerotic / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011237:Predictive Value of Tests; D012372:ROC Curve; D012680:Sensitivity and Specificity; D018084:Ultrasonography, Interventional