Magnetic resonance imaging of the triangular fibrocartilage complex / 实用放射学杂志

ABSTRACT

Objective To investigate the value of MR 3D fs SPGR(three-dimensional fat-suppressed spoiled gradient echo se-quence)in displaying the general structure of normal triangular fibrocartilage complex(triangular fibrocartilage disc,palm dorsal dis-tal radioulnar ligament,ulnolunate ligament,ulnotriquetral ligament,ulnar collateral ligament,extensor carpi sheath and articular disc homologues).Methods 1 5 normal adults(30 carpals)were examined withconventional sequences including axial fast spin-echo T1-weighted images (FSE T1 WI)or T2-weighted images (T2 WI),coronal fat-suppressed fast spin-echo T2-weighted images (FSE fsT2 WI)and coronal 3D fs SPGR.As well,3D image reconstruction was performed.Two experienced radiologists read the images with an agreement and recorded the display rate of general structure of TFCC.Results Triangular fibrocartilage disc,articular disc homologuespalm,dorsal distal radioulnar ligament,and extensor carpi sheath were totally showed on coronal and cross sections.Ulnolunate liga-ment and ulnotriquetral ligament were totally seen on the coronal plane,and the display rates on cross-section were 93.3%(28/30), 96.7%(29/30)respectively.Ulnar collateral ligament was seen on cross-section and coronal plane 83.3%(25/30),86.7%(26/30)re-spectively.Conclusion Coronal 3D fs SPGR sequence can be used as a regular sequence for observing TFCC and the surrounding lig-aments .