Anatomical Study of Lumbosacral Spinal Nerves by Using 3D-FIESTA MRI
Jian Pu,Zeng Nanlin,Jian Su,et al Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637007
To study the value of MR three-dimensional fast imaging employing steady-state acquisition (3D FIESTA) sequence in the demonstration of lumbosacral spinal nerves.Materials and Methods: 45 healthy subjects aged 27～65 years and without abnormal spine and spinal cord were included. MR 3D FIESTA sequence scans were performed from the diaphragm to the sacrum with following parameters: TR/TE 4.2～6.2ms/2.0～3.0ms, TI 113～131ms, bandwidth 125.0kHz, thickness 1mm, overlap 0.5mm, Matrix 384×224. The original data of 3D FIESTA was transmitted to GE AW 4.0 workstation to reconstruct spinal nerves by using multiplanar volume reconstruction(MPVR).The demonstrations, orientation angles and diameters of spinal nerves and its branches on MPVR images were noted. Results: L1～L5 spinal nerve trunks could be demonstrated well on MPVR images. The segments of the nerves posterior to the ganglions were seen as low signal line surrounded by high signal intensity. 0, 0, 100%, 91%and 100%of the third order of branches of L1～L5 spinal nerves could also be demonstrated, respectively. The orientation angles or diameters of the nerves were not significantly different between the left and right sides. Conclusion: 3D-FIESTA sequence can well demonstrate the anatomy of lumbosacral spinal nerves.
【CateGory Index】： R445.2