CT anatomic study and 3D reconstruction of lumbar nerve roots and main adjacent structures / 局解手术学杂志

Objective To observe the positional relationship of lumbar nerve roots and its main adjacent structures with CT data, and to conduct 3D construction and measurement,so as to provide anatomical basis for percutaneous lumbar diskectomy(PLD).Methods CT serial tomography dataset of 30 healthy adults' lumbosacral portions were imported into Mimics 17.0 software to segment related structures and obtain the layers of different structures.The structures were 3D reconstructed and virtually demonstrated.The lumbar nerve roots and their main surrounding structures were observed and measured.Results The minimum distances between the lumbar nerve roots and the superior articular processes increased gradually from L3 to L4 intervertebral disc layer to L5 to S1 intervertebral disc layer.The 3D model clearly displayed the morphology and spatial relationship of the lumbar nerve roots and their adjacent structures in lumbosacral portion.The lower the lumbar intervertebral discs were,the thicker they were.The distances from the middle point of the back of lumbar intervertebral disc to the end of the superior spinous process of lumbar vertebra increased at first and decreased then,and the distance in L3 to L4 intervertebral disc layer was the farthest.Conclusion The relationship between lumbar nerve roots and superior articular processes,the intervertebral disc thickness variance and the change of the distances from lumbar intervertebral disc to the end of the superior spinous process have been analyzed in this study,and the clinic basis has been laid for percutaneous lumbar diskectomy.

Diagnostic Value of 64-slice Spiral CT Coronary Angiography in the Parietal Coronary Artery / 实用放射学杂志

Objective To study the imaging manifestations of parietal coronary artery and the diagnostic value with 64-slice spiral CT.Methods 1000 patients with clinically suspected coronary heart disease underwent 64-slice spiral CT scan,the images were dealed with curved planar reconstruction and analysed at workstation.Results Parietal coronary arteriae were found in 380 patients,among them,314 cases were at the LAD,32 cases were at the CX,13 cases were at the RCA and multiple arteriae involved in 21cases.Conclusion 64-slice spiral CT coronary angiography is an effective methed in diagnosis of parietal coronary artery.