Head and Neck Radiology
Correlation between ponticulus of atlas and abnormal morphology of V3 segment of vertebral artery using multi-slice spiral CT angiography
Pinghua Wan, Benxing Wang, Yusheng Liao, Daiping Gao, Fukang Zhang
Published 2016-09-10
Cite as Chin J Radiol, 2016, 50(9): 657-661. DOI: 10.3760/cma.j.issn.1005-1201.2016.09.004
Abstract
ObjectiveTo explore the correlation between ponticulus of atlas and abnormal morphology of V3 segment of vertebral artery.
MethodsAll patients included in this study were underwent CTA and 3D reconstruction examination of intracranial ponticulus and cervical in our workstation, as well as the site, shape of petals and its relationship with vertebral artery was observed. The diameter, shape and trail of vertebral V3 segment were measured and analyzed. The results were analyzed by χ2 test.
ResultsA total of 195 sides (157 cases) ponticulus were detected in 613 cases (1 226 sides), the abnormal morphology of V3 segment of vertebral artery were 103 sides and combined with ponticulus 69 sides among them, including (according to side): the collectivity was 8.4% (103/1 226), combination ponticulus was 35.4% (69/195), uncombination ponticulus was 3.3% (34/1 031), and the risk with ponticulus was increased compared with no ponticulus, and showed statistical significance by Chi-square test (χ2=215.679, P=0.001). The difference of abnormality of vertebral artery was performanced in number, site and shape of ponticulus, we found that the ponticulus composite was 57.1% (12/21) and higher than ponticulus simple 32.8%(57/174) (χ2=4.873, P= 0.027), the ponticulus borderl was 68.8% (11/16) which was also higher than ponticulus posticus (27.2%) and ponticulus lateralis (36.4%) in the ponticulus simple (χ2=11.357, P=0.030), the sharp ones (64.2%) were higher than the blunt (14.6%)in the tip of bony processes of the incomplete type ponticulus (χ2=26.813, P=0.001 ),the smaller ones were higher than the larger in the distance of the gap between the two tips of bony processes in the incomplete type ponticulus (χ2=9.212, P=0.010), and the smallerones (87.5%) were also higher than the larger (28.6%)in the diameter of the hole of complete type ponticulus (χ2=18.193, P=0.001), all of the above ones showed statistical significance among all groups by Chi-square test (P<0.05).
ConclusionsPonticulus of atlas can significantly increase the risk of abnormal morphology of V3 segment of vertebral artery, and the differences of abnormality of vertebral artery were performed in number, site and shape of ponticulus, which included the ponticulus composite, ponticulus borderland, the shape tip of bony processes, the moderate distance between the two lip of bony processes, and the smaller diameter of complete type Ponticulus.
Key words:
Atlanto-occipital joint; Vertebral artery; Angiography; Tomography, spiral computed
Contributor Information
Pinghua Wan
Department of Radiology, Nanhai District Third People's Hospital, Foshan 528244, China
Benxing Wang
Yusheng Liao
Daiping Gao
Fukang Zhang