Anatomical Study of Jugular Bulb with CT Angiography

Objective To provide t imaging anatomy of the jugular bulb and related structure for surgical treatment.Materials and Methods Retrospective three-dimensional reformation of the jugular bulb and related structure was carried on 110 cases of head CTA with CT.Their spatial anatomical characters were observed and analyzed on the views of volume rendering(VR) and multiplanar reformation(MPR) by convention and subtraction CTA.Results There were two type of jugular bubl,flat(56.8%) and upward bulge(43.2%).When the jugular bubl reached or exceeded the floor of the internal auditory canal(10.5%),it was defined as a high jugular bubl,78.3% of high jugular bubl were found in female.The distance between the jugular bubl and the internal auditory canal was longer on the left side,and the distance was decrease with increasing of high of jugular bubl.The drainage forms of transverse sinus was in relation to the shape of jugular bubl,but it was irrespective of the high of the jugular bubl.Conclusion The CTA delineated the anatomic details of the jugular bubl and the relationship of jugular bubl and internal auditory canal,and provide valuable information to imaging diagnosis and surgery of this area.