title: Application of multislice spiral CT for guidance of insertion of thoracic spine pedicle screws: an in vitro study.
abstract: To investigate the value of the guidance of three dimensional (3-D) reconstruction of multi-slice spiral CT (MSCT) for the placement of pedicle screws, the 3-D anatomical data of the thoracic pedicles were measured by MSCT in two embalmed human cadaveric thoracic pedicles spines (T1-T10) to guide the insertion of pedicle screws. After pulling the screws out, the pathways were filled with contrast media. The PW, PH, TSA and SSA of developed pathways were measured on the CT images and they were also measured on the real objects by caliper and goniometer. Analysis of variance demonstrated that the difference between the CT scans and real objects had no statistical significance (P > 0.05). Moreover, the difference between pedicle axis and developed pathway also had no statistical significance (P > 0.05). The data obtained from 3-D reconstruction of MSCT demonstrated that individualized standards, are not only accurate but also helpful for the successful placement of pedicle screws.
authors.affiliation: Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University ofScience and Technology, Wuhan 430030, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Wang
authors.forename: Yicheng
authors.initials: Y
authors.lastname: Zhou
authors.forename: Ning
authors.initials: N
authors.lastname: Hu
authors.forename: Renfa
authors.initials: R
authors.lastname: Wang
mesh_terms: D001863:Bone Screws; D002102:Cadaver; D006801:Humans; D021621:Imaging, Three-Dimensional; D019637:Orthopedic Procedures / Q000295:instrumentation / Q000379:methods; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging* / Q000601:surgery*; D036542:Tomography, Spiral Computed / Q000379:methods*