The precision of the 2D/3D registration techniques in measuring the cervical intervertebral foramen morphology
ZHANG Xin-tao,YE Qiang,LI Jian-yi,PENG Peng,LI Shao-Lin
Chinese Journal of Clinical Anatomy ›› 2016, Vol. 34 ›› Issue (5) : 495-498.
The precision of the 2D/3D registration techniques in measuring the cervical intervertebral foramen morphology
Objective To investigate the 2D/3D registration techniques in measurement accuracy of cervical intervertebral foramen morphology in specimens. Method Spiral CT images from 16 cervical specimens were collected to obtain a three-dimensional model through three-dimensional reconstruction. CT scan and lateral radiography with each isolated specimens after changed the position of the specimen were performed. 2D/3D image registration techniques were used to restore the cervical spine’s three-dimensional position where we had taken the X-rays. The bilateral foramen area, anteroposterior diameter and vertical diameter from C2/3 to C6/7 before and after registration were measured using Rapidform XOR3. Results The number of the foramen area, anteroposterior diameter and vertical diameter were measured were 158. Compared with the pre-registration, the registration area of the intervertebral foramen, anteroposterior diameter, and vertical diameter showed no significant difference (P>0.05) by paired samples t-test. The accuracy of the intervertebral foramen area was 96.77%, with a precision of (1.27±1.16) mm2, the accuracy of the anteroposterior diameter was 94.35% with a precision of (0.30±0.27) mm, the diameter of the upper and lower accurate degree was 96.14% with a precision of (0.32±0.28) mm. Conclusion Application of 2D/3D registration techniques to measure cervical intervertebral morphological parameters was high in accuracy and precision.
Cervical spine / Intervertebral foramen / 2D/3D registration
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