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Fig. 13 Pre-operative thick maximum intensity projection CT of patient with thorocolumbar
congenital scoliosis, rendering of 3D templating results developed with the spine surgery planning
tools, the physical model printed from the plan, and the post-operative radiograph
each pedicle screw. Although the CT data was used to determine that hemivertebrae
resection could be carried out with posterior pedicle screw and hook instrumenta-
tion from T12 to L1 shown in Fig.
4
, it was not possible to model this process in the
software. Instead the surgeon utilized the renderings and model to visually assess
the resection process.
Case Study 2: A 4 year old presented with congenital scoliosis at the cervical-
thoracic junction and at the thoracolumbar spine associated with a complex con-
stellation of medical concerns such as dextrocardia, feeding dif
culty, develop-
mental delay and gastroesophageal re
ux, as shown in Fig.
14
. The congenital
scoliosis at the thoracolumbar spine was caused by a fully segmented hemiverte-
brae. Curve progression from 25
fl
over 2 years time warranted hemivertebrae
resection. CT scan was indicated to evaluate the congenital vertebral anomalies and
to measure the vertebral and pedicle dimensions. A 3-D rapid prototype model was
generated from the pre-operative plan shown in Fig.
14
to con
°
to 35
°
rm that the vertebrae
Fig. 14 Pre-operative thick maximum intensity projection CT of patient with cervical-thoracic
and thoracolumbar congenital scoliosis (upper-left), rendering of 3D templating results developed
with the spine surgery planning tools (upper-right), the physical model (lower-left) printed from
the plan, and the post-operative radiograph (lower-right)
