Biomedical Engineering Reference
In-Depth Information
MRI (T2-weighted) axial section of the patient at the same level. A
low-attenuation tumor is seen in the CT study (see arrow), centered
about the left jugular foramen. The MRI study shows extension of
the tumor within the bone marrow space of the lower clivus all
the way to the contralateral hypoglossal canal (see arrows). This
extension was not appreciated in the CT study at any window/level
setting and the MRI scan substantially altered the plan of treatment.
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(b)
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Figure 3.14. (a) Axial CT image with contrast, and (b)
axial MR image (T2-weighted) of a patient with a low-
grade chondrosarcoma (see text). Figure courtesy of
N. Liebsch, MGH, USA.
Case 2
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RL
RL
R
R
L
L
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Figure 3.15. (a) Axial MR image (T2-weighted) at the
level of C2, and (b) axial CT image with a double-contrast
myelogram of a patient at the same level with a chordoma
of the cranio-cervical junction after partial resection (see
text). Figure courtesy of N. Liebsch, MGH, USA.
Figure 3.15 shows two scans of a patient with a chordoma of
the cranio-cervical junction after partial resection, including
