PMC6180866_01
Transverse (upper) and coronal (lower) CT scan of the orbits with intravenous contrast showing expansion of the superior, medial and posterior recti in both orbits with significant bilateral proptosis.
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PMC6180866_01_bjrcr.20150385.g001.jpg
fig1
A CT scan of the orbits with intravenous (IV) contrast showed enlarged extraocular muscles in both eyes with possible compression of the left optic nerve (Figure 1).
Dose distribution in the axial plane with 95% isodose (red) and PTV in cyan (upper). Dose-volume histogram (lower) with 95% isodose, PTV, left lens (blue) and right lens (purple). PTV, planning target volume.
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PMC6180866_01_bjrcr.20150385.g002.jpg
fig2
Figure 2 shows the treatment plan and dose volume histogram.