PMC4592682_01
T1 and T2 post imaging sequences. Imaging was obtained 1 month preoperatively and then at several time points postoperatively. Postoperative time points included 1 day, 4 months, and 1 year, 1 month. No edema or abnormalities are seen on the 1 day postop scans. The cystic lesion was first noted on the 4 month postop scan and is visible in both T1 and T2 sequences. The lesion is noted to be stable at 1 year and 1 month postoperatively, with slight involution of the left frontal lesion.
nihms667434f1.jpg
PMC4592682_01_nihms667434f1.jpg
F1
MRI demonstrated mild global cerebral volume loss (Figure 1A). MRI one day postoperatively also confirmed placement (Figure 1B). T2 sequences revealed no hyperintensities or edema along the lead tracts (Figure 1F). The specific absorption rate (SARS) values used for the postoperative MRI are listed in Table 1. MRI demonstrated interval development of cystic encephalomalacia within the frontal lobes just posterior to the deep brain leads, left greater than right (Figure 1C). Stable findings of minimal encephalomalacia at the point of entry of the leads into the superior frontal sulci bilaterally were also noted (Figure 1D).