TABLE 4:
Lesion characteristics on DW MR images of the brain
| Characteristic | Lesion |
|||
|---|---|---|---|---|
| Ipsilateral Preprocedural | Contralateral Postprocedural | Ipsilateral | Contralateral | |
| Procedures with lesions* | 10 (14 [7, 25]) | 1 (1 [0, 7]) | 20 (29 [19, 41]) | 6 (9 [4, 17]) |
| No. of lesions | ||||
| Total | 24 | 1 | 52 | 7 |
| Average | 2.4 | NA | 2.6 | 1.2 |
| Range | 1–6 | NA | 1–8 | 1–2 |
| Size | ||||
| <5 mm | 10 (42) | 0 (0) | 36 (69) | 6 (86) |
| 5–10 mm | 7 (29) | 0 (0) | 11 (21) | 0 (0) |
| >10 mm | 7 (29) | 1 (100) | 5 (10) | 1 (14) |
| Location | ||||
| Vertical distribution | ||||
| Upper area of brain | 15 (63) | 1 (100) | 27 (52) | 4 (57) |
| Middle area of brain | 9 (38) | 0 (0) | 20 (39) | 3 (43) |
| Lower area of brain | 0 (0) | 0 (0) | 5 (10) | 0 (0) |
| Horizontal distribution | ||||
| Cortical or subcortical area | 24 (1000) | 1 (100) | 50 (96) | 6 (86) |
| Deep area | 0 (0) | 0 (0) | 2 (4) | 1 (14) |
| Cerebral distribution | ||||
| Frontal lobe | 0 (0) | 0 (0) | 4 (8) | 3 (43) |
| Parietal lobe | 23 (96) | 1 (100) | 38 (73) | 2 (29) |
| Temporal lobe | 1 (4) | 0 (0) | 5 (10) | 0 (0) |
| Occipital lobe | 0 (0) | 0 (0) | 3 (6) | 1 (14) |
| Basal ganglia | 0 (0) | 0 (0) | 1 (2) | 0 (0) |
| Thalamus | 0 (0) | 0 (0) | 1 (2) | 1 (14) |
| Vascular distribution† | ||||
| ACA cortical branches | 1 (4) | 1 (100) | 5 (10) | 2 (29) |
| ACA deep branches | 0 (0) | 0 (0) | 1 (2) | 0 (0) |
| MCA cortical branches | 23 (96) | 0 (0) | 42 (82) | 3 (43) |
| MCA deep branches | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| PCA cortical branches | 0 (0) | 0 (0) | 3 (6) | 1 (14) |
| PCA deep branches | 0 (0) | 0 (0) | 1 (2) | 1 (14) |
Note.—Total of procedures was 70. Data in parentheses are percentages, unless otherwise specified. NA indicates not applicable.
*
Data in brackets are the 95% confidence intervals.
†
PCA indicates posterior cerebral artery.