Hope she is fine. White matter lesions may be due to loss of blood supply to small areas. She also has a superior frontal gyrus lesion. This suggests that was some disturbance in the flow of blood to the anterior part of her brain. She may also have had symptoms of transient ischemic attack.
Alternatively, her MRI picture and her collapse may be unrelated. But the brain lesions will have to be explained. Does she have any other illness diagnosed?