Table 4: Sixteen Examinations in Eleven Patients (Group 1: Patients No. 1,3,5, 6,9,10, 12,13,14,15,16) Matched CT/MRI Image of no Brain Damage in the Area Supplied by the MCA

Patient Exam N20 ratio 1/vMCA ratio CT/MRI N20_amp Vasospasm Symptoms
1 1 0.913 0.891 0 0 0 0
3 12 0.837 0.885 0 0 0 0
3 13 0.728 0.767 0 0 0 0
3 18 0.981 0.992 0 0 0 0
5 27 0.847 0.816 0 0 0 0
6 28 0.747 0.853 0 0 0 0
9 35 0.893 0.971 0 0 1 0
10 41 0.986 0.954 0 0 0 0
12 52 0.884 1.026 0 0 0 0
13 53 0.854 0.827 0 0 2 0
14 56 0.959 0.876 0 0 2 0
14 57 1.268 1.036 0 0 0 0
15 59 0.789 0.716 0 0 0 0
15 63 0.718 0.666 0 0 0 0
15 64 0.916 0.905 0 0 0 0
16 65 0.715 0.666 0 0 0 0

CT/MRI: MCA area alterations image 0 = no alterations, 1 = transient and reversible lesions (oedema, hypodensity), 2 = structural damage (ischemia, hematoma), 3 = hydrocephalus. N20 amp : 0 = N20 amplitude > 1,2 µV, 1 = N20 amplitude < 1,2 µV. Vasospasm : 0 = absence, 1 = monolateral, 2 = bilateral. Symptoms : 0 = absence, 1 = presence (arm paresis, hemiparesis, hemiplegia or/and consciousness alterations).