Table 5: Fourteen Examinations in Seven Patients (Group 2: Patients No. 2,3,5,7, 12,15,16) Matched CT/MRI Images of Tissue Alterations in Unilateral MCA Area (Shift, Oedema, Tissue Hypodensity, Clot) or Hydrocephalus

Patient Exam N20 ratio 1/vMCA ratio CT/MRI N20_amp Vasospasm Symptoms
2 2 0.458 0.426 1 1 1 1
2 3 0.384 0.456 1 1 1 1
2 4 0.336 0.472 1 1 1 1
3 11 0.599 0.52 1 0 0 1
5 21 0.61 0.566 1 0 0 1
5 22 0.474 0.537 1 0 1 1
5 23 0.475 0.495 1 0 1 1
5 24 0.499 0.448 1 0 1 1
5 25 0.549 0.513 1 0 0 1
7 32 0.529 0.591 3 0 0 1
12 48 0.49 0.516 1 0 1 1
15 60 0.557 0.64 1 0 1 1
15 61 0.309 0.467 1 0 0 1
16 66 0.639 0.622 1 0 0 1

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).