The four points of probe placement in Focused Abdominal Sonogram for trauma (FAST) in blunt thoraco-abdominal trauma are -
Epigastrium, (R) hypochondrium, (L) Lower chest, hypogastrium
Epigastrium, (R) and (L) Hypochondria, (R) Iliac fossa
Epigastrium, (R) and (L) Lumbar regions, hypogastrium
Hypogastrium, (R) and (L) Lumbar regions, (R) lower chest