modern tcd phased array ultrasound diagnostic probe held in left hand of doctor in blue medical glove

angiopathy array background blood blue brain cable cell clots color curves device diagnose diagnostic diagnostics disease display doctor doppler embolism equipment examination glove hand healthcare held hemorrhage left medical modern narrowed neurological neurology paradoxical phased probe scan sickle sonography sterile stroke subarachnoid tcd transcranial transducer ultrasound usg vasospasm vessels