Cerebral infarct secondary to traumatic internal carotid artery dissection

Figure 4 Imaging of case 3. A: Computed tomography (CT) revealed left frontotemporal infarction (ellipse); B: Head CT angiography revealed a thin middle cerebral artery (arrow); C: Cervical CT angiography revealed left internal carotid artery occlusion (arrow); D: A 3D-CT scan showed a cervical spinous process fracture (ellipse); E and F: Transcranial doppler showed asymmetry between the blood flow velocities of the two middle cerebral artery caused by left traumatic internal carotid artery dissection; G: When the right internal carotid artery was subjected to a neck compression test, the velocity of the anterior communicating artery rapidly decreased to zero and recovered when the compression was released. In E-G: FVd is the diastolic blood flow velocity, FVm is the mean blood flow velocity, FVs is the systolic blood flow velocity, and PI is the pulsatility index. MCA: Middle cerebral artery.