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  Indian J Med Microbiol
 

Figure 3: Contact Doppler ultrasonography patterns of blood flow in cortical M4 branches of middle cerebral artery according to the severity of perfusion deficit. (a) Gross perfusion deficit on computed tomography perfusion with mean transit time prolongation more than 14 s (>180% of contralateral values) nd corresponding cortical blood flow (b); (c) Persistent severe perfusion defcit on computed tomography perfusion with mean transit time prolongation more than 8 s (>160% of contralateral values) and corresponding cortical blood flow (d); (e) Moderate perfusion defcit on computed tomography perfusion with mean transit time prolongation more than 6 s (>140% of contralateral values) and corresponding cortical blood flow (f)

Figure 3: Contact Doppler ultrasonography patterns of blood flow in cortical M4 branches of middle cerebral artery according to the severity of perfusion deficit. (a) Gross perfusion deficit on computed tomography perfusion with mean transit time prolongation more than 14 s (>180% of contralateral values) nd corresponding cortical blood flow (b); (c) Persistent severe perfusion defcit on computed tomography perfusion with mean transit time prolongation more than 8 s (>160% of contralateral values) and corresponding cortical blood flow (d); (e) Moderate perfusion defcit on computed tomography perfusion with mean transit time prolongation more than 6 s (>140% of contralateral values) and corresponding cortical blood flow (f)