Fig. 1
From: Periaqueductal gray matter echogenicity as a marker of migraine chronification: a case control study
Magnetic resonance and transcranial sonography images of midbrain axial sections showing the periacueductal gray matter. The TCS images show images from our sonographic laboratory obtained with an ultrasound system for clinical application (Philips Affiniti 70 ultrasound machine). A MRI of the axial section at the level of the midbrain. The square box shows the area corresponding to the magnified TCS image shown in B. B TCS image of the axial midbrain section showing the area of the periaqueductal gray matter echogenicity