Abnormal Right Vertebral Artery

Dr. Sanjoy SanyalAssociate Dean and Clinical Neuroscience Professor

Abnormal Right Vertebral Artery

• This is a composite MRA image of the Cerebral Circulation

• Next slide contains an embedded video of 3-D Time of Flight (TOF) Spoiled Gradient Recall (SPGR) Echo MRA images

• The slides thereafter are enlarged screen shots from the MRA series

Abnormal Right Vertebral Artery

• All are enlarged screen shots of 3-D Time of Flight (TOF) Spoiled Gradient Recall (SPGR) Echo Acquisition MRA series

• Narrow Right Vertebral Artery is clearly visible in this image

Abnormal Right Vertebral Artery

• The successive MRA images are TOF sequence, as if the Head is rotating clockwise

• An ‘Accessory’ Right Vertebral Artery becomes visible in this image

Abnormal Right Vertebral Artery

• Narrow Right Vertebral Artery is clearly visible

• The ‘Accessory’ Vertebral Artery is clearly separate from the narrow one on the right side

Abnormal Right Vertebral Artery

• Continuing with Time of Flight (TOF) Spoiled Gradient Recall (SPGR) Echo Acquisition series of MRA Images

• Same findings as previous slide

• Imagine the head is rotating clockwise

Abnormal Right Vertebral Artery

• The ‘Accessory’ Right Vertebral Artery gives a communication to Right Internal Carotid and to the Right Vertebral Artery

• This can be seen in the embedded video in the last slide

• The Accessory Artery is intermediate in size between normal Left Vertebral Artery and narrow Right Vertebral Artery

Abnormal Right Vertebral Artery

• The ‘Accessory’

Artery itself is

moving further

postero-laterally

with the clockwise

rotation of head• Narrow Right

Vertebral Artery is

clearly visible as

a bifid artery

Abnormal Right Vertebral Artery

• ‘Accessory’ Right

Vertebral Artery has a

separate distribution

on the Right side

which does not have

a counterpart on the

Left side

• Narrow Right

Vertebral Artery and

communication with

Right Internal Carotid

are clearly visible

Abnormal Right Vertebral Artery

• These images are screen grab views of a 3-D Time of Flight (TOF) Spoiled Gradient Recall (SPGR) Echo Acquisition MRA Images

• Same findings as previous slide

Abnormal Right Vertebral Artery

• These images are screen grab views of a 3-D Time of Flight (TOF) Spoiled Gradient Recall (SPGR) Echo Acquisition MRA Images

• The next slide gives the embedded video of the 2-D TOF axial slice sequence of MRA images

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