Fig 1.

A−D, Top row: AP and lateral left carotid angiograms pre- (A and B) and postinfusion (C and D) and angioplasty for treatment of subarachnoid hemorrhage vasospasm. Bottom row: Corresponding AP and lateral color-coded images of the DSA acquisitions shown in the top row. E−H, Pretreatment (E and F) and posttreatment (G and H). In addition to improvements in the caliber of the proximal arteries easily seen on the standard DSA images, the color-coded composites show faster and more complete contrast filling of the parenchyma. A red arrow (G) shows that a small middle cerebral artery has been occluded during the treatment. A wedge of no filling in this arterial distribution is easily seen on the color-coded image.