Computed Tomography Angiography and Perfusion Imaging of Acute Stroke

The traditional thrust of diagnostic radiology has been in the evaluation of tissue structure and any changes in structure that result from a variety of pathologies. With the increasing sophistication and power of digital computers and technologic advances in imaging methods, it has become routinely possible to image organ function, and in particular vascular physiology, in addition to providing traditional anatomic information. These developments have brought a whole new dimension to the practice of neurology, neuroradiology, and neurosurgery. We can now routinely investigate the fundamental changes underlying cere-brovascular disease; that is, we can demonstrate vascular physiology as exemplified by bulk blood flow and parenchymal or tissue perfusion. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.