Acute
cerebral infarction is a common
disease of the
central nervous system, the key of the current
treatment is to restore
blood flow and save ischemic penumbra .The studies have shown that good
collateral circulation can reduce the
infarction area, improve
prognosis.Thus, an accurate and complete evaluation of
collateral circulation in the early stage of
disease has an important sig -nificance.The development of modern imaging
techniques provides important means for the assessment of
collateral circulation estab -lishment in
acute stroke .In this
paper,
techniques and
methods of the imaging examination of
collateral circulation establishment in a -cute
cerebral infarction and
methods are reviewed, aiming to provide the basis for choosing reasonable imaging modality .