4Klotz E, Konig M. Pefusion measurement of the brain:Using dynamic CT for the quantitative assessment of cerebral ischemia in acute stroke[J]. Eur J radiol, 1999,30:170.
5Miles KA. Measurenent of tissue perfusion by dynamic computed tomography[J]. BJR, 1991,64(5 ) :409-412.
6KOENIG M, KLOTZ B. Perfusion CT of the brain:diagnostic approach for early detection of ischemic stroke [ J ]. Radiology, 1999,209( 5 ) : 85 - 93.
7MILES K A,LONDON J M. CT staging of renal carcino- ma: a prospective comparison of three dynamic competed tomography techniques [J]. EurJ Radiol, 1991,13( 1 ): 37 - 42.
8JURGEN R,REICHENBACH,JOACHIM R,et al. Acuie stroke evaluated by time-to-peak mapping during initial and early follow up perfusion CT studies [J]. AJNR, 1999,20 : 1842 - 1850.
9ROHL L,SIMONSEN C Z. Viability thresholds of ischemic penumbra of hyperacute stroke defined by perfu- sion-weighted MRI and apparent diffusion coefficient [J]. Stroke,2001,32: 1140-1146.