Diagnosis of Acute Cerebral Microinfarcts by Diffusion Weighted Imaging with High b Value / 中国医学影像学杂志

ABSTRACT

Purpose To evaluate the diagnostic value of diffusion weighted imaging with high b value in acute cerebral microinfarcts.Materials and Methods Conventional MRI and diffusion weighted imaging with standard b value (b=1000 s/mm2) and high b value (b=3000 s/mm2) were performed in the 7 patients with acute cerebral infarction,and all the images were evaluated.The signal to noise ration (SNR) and contrast to noise ration (CNR) were measured.Results Five patients were detected much more microinfarcts in high b value as HB group than that in standard b value as SB group.The SNR and CNR were significantly higher in high b value group than that in standard b value group (P＜0.05),but the apparent diffusion coefficient value showed no significant difference between the two groups (P＞0.05).Conclusion DWI with high b value could sensitively detect acute cerebral microinfarcts with high clinical value.