Comput Methods Programs Biomed - Systematic method to assess microvascular recruitment using contrast-enhanced ultrasound. Application to insulin-induced capillary recruitment in subjects with T1DM.

Tópicos

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Resumo

Contrast-enhanced ultrasound (CEU) is an ultrasound imaging technique used to assess tissue perfusion. Analysis of microvascular recruitment necessitates the definition of a region of interest (ROI) containing exclusively the tissues to be studied. Conventional ROI selection requires examining the images and drawing the ROI by hand, making the analysis of CEU images non-reproducible and analyst-dependent. We have designed a systematic ROI selection method that is both reproducible and analyst-independent. Microvascular blood volume (MBV) assessed in 21 sequences of images was used to correlate the systematic ROI selection method with the conventional method performed by two independent analysts (correlation of 0.88 and 0.87 respectively) and the MBV sample distribution from the systematic method was not significantly different from those obtained from the conventional one. Using the systematic method, we found no significant insulin-induced capillary recruitment in subjects with type 1 diabetes mellitus, which might be related to the observed low glucose uptake during the hyperinsulinemic euglycemic clamp compared to healthy patients.

Resumo Limpo

contrastenhanc ultrasound ceu ultrasound imag techniqu use assess tissu perfus analysi microvascular recruit necessit definit region interest roi contain exclus tissu studi convent roi select requir examin imag draw roi hand make analysi ceu imag nonreproduc analystdepend design systemat roi select method reproduc analystindepend microvascular blood volum mbv assess sequenc imag use correl systemat roi select method convent method perform two independ analyst correl respect mbv sampl distribut systemat method signific differ obtain convent one use systemat method found signific insulininduc capillari recruit subject type diabet mellitus might relat observ low glucos uptak hyperinsulinem euglycem clamp compar healthi patient

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