Med Biol Eng Comput - Rapid automatic assessment of microvascular density in sidestream dark field images.

Tópicos

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Resumo

The purpose of this study was to develop a rapid and fully automatic method for the assessment of microvascular density and perfusion in sidestream dark field (SDF) images. We modified algorithms previously developed by our group for microvascular density assessment and introduced a new method for microvascular perfusion assessment. To validate the new algorithm for microvascular density assessment, we reanalyzed a selection of SDF video clips (n?=?325) from a study in intensive care patients and compared the results to (semi-)manually found microvascular densities. The method for microvascular perfusion assessment (temporal SDF image contrast analysis, tSICA) was tested in several video simulations and in one high quality SDF video clip where the microcirculation was imaged before and during circulatory arrest in a cardiac surgery patient. We found that the new method for microvascular density assessment was very rapid (<30?s/clip) and correlated excellently with (semi-)manually measured microvascular density. The new method for microvascular perfusion assessment (tSICA) was shown to be limited by high cell densities and velocities, which severely impedes the applicability of this method in real SDF images. Hence, here we present a validated method for rapid and fully automatic assessment of microvascular density in SDF images. The new method was shown to be much faster than the conventional (semi-)manual method. Due to current SDF imaging hardware limitations, we were not able to automatically detect microvascular perfusion.

Resumo Limpo

purpos studi develop rapid fulli automat method assess microvascular densiti perfus sidestream dark field sdf imag modifi algorithm previous develop group microvascular densiti assess introduc new method microvascular perfus assess valid new algorithm microvascular densiti assess reanalyz select sdf video clip n studi intens care patient compar result semimanu found microvascular densiti method microvascular perfus assess tempor sdf imag contrast analysi tsica test sever video simul one high qualiti sdf video clip microcircul imag circulatori arrest cardiac surgeri patient found new method microvascular densiti assess rapid sclip correl excel semimanu measur microvascular densiti new method microvascular perfus assess tsica shown limit high cell densiti veloc sever imped applic method real sdf imag henc present valid method rapid fulli automat assess microvascular densiti sdf imag new method shown much faster convent semimanu method due current sdf imag hardwar limit abl automat detect microvascular perfus

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