Gebelikte venöz akımda blooming artefaktının değerlendirilmesi için üç farklı renkli doppler tekniğinin karşılaştırılması

Abstract

Aim: Blooming is one of the color doppler artefacts which has unique importance for the tiny or slow-flow blood vessels of the fetus and is different and varies depending on the technique. The purpose of our study is to compare doppler techniques related to the flowering artefact so that the imaging method closest to the actual size of small vessels can be selected. Method: Twin-view mode was used for measurements in 100 patients, referred to our department for obstetric ultrasonography. The diameter of the intrahepatic umbilical vein was measured from the inner to the inner side of the vessels in both B mode side and each colorized lateral side of the vessels with all of the Doppler modes. Results: Diameters of the vessels measured by advanced dynamic flow were less than the ones measured by conventional color doppler and power doppler. Conclusion: Lowering the doppler gain will decrease the blooming artefact. However, this can cause flow information to be lost. Inversely, raising the gain will result overestimating the vessel diameter or over colorizing the tissue or mass with regard to vascularity. Vascular colorize is crucial for correct placement of PD sampling gate, which could be particularly useful in the small vessels of the fetus. ADF provides more accurate measurements of the diameters of the vessels due to less blooming. Because of that, we consider that ADF is a superior Doppler technique compared with CCD and PWD, for identifying a vessel and guiding the PD sample volume.