Novel spatial-temporal image correlation derived indices of tissue vascular impedance: A variability study.

ABSTRACT:

Objectives

4D (3D + time) indices of tissue impedance using power Doppler (PD) ultrasound (US) can be measured with spatial-temporal image correlation (STIC) imaging. We wished to evaluate their repeatability and their influence under changes to US machine settings and regional differences within the placenta.

Methods

A total of 46 healthy women were recruited at 20-34 weeks of gestation. A total of 9940 3D frames from 644 4D data sets were analysed providing both 3D and 4D indices of vascularity. 4D vs. 3D indices were compared with different machine settings, across the cardiac cycle and in the different placenta regions to assess regional variability.

Results

3D and 4D indices significantly decreased as wall motion filter (WMF) was increased (P < 0.001). Repeatabil

SUBMITTER: Wu L 

PROVIDER: S-EPMC8409850 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature