The correlation between the US calcium volume and CT calcium volume.

<p>The correlation between the calcium volume measured with CT and ultrasound, for different amounts of calcium (2-50mg). There is a significant correlation between the two techniques with R² = 0.7392, p<0.0001.</p

Schematic overview of the position of phantom and ultrasound probe during ultrasound image acquisition.

<p>Schematic overview of the position of phantom and ultrasound probe during ultrasound image acquisition. Left. Position to obtain long axis images. The long axis of the probe (LA probe) is parallel to the long axis of the calcium (LA calcium). The phantom moves in direction along the short axis of the probe (SA probe). A = agar phantom with 5 increasing amounts of calcium, B = ultrasound probe mounted on support stand. Right. Position to obtain short axis images. The long axis of the probe (LA probe) is perpendicular to the long axis of the calcium (LA calcium). The phantom moves in direction along the short axis of the probe (SA probe). A = agar phantom with 5 increasing amounts of calcium, B = ultrasound probe mounted on support stand.</p

Correlation of calcium amount with US calcium volume and CT calcium volume.

<p>(A) The correlation between the calcium amount and the US calcium volume. There is a significant correlation between the amount of calcium (2-50mg) and the US calcium volume, with R² = 0.8161, p<0.0001. (B) The correlation between the calcium amount and the CT calcium. There is a significant correlation between the amount of calcium (2-50mg) and the CT calcium volume, with R² = 0.9788, p<0.0001.</p