Kidney Stone Ultrasound Twinkle. Unfortunately this is a rare occurrence since most kidney stones lie in the ureter or the ureterovesical junction. It occurs as a focus of alternating colors on doppler signal behind a reflective object such as a calculus which gives the appearance of turbulent blood flow 2 it appears with or without an associated color comet tail artifact 3.
A between the two signs of related to the kidney stone in ultrasound. If present it then counts the number of calculi in each kidney and measures the largest on each side. Ripollés et al also observed that 16 of the 76 stones were found to have either no findings on standard b mode or twinkling artifact was the first noticed finding before being scrutinized again via b.
Figure a shows transverse view of the kidney with two stones appearing as echogenic foci accompanied by shadowing arrows.
Illustration of the twinkling artifact shown in a and b are ultrasound images of a 2 mm stone inserted into an in vivo kidney. The most definitive way to see a kidney stone on ultrasound is by direct visualization. The underlying mechanism of this artifact is thought to be a result of inherent noise within the. Unfortunately this is a rare occurrence since most kidney stones lie in the ureter or the ureterovesical junction.