Color and Power Doppler Twinkling Artifacts from Urinary Stones

Abstract

Color Doppler twinkling artifacts from urinary stones occur frequently and may be considered an additional sonographic feature of urinary stones. The observation of these artifacts may be helpful in determining the presence of urinary stones.

Value of color doppler ultrasound, kub and urinalysis in diagnosis of renal colic due to ureteral stones

“…The twinkling generation was not related to ureteral dilatation or hydronephrosis. Lee et al have reported the same conclusion (19).…”

“…Similarly, Lee et al reported that 4 of 20 renal stones and 2 of 16 ureteral stones did not show any twinkling sign. The authors suggested that ureteral stones may be influenced more than renal stones by ultrasonic attenuation of interposed tissues because the ureter is deeply seated below abundant fatty tissue without a proper acoustic window (19). Others suggested reservation of CT for those patients who first have negative or equivocal results for KUB and sonography and this notion was applied in some of our cases (20).…”

Sonographic Twinkling Artifact in a Renal Graft With Prolene Mesh

“…Since its initial description, the twinkling artifact has been reported mainly in parenchymal calcifications, including renal and bladder calculi. [6][7][8] It has also been described with indwelling ureteral stents, 9 in gallbladder adenomyomatosis, 10 and in the central nervous system with aneurysm coils. 11 An experimental study by Kamaya et al 12 showed the twinkling artifact behind Struvite stone fragments and wire mesh scanned in a water bath.…”

The usefulness of agent emission imaging - high mechanical index ultrasound mode in the diagnosis of urolithiasis: a prospective preliminary study

“…tinal gas superposition, small calculi without posterior acoustic enhancement, and the echogenic fatty tissue of renal sinus (4,5). These factors have led researchers and device manufacturers to develop novel modalities and techniques to aid in the diagnostic process.…”

“…These factors have led researchers and device manufacturers to develop novel modalities and techniques to aid in the diagnostic process. If additional ultrasonographic signs associated with urinary calculi could be identified, the diagnostic sensitivity of this modality could be increased (4,5).…”