What is number one describing?

How does spatial compounding (e.g., SonoCT, CrossXBeam) typically affect the appearance of acoustic shadowing distal to a kidney stone?

A 5-year-old female presents with recurrent urinary tract infections (UTIs). A bladder ultrasound reveals bilateral anechoic, cystic ballooning structures projecting into the bladder lumen at the vesicoureteral junctions (VUJs), which dynamically inflate and deflate. When evaluating with color Doppler, symmetrical bursts of color (ureteral jets) are clearly observed emerging from both cystic structures into the main bladder lumen. 

What is the question mark? HagenTextbook

What are the head arrows pointing to?

To optimize the visualization of the twinkling artifact behind a suspected kidney stone, which of the following Color Doppler parameter changes is most appropriate?

Because angiomyolipomas are composed of a significant amount of macroscopic ——, they typically appear brightly hyperechoic.

The ——– are in the renal parenchyma and consist of two main structures: a renal corpuscle and a renal tubule.

 —- shadowing is generally associated with smooth, round, cystic structures.

A patient with nephrotic syndrome presents with sudden-onset flank pain, hematuria, and an enlarged kidney. On ultrasound, intrarenal venous flow is absent, and the main renal vein shows no color or spectral Doppler signals. Which of the following best describes the expected arterial waveform in this condition?