Keywords : acute kidney injury, AKI, artifact, caliectasis, chronic kidney disease, CKD, color Doppler, genitourinary ultrasound, hydronephrosis, kidney stone, medulla, pelviectasis, peristalsis, renal calculi, renal cortex, renal ultrasound, Renal, resistive index, RI, spectral Doppler, Stone, tardus parvus waveform, Twinkling, UPJ, ureteral jets, Ureteral, ureteropelvic junction, ureterovesical junction, urinary bladder cancer, urinary bladder stones, urinary bladder, UVJ