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  2. Renal ultrasonography - Wikipedia

    en.wikipedia.org/wiki/Renal_ultrasonography

    Renal ultrasound (US) is a common examination, which has been performed for decades. Using B-mode imaging, assessment of renal anatomy is easily performed, and US is often used as image guidance for renal interventions. Furthermore, novel applications in renal US have been introduced with contrast-enhanced ultrasound (CEUS), elastography and ...

  3. Hydronephrosis - Wikipedia

    en.wikipedia.org/wiki/Hydronephrosis

    For incidentally detected prenatal hydronephrosis, the first study to obtain is a postnatal renal ultrasound, since as noted, many cases of prenatal hydronephrosis resolve spontaneously. This is generally done within the first few days after birth, although there is some risk that obtaining an imaging study this early may miss some cases of ...

  4. Bladder outlet obstruction - Wikipedia

    en.wikipedia.org/wiki/Bladder_outlet_obstruction

    It is the most common cause of hydronephrosis detected in utero and is the most common anomaly detected on prenatal ultrasounds. [ 1 ] [ 2 ] It occurs in approximately 1 in every 1500 live births, is most commonly seen in males, involves the left ureter twice as often as the right ureter.

  5. Renal pelvis - Wikipedia

    en.wikipedia.org/wiki/Renal_pelvis

    The size of the renal pelvis plays a major role in the grading of hydronephrosis. Normally, the anteroposterior diameter of the renal pelvis is less than 4 mm in fetuses up to 32 weeks of gestational age and 7 mm afterwards. [2] In adults, 13% of the normal population have a transverse pelvic diameter of over 10 mm. [3]

  6. Urinary tract ultrasound - Wikipedia

    en.wikipedia.org/wiki/Urinary_tract_ultrasound

    Ultrasound involves a probe that is placed near a structure and uses the transmission of ultrasound waves through a structure to produce images, after computer processing. [1] Ultrasound of the urinary tract is performed by a probe placed on the abdominal wall, called a transducer. [1] This occurs while a person is lying down. [1]

  7. Posterior urethral valve - Wikipedia

    en.wikipedia.org/wiki/Posterior_urethral_valve

    Abdominal ultrasound is of some benefit, but not diagnostic. Features that suggest posterior urethral valves are bilateral hydronephrosis, a thickened bladder wall with thickened smooth muscle trabeculations, and bladder diverticula. [citation needed] Voiding cystourethrogram (VCUG) is more specific for the diagnosis.

  8. Kidney stone disease - Wikipedia

    en.wikipedia.org/wiki/Kidney_stone_disease

    Renal ultrasonography can sometimes be useful, because it gives details about the presence of hydronephrosis, suggesting that the stone is blocking the outflow of urine. [59] Radiolucent stones, which do not appear on KUB, may show up on ultrasound imaging studies.

  9. Neurogenic bladder dysfunction - Wikipedia

    en.wikipedia.org/wiki/Neurogenic_bladder_dysfunction

    Trabeculated bladder on ultrasound indicates high risk of developing urinary tract abnormalities such as hydronephrosis and stones. [10] A voiding cystourethrography study uses contrast dye to obtain images of the bladder both when it is full and after urination which can show changes in bladder shape consistent with neurogenic bladder. [9]