Renal calculi

A free gallery of high-resolution, ultrasound, color doppler and 3D images

Ultrasound images of renal calculi:

1) Renal calculus:

Kidney Stone:

This patient had pain in the right lumbar region. Sonography of the kidneys reveals an markedly echogenic lesion in the lower calyx of right kidney. An acoustic shadow is seen posterior to the lesion. These ultrasound images are diagnostic of a renal calculus (measuring 15 x 10 mm. in size) in the lower calyx. Absence of pelvicalyceal dilatation suggests that there is no obstruction to urinary flow. It is always useful to scan the renal calculus and kidney in two planes to get an accurate measurement in two axis. Ultrasound images taken using Pie Scanner 100 Falco, by Dr. Joe Antony, MD, Cochin, India.

3-D Ultrasound image of renal calculus:

This 3-D (3 dimensional) ultrasound image of the left kidney shows a renal calculus in the lower calyx (arrow). 3D sonography has better ability to demonstrate calculi and rule out other causes of echogenic lesions in the kidney. This ultrasound image is courtesy of Dr. Ravi Kadasne, UAE. Picture taken using Philips iU 22 ultrasound system.

2) Staghorn calculus:

Sonography of very large renal calculi:

This huge calculus was discovered on ultrasound imaging of the left kidney. The calculus measuring almost 7 cms. is seen occupying the lower half of the left renal pelvis and the adjacent calyces. There is also mild dilatation of the renal pelvis due to urinary tract obstruction. Color doppler imaging shows the typical twinkling artifact near the calculus. These images suggest a staghorn calculus. Staghorn calculi are also called struvite calculi or triple phosphate calculi. Images courtesy of Shlomo Gobi, Israel. He used an ATL Philips HDI 3000 machine for these ultrasound images.

Reference: http://www.emedicine.com/MED/topic2834.htm (free article and images)

Multiple renal calculi:

The above ultrasound images show multiple calculi in the left kidney. The calculi appear to be located in the renal calyces. X-ray of the abdomen shows the calculi in the left renal region, as radio-opacities. Sonography shows no pelvicalyceal dilation or hydronephrosis despite extensive urolithiasis or nephrolithiasis (stone formation) in left kidney. It is often not possible to be sure (on ultrasound) if these are separate calculi or part of a staghorn calculus. However, here the X-ray image confirms absence of staghorn calculus. Images courtesy of Gunjan Puri, MD, India.

3) Nephrocalcinosis:

Sonography of the kidneys in this patient reveal markedly echogenic (hyperechoic) renal pyramids with the central parts also affected. Ultrasound images also reveal renal calculus formation. These images suggest presence of medullary nephrocalcinosis.

Anderson-Carr kidney:

The above 3 ultrasound images reveal nephrocalcinosis with involvement of the rim of the pyramids, a variant called the Anderson-Carr kidneys. The central part of the pyramids is relatively hypoechoic. All images above courtesy of Shlomo Gobi, Israel. Machine used here is the ATL-Philips HDI 3000.

Reference: http://www.emedicine.com/Radio/topic470.htm (free article and images).

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This page was last edited on: Thursday December 17, 2009 02:46 PM

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