What is a Nephrogram test?

What is a Nephrogram test?

What is a Nephrogram? It is a diagnostic test performed in the nuclear medicine laboratory. A special radioactive drug, which has the property to be taken up and secreted by the kidneys, is administered intravenously (i.v.). Then, a special camera is placed behind the body at the height of the renal region.

What is Nephrogram kidney?

Striated nephrogram is a descriptive term indicating an appearance of alternating linear bands of high and low attenuation in a radial pattern extending through the corticomedullary layers of the kidney on iodine-based intravenous contrast enhanced imaging.

What is the Nephrogram phase?

The nephrogenic phase, also known as the nephrographic phase or the renal parenchymal phase, is a postcontrast injection time range in which there is an optimal enhancement of the renal parenchyma including the medulla.

What does delayed Nephrogram mean?

A delayed nephrogram, commonly described on plain film urography, but also visible on CT urography, is when there is absence or reduction of the normal renal parenchymal enhancement on the nephrographic phase images.

What causes striated Nephrogram?

Striated nephrograms may be unilateral or bilateral and are caused by ureteric obstruction, acute pyelonephritis, contusion, renal vein thrombosis, tubular obstruction, hypotension, and autosomal recessive polycystic kidney disease.

What is a delayed Nephrogram?

What causes bilateral hydronephrosis?

Causes. Bilateral hydronephrosis occurs when urine is unable to drain from the kidney into the bladder. Hydronephrosis is not itself a disease. It occurs as a result of a problem that prevents urine from draining out of the kidneys, ureters, and bladder.

What is an enlarged kidney called?

Hydronephrosis is swelling of one or both kidneys. Kidney swelling happens when urine can’t drain from a kidney and builds up in the kidney as a result. This can occur from a blockage in the tubes that drain urine from the kidneys (ureters) or from an anatomical defect that doesn’t allow urine to drain properly.

Can you see pyelonephritis on CT scan?

CT is the modality of choice for evaluating patients with emphysematous pyelonephritis. The type of emphysematous pyelonephritis can be easily and accurately defined on the basis of CT findings (,31).