What is the time range for the nephrographic phase of kidney contrast enhancement?

The nephrographic phase of kidney contrast enhancement typically occurs around 70 to 90 seconds after the administration of contrast material. During this phase, the kidneys demonstrate optimal enhancement because the contrast media has been sufficiently distributed within the renal parenchyma and is being actively excreted by the renal tubules.

This timing is crucial for obtaining accurate imaging of renal structures and detecting abnormalities such as tumors, hydronephrosis, or other renal pathologies. Imaging during the nephrographic phase allows for visualization of the renal cortex and medulla, providing valuable information for diagnosis.

Understanding the timing of this phase is essential for imaging protocols, as it ensures that the appropriate images are captured when the contrast media is at peak enhancement.