The following table or figure may be downloaded to PowerPoint for personal use in teaching and presentations. This feature is available to all subscribers to the journal.

You MUST read and follow the guidelines at Request to Reproduce AJR Content if you are distributing or using AJR content beyond academic use (limited distribution, non-revenue producing, or educational purposes).

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 10B. —Contrast medium concentrations as results of three-compartment model calculations and CT measurements in patient with markedly swollen kidneys (shown in Figs. 8A, 8B) caused by bilateral pyelonephritis with hydronephrosis and treated with percutaneous nephrostomy on left side. Patient had low glomerular filtration rate (GFR). Interstitial space was calculated to be 46%. Parameters are more fully defined in Appendix 1. Graph shows contrast medium amount in vascular space, B(t) (); in interstitial space, I(t) (); and excreted into nephron as result of model calculations and CT measurements. Amount of contrast medium in interstitial space is much greater than amount excreted into nephron. Most contrast medium measured with CT (K_CT) represents contrast medium in interstitial space. Calculated Patlak plot [3] is curved line with slope that is initially steep and later flattens. • = amount of contrast medium in nephron, N(t); = amount of contrast medium in kidney, K(t); = contrast medium measured with CT (K_CT).