Figure 8a. Three-dimensional volume-rendered images from renal CT angiography with a 16-channel scanner. The first row of data on the images is the detector configuration, the middle row is the volume CT dose index, and the bottom row is the scanning time. (a) Image reconstructed from anisotropic data provides satisfactory depiction of the aorta and central vessels. (b) Image reconstructed from isotropic data provides slightly improved definition of smaller vessels. The automated "seed and grow" software program used to create these images provided better depiction of peripheral branches of the renal vessels with the use of isotropic data.