Figure 2
From: Unraveling the Geometry Dependence of In-Nozzle Cavitation in High-Pressure Injectors

Projected fuel mass density along the direction of the x-ray beam (measured by the time-resolved radiography) and the reconstructed 3D fuel density distribution at 0.2 mm, 1.0 mm and 3.0 mm based on the single projection data.
(a–c) are for the R-type nozzle and (d–f) are for the S-type nozzle.