Partial volume effect on kidney stones and lung nodules in CT imaging.

ABSTRACT:

Rationale and objectives

To examine the impact of the partial volume effect (PVE) on the imaging of spherical objects depending on their size, density and center voxel position.

Materials and methods

We developed an algorithm for calculating the volume of a sphere wrapped by voxels. The algorithm measured the internal volume of each voxel cut by the sphere and automatically attributed the average voxel density. The sphere volume was simulated by the sum of voxels with an average density above the Hounsfield Unit (HU) cutoff level for that object. Various sphere sizes, densities and positions in the voxel grid were examined. The two clinical settings used were nodules (0 HU) in the lung (-1000 HU) and kidney stones (1000 HU) embedded in the renal parenchyma (30 HU).

Result

SUBMITTER: Christe A 

PROVIDER: S-EPMC12625779 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature