Dual Energy CT Imaging Function Flashcards
Dual Energy CT Imaging general function
Dual-energy computed tomography
Basis Materials
Dual-energy bone removal
Effective atomic number (Zeff):
Electron density images:
Iodine map
Mixed or blended images
Mono-E curves
Virtual mono-energetic
Virtual non-calciumVirtual non-contrast
Dedicated CT
imaging technology acquiring two data sets from two distinct
photon energy levels with a minimal time interval.
Dual-energy computed tomography
At a given energy, materials have unique
photoelectric and Compton effects. Such materials, known
as basis materials, must have sufficiently different
attenuation characteristics to be used for material
decomposition
Basis Materials
a dual-energy CT application to
remove bony structures in angiography dual-energy CT
images for vascular structure enhancement
Dual-energy bone removal
description of the
average atomic number for a heterogenous material
Effective atomic number (Zeff):
CT images representing the
density of the material electrons. Its value usually is
normalized to water electron density
Electron density images
Multi-energy CT material selective images of
iodine equivalent materials with water equivalent materials
removed.
Iodine map
Blend the low and the high
energy image sets into one new image set.
Mixed or blended images
A plot of a curve representing the variation
of CT number of an ROI across multiple monoenergetic
energies
Mono-E curves:
Synthetic images mimicking the
appearance of images from a true mono-energetic photon
source. These images are generated from the energyindependent information available during material
decomposition
Virtual mono-energetic:
Multi-energy CT material selective
images with calcium equivalent materials removed. It is
usually used to visualize bone marrow
Virtual non-calcium
Material selective images with the
contrast (iodine) removed. Soft-tissue, fat and iodine are the
base materials.
Virtual non-contrast:
