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Updated: May 13, 2026
11:09
High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals
Published on: December 16, 2022
Temporal resolution and motion artifacts in single-source and dual-source cardiac CT.
Harald Schöndube1, Thomas Allmendinger, Karl Stierstorfer
1Siemens AG, Healthcare Sector, Computed Tomography, 91301 Forchheim, Germany. harald.schoendube@siemens.com
Medical Physics
|March 8, 2013
Summary
Assessing temporal resolution in cardiac CT using data amount is extendable to dual-source CT. However, advanced iterative reconstruction methods require new measures for accurate performance comparison.
Area of Science:
- Medical Imaging
- Radiology
- Computed Tomography
Background:
- Temporal resolution in cardiac CT is traditionally linked to the volume of data used for image reconstruction.
- Existing measures include full width at half maximum (FWHM-TR) and total width (total TR) of the data weighting function.
Purpose of the Study:
- To evaluate the applicability of current temporal resolution assessment methods to dual-source CT (DSCT).
- To investigate the effectiveness of these measures with advanced iterative reconstruction algorithms.
Main Methods:
- Reviewed temporal resolution in single-source CT, defining FWHM-TR and total TR.
- Extended temporal resolution assessment theory to DSCT.
- Compared three advanced iterative reconstruction methods based on motion artifact levels using identical input data.
Main Results:
- The total TR concept is directly applicable to DSCT; FWHM-TR requires slight modification.
- Iterative reconstruction methods produced images with varying motion artifact levels despite using the same data.
Conclusions:
- Temporal resolution assessment methods can be extended from single-source to DSCT.
- Current assessment approaches are insufficient for advanced iterative reconstruction algorithms.
- New methods are needed to accurately evaluate temporal resolution with advanced CT reconstruction techniques.
