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High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals

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Partial ring artifact on cardiac CT: image presentation and clinical implication.

Hsin-Yu Tsai¹, Min-Chi Chen, I-Chen Tsai

¹Department of Radiology, Taichung Veterans General Hospital, No. 160, Sec. 3, Taichung Harbor Road, Taichung 407, Taiwan. hsinyu0321@gmail.com

The International Journal of Cardiovascular Imaging

|April 20, 2011

Summary

This summary is machine-generated.

A partial ring artifact in cardiac CT, caused by a broken detector, presents a unique pattern. Reviewing images across different cardiac cycles can prevent unnecessary scans and radiation exposure.

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Area of Science:

Medical Imaging
Radiology
Computed Tomography

Background:

Computed tomography (CT) artifacts are discrepancies between image CT numbers and true attenuation coefficients.
Ring artifacts are a known issue in CT imaging.
Cardiac CT requires high image quality for accurate diagnosis.

Observation:

A novel partial ring artifact pattern was observed in a clinical cardiac CT scan.
This artifact was specifically linked to a malfunctioning detector module.
The artifact's unique presentation differs from typical ring artifacts in routine CT.

Findings:

Demonstration of cardiac CT images and animations exhibiting the partial ring artifact.
Analysis of the artifact's distinct characteristics in cardiac versus routine CT.
Identification of the broken detector module as the root cause.

Implications:

Understanding this artifact is crucial for accurate clinical interpretation of cardiac CT.
Suggests reviewing images from different cardiac phases (RR-intervals) to assess artifact impact.
Proposes a method to avoid unnecessary repeat scans and reduce patient radiation exposure.