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Three-Dimensional Printing of a Complex Aortic Anomaly

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Task-based selection of three-dimensional rotational angiography imaging modes using in-house phantom.

L E Lubis¹, R A Basith², I Hariyati³

¹Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Kampus UI Depok 16424, Indonesia; Radiology Unit, Universitas Indonesia Hospital, Kampus UI Depok 16424, Indonesia.

Radiography (London, England : 1995)

|April 11, 2024

Summary

The "head limited" mode in three-dimensional rotational angiography (3DRA) is recommended for cranial procedures. It offers a balance of lower radiation dose and sufficient image quality for contrast-enhanced imaging.

Keywords:

3DRA Dose Image quality In-house phantom Optimization

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Area of Science:

Medical Imaging
Radiology
Diagnostic Imaging

Background:

Clinicians and radiographers face challenges selecting appropriate three-dimensional rotational angiography (3DRA) modes for cranial applications due to similar protocol names.
Ambiguity in 'cerebral' and 'head limited' 3DRA modes complicates optimal use.

Purpose of the Study:

To evaluate and recommend the optimal mode selection for cranial 3DRA procedures.
To address clinical difficulties in choosing between 'cerebral' and 'head limited' 3DRA modes.

Main Methods:

An in-house phantom simulating cranial vessels with varying iodinated contrast agent concentrations was utilized.
Image quality was assessed using signal difference to noise ratio (SDNR), and radiation dose was measured via Kerma-area product (KAP).
X-ray spectrum analysis provided quantitative evaluation.

Main Results:

The 'head limited' mode is suggested for clinical use.
The 'low' detail option within 'head limited' mode yields the lowest KAP and slightly superior SDNR compared to the 'normal' detail option.
A minimum iodine concentration of 18.5 mg/ml is needed with the 'low' detail option for comparable SDNR.

Conclusions:

The 'head limited' mode with 'low' detail settings is advisable for contrast-enhanced 3DRA procedures.
Collaboration between clinicians, physicists, and manufacturers is crucial for standardized 3DRA mode selection.
Objective dose and image quality metrics reduce subjectivity in 3DRA mode selection.