Radiation Dose Reduction in Computed Tomography Guided Lung Interventions Using an Iterative Reconstruction Technique

Lung imaging

Rofo. 2015 Oct;187(10):906-14.

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Authors:

DH. Chang, S. Hiss, D. Mueller, M. Hellmich, J. Borggrefe, AC Bunck, D. Maintz, M. Hackenbroch

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Summary

The study assessed a low-dose CT (LDCT) protocol with iterative reconstruction (iDose5) in 130 patients undergoing lung biopsies or marker placements.

Key outcomes:

• Radiation Reduction: LDCT achieved a 68.6% dose reduction (effective dose: 0.66 mSv vs. 2.11 mSv, p < 0.001) compared to standard-dose CT.
• Image Quality: Iterative reconstruction improved contrast-to-noise ratio by 73% (p < 0.001) without compromising diagnostic acceptability or procedural precision.
• Safety: Both protocols had equivalent success (97–98%) and complication rates (e.g., pneumothorax).

LDCT with iterative reconstruction enables safer interventions while adhering to ALARA principles.

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