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. 2021 Apr 1;94(1120):20200754.
doi: 10.1259/bjr.20200754. Epub 2021 Feb 5.

First experience of efficacy and radiation exposure in 320-detector row CT fluoroscopy-guided interventions

Shota Yamamoto  1 , Tomohiro Matsumoto  1 , Satoshi Suda  1 , Kosuke Tomita  1 , Shunsuke Kamei  1 , Kazunobu Hashida  1 , Yutaka Imai  1 , Kazuyuki Endo  2 , Katsuki Murakami  2 , Terumitsu Hasebe  1
Affiliations

First experience of efficacy and radiation exposure in 320-detector row CT fluoroscopy-guided interventions

Shota Yamamoto et al. Br J Radiol. .

Abstract

Objective: We investigated the efficacy and exposure to radiation in 320-detector row computed tomography fluoroscopy-guided (CTF-guided) interventions.

Methods: We analysed 231 320-detector row CTF-guided interventions (207 patients over 2 years and 6 months) in terms of technical success rates, clinical success rates, complications, scanner settings, overall radiation doses (dose-length product, mGy*cm), patient doses of peri-interventional CT series, and interventional CT (including CTF), as a retrospective cohort study. The relationships between patient radiation dose and interventional factors were assessed using multivariate analysis.

Results: Overall technical success rate was 98.7% (228/231). The technical success rates of biopsies, drainages, and aspirations were 98.7% (154/156), 98.5% (66/67), and 100% (8/8), respectively. The clinical success rate of biopsies was 93.5% (146/156). All three major complications occurred in chest biopsies. The median total radiation dose was 522.4 (393.4-819.8) mGy*cm. Of the total radiation dose, 87% was applied during the pre- and post-interventional CT series. Post-interventional CT accounted for 24.4% of the total radiation dose. Only 11.4% of the dose was applied by CTF-guided intervention. Multilinear regression demonstrated that male sex, body mass index, drainage, intervention time, and helical scan as post-interventional CT were significantly associated with higher dose.

Conclusion: The 320-detector row CTF interventions achieved a high success rate. Dose reduction in post-interventional CT provides patient dose reduction without decreasing the technical success rates.

Advances in knowledge: This is the first study on the relationship between various interventional outcomes and patient exposure to radiation in 320-detector row CTF-guided interventions, suggesting a new perspective on dose reduction.

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Conflict of interest statement

Conflict of Interest: On behalf of all authors, the corresponding author states that there is no conflict of interest.

Figures

Figure 1.
Figure 1.
Study population
Figure 2.
Figure 2.
320-detector row CTF-guided intervention workflow. CTF, computed tomography fluoroscopy
See this image and copyright information in PMC

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