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Published in: Japanese Journal of Radiology 4/2018

01-04-2018 | Original Article

Utility of second-generation single-energy metal artifact reduction in helical lung computed tomography for patients with pulmonary arteriovenous malformation after coil embolization

Authors: Yudai Asano, Akihiro Tada, Takayoshi Shinya, Yoshihisa Masaoka, Toshihiro Iguchi, Shuhei Sato, Susumu Kanazawa

Published in: Japanese Journal of Radiology | Issue 4/2018

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Abstract

Purpose

The quality of images acquired using single-energy metal artifact reduction (SEMAR) on helical lung computed tomography (CT) in patients with pulmonary arteriovenous malformation (PAVM) after coil embolization was retrospectively evaluated.

Materials and methods

CT images were reconstructed with and without SEMAR. Twenty-seven lesions [20 patients (2 males, 18 females), mean age 61.2 ± 11.0 years; number of embolization coils, 9.8 ± 5.0] on contrast-enhanced CT and 18 lesions of non-enhanced lung CT concurrently performed were evaluated. Regions of interest were positioned around the coils and mean standard deviation value was compared as noise index. Two radiologists visually evaluated metallic coil artifacts using a four-point scale: 4 = minimal; 3 = mild; 2 = strong; 1 = extensive.

Results

Noise index was significantly improved with SEMAR versus without SEMAR (median [interquartile range]; 194.4 [161.6–211.9] Hounsfield units [HU] vs. 243.9 [220.4–286.0] HU; p < 0.001). Visual score was significantly improved with SEMAR versus without SEMAR (Reader 1, 3 [3] vs.1 [1]; Reader 2, 3 [3] vs.1 [1]; p < 0.001). Significant differences were similarly demonstrated on lung CT (p < 0.001).

Conclusion

SEMAR provided clear chest CT images in patients who underwent PAVM coil embolization.
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Metadata
Title
Utility of second-generation single-energy metal artifact reduction in helical lung computed tomography for patients with pulmonary arteriovenous malformation after coil embolization
Authors
Yudai Asano
Akihiro Tada
Takayoshi Shinya
Yoshihisa Masaoka
Toshihiro Iguchi
Shuhei Sato
Susumu Kanazawa
Publication date
01-04-2018
Publisher
Springer Japan
Published in
Japanese Journal of Radiology / Issue 4/2018
Print ISSN: 1867-1071
Electronic ISSN: 1867-108X
DOI
https://doi.org/10.1007/s11604-018-0723-6

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