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Japanese Journal of Radiology
Published in: Japanese Journal of Radiology 9/2016

01-09-2016 | Original Article

Reduction of misregistration on cerebral four-dimensional computed tomography angiography images using advanced patient motion correction reconstruction

Authors: Yuki Kunitomi, Yoshiyuki Watanabe, Atsuko Arisawa, Akio Tsukabe, Hisashi Tanaka, Hiroto Takahashi, Takeo Nishida, Manabu Kinoshita, Hajime Nakamura, Noriyuki Tomiyama

Published in: Japanese Journal of Radiology | Issue 9/2016

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Abstract

Purpose

The aim of this study was to evaluate whether advanced patient motion correction (APMC) can reduce the misregistration of pixels between the different X-ray tube positions in four-dimensional CT angiography (4D-CTA).

Materials and methods

Eight patients with intracranial aneurysms were included in this retrospective study. We compared the CTA images with APMC reconstruction and half-scan reconstruction with regard to the following 3 items: (1) bone misalignment area; (2) image noise; and (3) aneurysm volume change.

Results

The bone misalignment area and image noise were significantly reduced in the APMC images, as compared to that in the half-scan reconstruction images (bone misalignment area: 33.0 ± 18.1 cm3 vs 152.0 ± 72.2 cm3, respectively; p < 0.001) (image noise at pons: 9.70 ± 2.58 vs 15.16 ± 5.02, respectively, p < 0.001). The aneurysm volume and volume variance were significantly smaller in the APMC reconstruction than those in the half-scan reconstruction (volume: 1107.2 ± 1813.8 mm3 vs 1135.1 ± 1853.8 mm3; p < 0.05; coefficient of variation: 0.0291 ± 0.014 vs 0.0463 ± 0.026, p < 0.05, respectively).

Conclusion

Our results show that APMC reduces the reconstruction related misregistration between the cardiac phases compared to half-scan reconstruction.
Appendix
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Metadata
Title
Reduction of misregistration on cerebral four-dimensional computed tomography angiography images using advanced patient motion correction reconstruction
Authors
Yuki Kunitomi
Yoshiyuki Watanabe
Atsuko Arisawa
Akio Tsukabe
Hisashi Tanaka
Hiroto Takahashi
Takeo Nishida
Manabu Kinoshita
Hajime Nakamura
Noriyuki Tomiyama
Publication date
01-09-2016
Publisher
Springer Japan
Published in
Japanese Journal of Radiology / Issue 9/2016
Print ISSN: 1867-1071
Electronic ISSN: 1867-108X
DOI
https://doi.org/10.1007/s11604-016-0563-1

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