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01-11-2016 | Original Article

Effect of the forward-projected model-based iterative reconstruction solution algorithm on image quality and radiation dose in pediatric cardiac computed tomography

Authors: Yukako Nishiyama, Keiji Tada, Yuichi Nishiyama, Hiroshi Mori, Mitsunari Maruyama, Takashi Katsube, Nobuko Yamamoto, Hidekazu Kanayama, Yasushi Yamamoto, Hajime Kitagaki

Published in: Pediatric Radiology | Issue 12/2016

Abstract

Background

Some iterative reconstruction algorithms are useful for reducing the radiation dose in pediatric cardiac CT. A new iterative reconstruction algorithm (forward-projected model-based iterative reconstruction solution) has been developed, but its usefulness for radiation dose reduction in pediatric cardiac CT is unknown.

Objective

To investigate the effect of the new algorithm on CT image quality and on radiation dose in pediatric cardiac CT.

Materials and methods

We obtained phantom data at six dose levels, as well as pediatric cardiac CT data, and reconstructed CT images using filtered back projection, adaptive iterative dose reduction 3-D (AIDR 3-D) and the new algorithm. We evaluated phantom image quality using physical assessment. Four radiologists performed visual evaluation of cardiac CT image quality.

Results

In the phantom study, the new algorithm effectively suppressed noise in the low-dose range and moderately generated modulation transfer function, yielding a higher signal-to-noise ratio compared with filtered back projection or AIDR 3-D. When clinical cardiac CT was performed, images obtained by the new method had less perceived image noise and better tissue contrast at similar resolution compared with AIDR 3-D images.

Conclusion

The new algorithm reduced image noise at moderate resolution in low-dose CT scans and improved the perceived quality of cardiac CT images to some extent. This new algorithm might be superior to AIDR 3-D for radiation dose reduction in pediatric cardiac CT.

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Title: Effect of the forward-projected model-based iterative reconstruction solution algorithm on image quality and radiation dose in pediatric cardiac computed tomography
Authors: Yukako Nishiyama
Keiji Tada
Yuichi Nishiyama
Hiroshi Mori
Mitsunari Maruyama
Takashi Katsube
Nobuko Yamamoto
Hidekazu Kanayama
Yasushi Yamamoto
Hajime Kitagaki
Publication date: 01-11-2016
Publisher: Springer Berlin Heidelberg
Published in: Pediatric Radiology / Issue 12/2016
Print ISSN: 0301-0449
Electronic ISSN: 1432-1998
DOI: https://doi.org/10.1007/s00247-016-3676-x

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Effect of the forward-projected model-based iterative reconstruction solution algorithm on image quality and radiation dose in pediatric cardiac computed tomography

Abstract

Background

Objective

Materials and methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Objective

Materials and methods

Results

Conclusion

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