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

01-09-2016 | Original Article

Single-energy metal artifact reduction for helical computed tomography of the pelvis in patients with metal hip prostheses

Authors: Koichiro Yasaka, Eriko Maeda, Shouhei Hanaoka, Masaki Katsura, Jiro Sato, Kuni Ohtomo

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

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Abstract

Purpose

To compare the quality of helical computed tomography (CT) images of the pelvis in patients with metal hip prostheses reconstructed using adaptive iterative dose reduction (AIDR) and AIDR with single-energy metal artifact reduction (SEMAR-A).

Materials and methods

This retrospective study included 28 patients (mean age, 64.6 ± 11.4 years; 6 men and 22 women). CT images were reconstructed using AIDR and SEMAR-A. Two radiologists evaluated the extent of metal artifacts and the depiction of structures in the pelvic region and looked for mass lesions. A radiologist placed a region of interest within the bladder and recorded CT attenuation.

Results

The metal artifacts were significantly reduced in SEMAR-A as compared to AIDR (p < 0.0001). The depictions of the bladder, ureter, prostate/uterus, rectum, and pelvic sidewall were significantly better with SEMAR-A than with AIDR (p < 0.02). All lesions were diagnosed with SEMAR-A, while some were not diagnosed with AIDR. The median and interquartile range (in parentheses) of CT attenuation within the bladder for AIDR were −34.0 (−46.6 to −15.0) Hounsfield units (HU) and were more variable than those seen for SEMAR-A [5.4 (−1.3 to 11.1)] HU (p = 0.033).

Conclusion

In comparison with AIDR, SEMAR-A provided pelvic CT images of significantly better quality for patients with metal hip prostheses.
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Metadata
Title
Single-energy metal artifact reduction for helical computed tomography of the pelvis in patients with metal hip prostheses
Authors
Koichiro Yasaka
Eriko Maeda
Shouhei Hanaoka
Masaki Katsura
Jiro Sato
Kuni Ohtomo
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/s11604-016-0566-y

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