Artifacts Caused by Breast Tissue Markers in a Dedicated Cone-beam Breast CT in Comparison to Full-field Digital Mammography
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Artifacts Caused by Breast Tissue Markers in a Dedicated Cone-beam Breast CT in Comparison to Full-field Digital Mammography. / Wienbeck, Susanne; Nowak, Carsten; Zapf, Antonia; Stamm, Georg; Unterberg-Buchwald, Christina; Lotz, Joachim; Fischer, Uwe.
In: ACAD RADIOL, Vol. 24, No. 7, 07.2017, p. 908-915.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Artifacts Caused by Breast Tissue Markers in a Dedicated Cone-beam Breast CT in Comparison to Full-field Digital Mammography
AU - Wienbeck, Susanne
AU - Nowak, Carsten
AU - Zapf, Antonia
AU - Stamm, Georg
AU - Unterberg-Buchwald, Christina
AU - Lotz, Joachim
AU - Fischer, Uwe
N1 - Copyright © 2017 The Association of University Radiologists. Published by Elsevier Inc. All rights reserved.
PY - 2017/7
Y1 - 2017/7
N2 - RATIONALE AND OBJECTIVES: The purpose of this ex vivo study was to investigate artifacts in a cone-beam breast computed tomography (CBBCT) caused by breast tissue markers.MATERIALS AND METHODS: Breast phantoms with self-made tissue pork mincemeat were created. Twenty-nine different, commercially available markers with varying marker size, composition, and shape were evaluated. A dedicated CBBCT evaluation of all phantoms was performed with 49 kVp, 50 and 100 mA, and marker orientation parallel and orthogonal to the scan direction. The resultant images were evaluated in sagittal, axial, and coronal view with a slice thickness of 0.5 mm. Additionally, measurements of all markers in the same directions were done with full-field digital mammography.RESULTS: All markers were visible in full-field digital mammography without any artifacts. However, all markers caused artifacts on a CBBCT. Artifacts were measured as the length of the resulting streakings. Median length of artifacts was 7.2 mm with a wide range from 0 to 48.3 mm (interquartile range 4.3-11.4 mm) dependent on composition, size, shape, weight, and orientation of the markers. The largest artifacts occurred in axial view with a median size of 12.6 mm, with a range from 0 to 48.3 mm, resulting in a relative artifact length (quotient artifact in mm/real physical length of the marker itself) of 4.1 (interquartile range 2.3-6.1, range 0-8.7).CONCLUSIONS: Artifacts caused by markers can significantly influence image quality in a CBBCT, thus limiting primary diagnostics and follow-up in breast cancer. The size of the artifacts depends on the marker characteristics, orientation, and the image plane of reconstruction.
AB - RATIONALE AND OBJECTIVES: The purpose of this ex vivo study was to investigate artifacts in a cone-beam breast computed tomography (CBBCT) caused by breast tissue markers.MATERIALS AND METHODS: Breast phantoms with self-made tissue pork mincemeat were created. Twenty-nine different, commercially available markers with varying marker size, composition, and shape were evaluated. A dedicated CBBCT evaluation of all phantoms was performed with 49 kVp, 50 and 100 mA, and marker orientation parallel and orthogonal to the scan direction. The resultant images were evaluated in sagittal, axial, and coronal view with a slice thickness of 0.5 mm. Additionally, measurements of all markers in the same directions were done with full-field digital mammography.RESULTS: All markers were visible in full-field digital mammography without any artifacts. However, all markers caused artifacts on a CBBCT. Artifacts were measured as the length of the resulting streakings. Median length of artifacts was 7.2 mm with a wide range from 0 to 48.3 mm (interquartile range 4.3-11.4 mm) dependent on composition, size, shape, weight, and orientation of the markers. The largest artifacts occurred in axial view with a median size of 12.6 mm, with a range from 0 to 48.3 mm, resulting in a relative artifact length (quotient artifact in mm/real physical length of the marker itself) of 4.1 (interquartile range 2.3-6.1, range 0-8.7).CONCLUSIONS: Artifacts caused by markers can significantly influence image quality in a CBBCT, thus limiting primary diagnostics and follow-up in breast cancer. The size of the artifacts depends on the marker characteristics, orientation, and the image plane of reconstruction.
KW - Artifacts
KW - Cone-Beam Computed Tomography
KW - Fiducial Markers
KW - Mammography
KW - Phantoms, Imaging
KW - Red Meat
KW - Reproducibility of Results
KW - Comparative Study
KW - Journal Article
U2 - 10.1016/j.acra.2016.11.017
DO - 10.1016/j.acra.2016.11.017
M3 - SCORING: Journal article
C2 - 28130048
VL - 24
SP - 908
EP - 915
JO - ACAD RADIOL
JF - ACAD RADIOL
SN - 1076-6332
IS - 7
ER -
