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, Gilbert G.; Unterberg‐Buchwald, Christina; Lotz, Joachim; Fischer, Uwe

doi:10.1016/j.acra.2016.11.017

Cited by 6 publications

(5 citation statements)

References 24 publications

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“…Our study demonstrates that artifact size was dependent on the type of marker and its size. These results are consistent with a study by Wienbeck et al [37]. In an ex vivo study in a cone-beam breast CT, they found out that artifact size was also dependent on marker size in their study.…”

Section: Discussionsupporting

confidence: 93%

Feasibility of In Vivo Metal Artifact Reduction in Contrast-Enhanced Dedicated Spiral Breast Computed Tomography

Wetzl,

Wenkel,

Steiding

et al. 2023

Diagnostics

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Background: Radiopaque breast markers cause artifacts in dedicated spiral breast-computed tomography (SBCT). This study investigates the extent of artifacts in different marker types and the feasibility of reducing artifacts through a metal artifact reduction (MAR) algorithm. Methods: The pilot study included 18 women who underwent contrast-enhanced SBCT. In total, 20 markers of 4 different types were analyzed for artifacts. The extent of artifacts with and without MAR was measured via the consensus of two readers. Image noise was quantitatively evaluated, and the effect of MAR on the detectability of breast lesions was evaluated on a 3-point Likert scale. Results: Breast markers caused significant artifacts that impaired image quality and the detectability of lesions. MAR decreased artifact size in all analyzed cases, even in cases with multiple markers in a single slice. The median length of in-plain artifacts significantly decreased from 31 mm (range 11–51 mm) in uncorrected to 2 mm (range 1–5 mm) in corrected images (p ≤ 0.05). Artifact size was dependent on marker size. Image noise in slices affected by artifacts was significantly lower in corrected (13.6 ± 2.2 HU) than in uncorrected images (19.2 ± 6.8 HU, p ≤ 0.05). MAR improved the detectability of lesions affected by artifacts in 5 out of 11 cases. Conclusion: MAR is feasible in SBCT and improves the image quality and detectability of lesions.

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Section: Discussionsupporting

confidence: 93%

Feasibility of In Vivo Metal Artifact Reduction in Contrast-Enhanced Dedicated Spiral Breast Computed Tomography

Wetzl,

Wenkel,

Steiding

et al. 2023

Diagnostics

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“…In our study, B-CT image quality was generally regarded as high, with negligible complaints resulting from known "ring" artifacts caused by the image reconstruction algorithm or those artifacts caused by postinterventional tissue markers. 10,19 Exceptionally low image quality ratings, which very rarely occurred, might be explained by movement artifacts or technical problems during data acquisition.…”

Section: Discussionmentioning

confidence: 99%

Clinical assessment of image quality, usability and patient comfort in dedicated spiral breast computed tomography

et al. 2022

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“…None of the women presented a breast tissue marker to allow for comparison in terms of beam-hardening artifacts. A previous phantom study showed a significant effect of breast markers on image quality, and this factor should be considered when women with previous breast interventions undergo B-CT. 35 As the images are cross-sectional and can be evaluated using different planes, a longer reading time compared with mammograms is foreseeable. Nevertheless, optimization of image reconstruction has the potential to assist the radiologist for the depiction and characterization of breast lesions to expedite the reading process.…”

Section: Discussionmentioning

confidence: 99%

Dedicated Breast Computed Tomography With a Photon-Counting Detector

et al. 2019

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OBJECTIVES: The purpose of this work is to present the data obtained from the first clinical in vivo application of a new dedicated spiral breast computed tomography (B-CT) equipped with a photon-counting detector. MATERIALS AND METHODS: The institutional review board approved this retrospective study. Twelve women referred for breast cancer screening were included and underwent bilateral spiral B-CT acquired in prone position. Additional sonography was performed in case of dense breast tissue or any B-CT findings. In 3 women, previous mammography was available for comparison. Soft tissue (ST) and high-resolution (HR) images were reconstructed. Two independent radiologists performed separately the readout for subjective image quality and for imaging findings detection. Objective image quality evaluation was performed in consensus and included spatial resolution, contrast resolution, signal-to-noise ratio (SNR), and contrast-to-noise ratio. All women were asked to report about positioning comfort and overall comfort during data acquisition. RESULTS: The major pectoral muscle was included in 15 breast CT scans (62.5%); glandular component was partially missing in 2 (8.3%) of the 24 scanned breasts. A thin "ring artifact" was present in all scans but had no influence on image interpretations; no other artifacts were present. Subjective image quality assessment showed excellent agreement between the 2 readers (= 1). Three masses were depicted in B-CT and were confirmed as simple cysts in sonography. Additional 5 simple cysts and 2 solid benign lesions were identified only in sonography. A total of 12 calcifications were depicted with a median size of 1.1 mm (interquartile range, 0.7-1.7 mm) on HR and 1.4 mm (interquartile range, 1.1-1.8 mm) on ST images. Median SNRgl, SNRfat, and contrast-to-noise ratio were significantly higher in ST than in HR reconstructions (each, P < 0.001). A mild discomfort due to positioning of the rib cage on the table was reported by 2 women (16.7%); otherwise, no discomfort was reported. CONCLUSIONS: The new dedicated B-CT equipped with a photon-counting detector provides high-quality images with potential for screening of breast cancer along with minor patient discomfort.

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Artifacts Caused by Breast Tissue Markers in a Dedicated Cone-beam Breast CT in Comparison to Full-field Digital Mammography

Cited by 6 publications

References 24 publications

Feasibility of In Vivo Metal Artifact Reduction in Contrast-Enhanced Dedicated Spiral Breast Computed Tomography

Feasibility of In Vivo Metal Artifact Reduction in Contrast-Enhanced Dedicated Spiral Breast Computed Tomography

Clinical assessment of image quality, usability and patient comfort in dedicated spiral breast computed tomography

Dedicated Breast Computed Tomography With a Photon-Counting Detector

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