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A Second Pass Correction Method for Calcification Artifacts in Digital Breast Tomosynthesis

机译:用于数字乳房断层合成中的钙化伪影的第二次传递校正方法

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Digital breast tomosynthesis (DBT) allows a quasi-3D reconstruction of the breast with high in-plane and poor depth resolution by the principles of limited angle tomography. The limited angular range and the coarse angular sampling result in prominent streak artifacts arising from high-contrast structures such as calcifications. These artifacts do not only degrade the image quality but also hold the risk of overlaying suspicious tissue structure in neighbouring slices, which might therefore be overlooked. This work presents a second pass method for correcting these kinds of high-contrast streak artifacts. In a first pass reconstruction the candidate high-contrast calcifications are segmented and subtracted from the original projection data to generate a subsequent artifact-free second pass reconstruction. The method is demonstrated in a simulation study using software breast phantoms, which have been derived from segmented MRI data.
机译:数字乳房Tomosynthesis(DBT)允许通过有限角质断层扫描的原理进行高度平面和深度分辨率的乳房准三维重建。有限的角度范围和粗角采样产生从诸如钙化的高造影结构产生的突出条纹伪像。这些工件不仅降低了图像质量,而且还具有覆盖相邻切片中的可疑组织结构的风险,因此可能被忽视。这项工作提出了一种用于校正这些高对比度条纹伪影的第二种传递方法。在第一传递重建中,候选高对比度钙化被分割并从原始投影数据中减去以产生随后的无伪像第二通过重建。该方法在使用软件乳房幽灵的模拟研究中进行了说明,该研究已经来自分段的MRI数据。

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