Composite x-ray image assembly for large-field digital mammography with one- and two-dimensional positioning of a focal plane array.
Composite x-ray image assembly for large-field digital mammography with one- and two-dimensional positioning of a focal plane array.
复制标题
用于大视场数字乳腺 X 线摄影的复合 X 射线图像组件，具有焦平面阵列的一维和二维定位。
作者：
Halama,G;McAdoo,J;Liu,H
为了证明一种新型大视场数字乳房x线摄影技术的可行性，将Loral电荷耦合器件（CCD）焦平面阵列（FPA）放置在乳房x线摄影场中，分别使用一维和二维扫描序列获得和合成图像。这些实验验证了fpa的精确定位产生了无缝复合材料，并且CCD拼接概念具有高分辨率，大视场成像的潜力。提出的CCD拼接概念类似于棋盘图案，在驱动器和读出电子器件之间留有间距。为了获得完整的x射线图像，马赛克必须重新定位四次，在每个位置进行x射线曝光。为了减少患者的剂量，在x射线源和患者之间放置一个带有适当图案孔的铅屏蔽。高精度机动平移台和光纤耦合闪烁屏ccd传感器组件被放置在胶片盒通常占据的位置。由于这些子图像具有较高的机械精度，因此可以构建无缝复合图像。本文讨论了定位、图像对齐过程和合成图像结果。本文只讨论了从子图像中形成无缝合成图像，而不会考虑铅屏蔽、多个ccd或运动速度的影响。
To demonstrate the feasibility of a novel large‐field digital mammography technique, a Loral charge‐coupled device (CCD) focal plane array (FPA) was positioned in a mammographic field with one‐ and two‐dimensional scan sequences to obtain and composite images, respectively. These experiments verify that precise positioning of FPAs produced seamless composites and that the CCD mosaic concept has potential for high‐resolution, large‐field imaging. The proposed CCD mosaic concept resembles a checkerboard pattern with spacing left between the CCDs for the driver and readout electronics. To obtain a complete x‐ray image, the mosaic must be repositioned four times, with an x‐ray exposure at each position. To reduce the patient dose, a lead shield with appropriately patterned holes is placed between the x‐ray source and the patient. The high‐precision motorized translation stages and the fiber‐coupled‐scintillating‐screen–CCD sensor assembly were placed in the position usually occupied by the film cassette. Because of the high mechanical precision, seamless composites were constructed from the subimages. This paper discusses the positioning, image alignment procedure, and composite image results. The paper only addresses the formation of a seamless composite image from subimages and will not consider the effects of the lead shield, multiple CCDs, or the speed of motion.
大视场数字乳腺X线摄影的CCD拼接技术
DOI：
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发表时间：
1996
期刊：
IEEE Trans. Medical Imaging
影响因子：
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作者：
A. Jalink;J. McAdoo;G. Halama;Hong Liu
通讯作者：
Hong Liu