CAJ | 학술논문

目的：为了有效的利用图谱的先验信息和待分割图像的灰度信息，并在融合标号图像的过程中校正配准引起的误差，得到光滑、准确的分割结果，提出了一种新的基于引导滤波的多图谱医学图像分割方法。方法本文将多图谱配准与引导滤波相结合。该方法包含4个部分：第一部分为多图谱配准，通过配准将图谱中存储的形状先验信息映射到待分割图像；第二部为标号融合，利用配准的相似性作为权重，将形变后的标号图像融合在一起；第三部分为引导滤波，利用引导滤波引入待分割图像的灰度信息，可以校正配准引起的误差；最后通过阈值处理，得到最终的分割结果。结果对15例脑部MR图像数据中的海马体进行分割实验，左、右海马体分别达到了86%及87.4%的分割精度，与传统的标号融合算法相比，平均分割精度提升了2.4%。结论本文方法结合多配谱配准与引导滤波的优势，提高了海马的分割精度，并得到光滑有效的分割精度。
목적：위료유효적이용도보적선험신식화대분할도상적회도신식，병재융합표호도상적과정중교정배준인기적오차，득도광활、준학적분할결과，제출료일충신적기우인도려파적다도보의학도상분할방법。방법본문장다도보배준여인도려파상결합。해방법포함4개부분：제일부분위다도보배준，통과배준장도보중존저적형상선험신식영사도대분할도상；제이부위표호융합，이용배준적상사성작위권중，장형변후적표호도상융합재일기；제삼부분위인도려파，이용인도려파인입대분할도상적회도신식，가이교정배준인기적오차；최후통과역치처리，득도최종적분할결과。결과대15례뇌부MR도상수거중적해마체진행분할실험，좌、우해마체분별체도료86%급87.4%적분할정도，여전통적표호융합산법상비，평균분할정도제승료2.4%。결론본문방법결합다배보배준여인도려파적우세，제고료해마적분할정도，병득도광활유효적분할정도。
A novel medical automatic image segmentation strategy based on guided filtering and multi-atlas is proposed to achieve accurate, smooth, robust, and reliable segmentation. This framework consists of 4 elements: the multi- atlas registration, which uses the atlas prior information;the label fusion, in which the similarity measure of the registration is used as the weight to fuse the warped label;the guided filtering, which uses the local information of the target image to correct the registration errors; and the threshold approaches used to obtain the segment result. The experimental results showed part among the 15 brain MRI images used to segment the hippocampus region, the proposed method achieved a median Dice coefficient of 86%on the left hippocampus and 87.4%on the right hippocampus. Compared with the traditional label fusion algorithm, the proposed algorithm outperforms the common brain image segmentation methods with a good efficiency and accuracy.