Efficiently Indexing Multiple Repositories of Medical Image Databases

Paulo H. Oliveira, L. C. Scabora, M. Cazzolato, Willian D. Oliveira, A. Traina, C. Traina
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引用次数: 5

Abstract

Performing content-based image retrieval over large repositories of medical images demands efficient computational techniques. The use of such techniques is intended to speed up the work of physicians, who often have to deal with information from multiple data repositories. When dealing with multiple data repositories, the common computational approach is to search each repository separately and merge the multiple results into one final response, which slows down the whole process. This can be improved if we build a mechanism able to search several repositories as if they were a single one, i.e. a mechanism to search the whole domain of medical images. Aiming at this goal, we propose the Domain Index, a new category of index structures aimed at efficiently searching domains of data, regardless of the repository to which they belong. To evaluate our proposal, we carried out experiments over multiple mammography repositories involving k Nearest Neighbor (kNN) and Range queries. The results show that images from any repository are seamlessly retrieved, even sustaining gains in performance of up to 36% in kNN queries and up to 7% in Range queries. The experimental evaluation shows that the Domain Index allows fast retrieval from multiple data repositories for medical systems, allowing a better performance in similarity queries over them.
高效索引医学图像数据库的多个存储库
在大型医学图像存储库上执行基于内容的图像检索需要高效的计算技术。使用这些技术是为了加快医生的工作速度,因为他们经常必须处理来自多个数据存储库的信息。在处理多个数据存储库时,常见的计算方法是分别搜索每个存储库,并将多个结果合并到一个最终响应中,这减慢了整个过程。如果我们构建一种机制,能够像搜索单个存储库一样搜索多个存储库,即搜索整个医学图像域的机制,则可以改善这一点。针对这一目标,我们提出了领域索引,这是一种新的索引结构,旨在有效地搜索数据的领域,而不管它们属于哪个存储库。为了评估我们的建议,我们在涉及k最近邻(kNN)和范围查询的多个乳房x光检查存储库上进行了实验。结果表明,可以无缝地检索来自任何存储库的图像,甚至可以在kNN查询中保持高达36%的性能提升,在Range查询中保持高达7%的性能提升。实验评估表明,领域索引可以从医疗系统的多个数据存储库中快速检索,从而在相似度查询中获得更好的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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