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An Improved Tamper Detection and Localization Scheme for Volumetric DICOM Images

机译:改进的体积DICOM图像篡改检测和定位方案

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摘要

The development of teleradiology brings the convenience of global medical record access along with the concerns over the security of medical images transmitted over the open network. With the prevailing adoption of three-dimensional (3-D) imaging modalities, it is vital to develop a security mechanism to provide large volumes of medical images with privacy and reliability. This paper presents the development of a new and improved method of implementing tamper detection and localization based on a fully reversible digital watermarking scheme for the protection of volumetric DICOM images. This tamper detection and localization method utilizes the 3-D property of volumetric data to achieve much faster processing time at both sender and receiver sides without compromising tamper localization accuracy. The performance of the proposed scheme was evaluated by using sample volumetric DICOM images. Results show that the scheme achieved on average about 65 % and 72 % reduction in watermarking and dewatermarking processing time, respectively. For cases where the images had been tampered, it is possible to detect and localize the tampered areas with improved localization resolution in the images using the scheme.
机译:远程放射学的发展带来了全球医疗记录访问的便利,以及对通过开放网络传输的医学图像的安全性的担忧。随着三维(3-D)成像方式的普遍采用,至关重要的是要开发一种安全机制,以提供具有保密性和可靠性的大量医学图像。本文提出了一种基于完全可逆的数字水印方案来实现篡改检测和定位的新型改进方法的开发,该方案可用于保护体积DICOM图像。这种篡改检测和定位方法利用体积数据的3D属性在发送方和接收方都实现了更快的处理时间,而不会损害篡改定位的准确性。通过使用样本体积DICOM图像评估了所提出方案的性能。结果表明,该方案在水印和水印处理时间上分别平均减少了约65%和72%。对于图像已被篡改的情况,可以使用该方案在图像中以改进的定位分辨率检测和定位篡改区域。

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