Hui Liu1, Yuanjie Zheng2, Dong Liang3, Pinpin Tang1, Fuquan Ren4, Lina Zhang5, Zuowei Zhao6. 1. Department of Biomedical Engineering, Dalian University of Technology, Dalian, 116024, China. 2. School of Information Science & Engineering and Institute of Life Sciences, Shandong Normal University, Jinan, 250014, China. 3. Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, ShenZheng, 518000, China. 4. Department of Biomedical Engineer, Dalian University of Technology, Dalian, 116024, China. 5. Department of Radiology, First Affiliated Hospital, Dalian Medical University, Dalian, 116027, China. 6. Department of Radiology, Second Affiliated Hospital, Dalian Medical University, Dalian, 116027, China.
Abstract
PURPOSE: This study aims to obtain the accurate time intensity curve (TIC) of a dynamic contrast-enhanced magnetic resonance image (DCE-MRI) by eliminating the normal tissue enhancement and obtaining pure lesion information. The TIC of DCE-MRI is sometimes distorted because of the influence of normal tissue. In this paper, a new tracer-kinetic modeling based on total variation (DC-TV) is proposed to address this problem by decomposing the DCE-MRI into the normal tissue image and the lesion image. As TIC generation is not standardized and a credible program is expected, an accurate TIC generation is presented in this paper. MATERIALS AND METHODS: We propose a new tracer-kinetic model DC-TV to decompose the lesion region in breast DCE-MRIs. The original image is decomposed into a normal tissue image and a lesion image to obtain the pure lesion enhancement information. The acquired lesion images are smooth and correspond to the diffusion of the contrast agent in the lesion. The normal tissue image sequences are stable and correspond to the enhanced normal tissue. To speed up the computational process of our convergent algorithm, the split Bregman iteration algorithm is applied. To compare the algorithm results, images generated by decomposed methods without normal tissue constraint based on total variation are compared with those generated by our method. The performance of the proposed method is evaluated by the correlation of normal tissue images with the lesion classification accuracy of lesion images. RESULTS: Ninety-eight lesions, including 40 benign and 58 malignant, are evaluated. The dataset includes various typical pathologies of the breast such as invasive ductal carcinoma, ductal carcinoma in situ, tubular carcinoma, phyllodes tumor, hyperplasia, and fibroadenoma, among others. The area under the ROC for the pure lesion enhancement images acquired by DC-TV is greater than that acquired by the original DCE-MRIs. CONCLUSIONS: The pure enhancement information from the original breast DCE-MRI lesions can be successfully obtained using our DC-TV. The TICs based on the acquired pure enhancement information closely conform to three-time-point model, which is a classic diagnosis rule. The experiment shows that DC-TV provide a credible TIC generation program.
PURPOSE: This study aims to obtain the accurate time intensity curve (TIC) of a dynamic contrast-enhanced magnetic resonance image (DCE-MRI) by eliminating the normal tissue enhancement and obtaining pure lesion information. The TIC of DCE-MRI is sometimes distorted because of the influence of normal tissue. In this paper, a new tracer-kinetic modeling based on total variation (DC-TV) is proposed to address this problem by decomposing the DCE-MRI into the normal tissue image and the lesion image. As TIC generation is not standardized and a credible program is expected, an accurate TIC generation is presented in this paper. MATERIALS AND METHODS: We propose a new tracer-kinetic model DC-TV to decompose the lesion region in breast DCE-MRIs. The original image is decomposed into a normal tissue image and a lesion image to obtain the pure lesion enhancement information. The acquired lesion images are smooth and correspond to the diffusion of the contrast agent in the lesion. The normal tissue image sequences are stable and correspond to the enhanced normal tissue. To speed up the computational process of our convergent algorithm, the split Bregman iteration algorithm is applied. To compare the algorithm results, images generated by decomposed methods without normal tissue constraint based on total variation are compared with those generated by our method. The performance of the proposed method is evaluated by the correlation of normal tissue images with the lesion classification accuracy of lesion images. RESULTS: Ninety-eight lesions, including 40 benign and 58 malignant, are evaluated. The dataset includes various typical pathologies of the breast such as invasive ductal carcinoma, ductal carcinoma in situ, tubular carcinoma, phyllodes tumor, hyperplasia, and fibroadenoma, among others. The area under the ROC for the pure lesion enhancement images acquired by DC-TV is greater than that acquired by the original DCE-MRIs. CONCLUSIONS: The pure enhancement information from the original breast DCE-MRI lesions can be successfully obtained using our DC-TV. The TICs based on the acquired pure enhancement information closely conform to three-time-point model, which is a classic diagnosis rule. The experiment shows that DC-TV provide a credible TIC generation program.