论文标题

部分可观测时空混沌系统的无模型预测

Comparison of automatic prostate zones segmentation models in MRI images using U-net-like architectures

论文作者

Quihui-Rubio, Pablo Cesar, Ochoa-Ruiz, Gilberto, Gonzalez-Mendoza, Miguel, Rodriguez-Hernandez, Gerardo, Mata, Christian

论文摘要

前列腺癌是全世界男性癌症的第二常见癌症,也是癌症死亡的第六个主要原因。专家在诊断前列腺癌期间面临的主要问题是含有肿瘤组织的感兴趣区域(ROI)的定位。当前,在大多数情况下,该ROI的分割是由专家医生手动进行的,但是该程序受到某些患者的检测率低(约27-44%)或过度诊断的困扰。因此,几项研究工作解决了从磁共振图像中自动分割和提取ROI特征的挑战,因为此过程可以极大地促进许多诊断和治疗应用。但是,缺乏明确的前列腺界,前列腺组织固有的异质性以及多种前列腺形状使这一过程非常困难。我们使用分类跨透镜损失函数对多种深度学习模型(即U-NET,注意U-NET,密度密度,R2U-NET和R2U-NET)进行了比较。使用通常用于图像分割的三个指标进行分析:骰子得分,Jaccard索引和均方误差。为我们提供最佳结果分割的模型是R2U-NET,骰子,Jaccard和平均平方误差分别达到0.869、0.782和0.00013。

Prostate cancer is the second-most frequently diagnosed cancer and the sixth leading cause of cancer death in males worldwide. The main problem that specialists face during the diagnosis of prostate cancer is the localization of Regions of Interest (ROI) containing a tumor tissue. Currently, the segmentation of this ROI in most cases is carried out manually by expert doctors, but the procedure is plagued with low detection rates (of about 27-44%) or overdiagnosis in some patients. Therefore, several research works have tackled the challenge of automatically segmenting and extracting features of the ROI from magnetic resonance images, as this process can greatly facilitate many diagnostic and therapeutic applications. However, the lack of clear prostate boundaries, the heterogeneity inherent to the prostate tissue, and the variety of prostate shapes makes this process very difficult to automate.In this work, six deep learning models were trained and analyzed with a dataset of MRI images obtained from the Centre Hospitalaire de Dijon and Universitat Politecnica de Catalunya. We carried out a comparison of multiple deep learning models (i.e. U-Net, Attention U-Net, Dense-UNet, Attention Dense-UNet, R2U-Net, and Attention R2U-Net) using categorical cross-entropy loss function. The analysis was performed using three metrics commonly used for image segmentation: Dice score, Jaccard index, and mean squared error. The model that give us the best result segmenting all the zones was R2U-Net, which achieved 0.869, 0.782, and 0.00013 for Dice, Jaccard and mean squared error, respectively.

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