IEEE Transactions on Information Technology in Biomedicine最新文献_第10页

Activity density map visualization and dissimilarity comparison for eldercare monitoring. 老年人活动密度图可视化及差异性比较。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-07-01 Epub Date: 2012-04-25 DOI: 10.1109/TITB.2012.2196439

Shuang Wang, Marjorie Skubic, Yingnan Zhu

{"title":"Activity density map visualization and dissimilarity comparison for eldercare monitoring.","authors":"Shuang Wang, Marjorie Skubic, Yingnan Zhu","doi":"10.1109/TITB.2012.2196439","DOIUrl":"https://doi.org/10.1109/TITB.2012.2196439","url":null,"abstract":"In this paper, we present a methodology for analyzing passive infrared motion sensor data logged in the homes of seniors. The objective is to capture activity patterns that represent different health conditions. Recognizing changes in the activity patterns can then be used to provide early detection of health changes. A visualization of motion sensor data is introduced in the form of a density map that uses different colors to show varying levels of activity. For evaluating the activity density level accurately, time away from home is determined first using a system of fuzzy rules. In addition, a dissimilarity between two density maps is computed using texture features for automatically determining changes in activity patterns, which may indicate a health problem. The activity density maps are being used in an aging in place senior housing community to aid clinicians in early illness detection. Three case studies of elderly residents are included to illustrate how the density map and dissimilarity measure can be used to track general activity level and daily patterns over time, showing changes in physical, cognitive, and mental health.","PeriodicalId":55008,"journal":{"name":"IEEE Transactions on Information Technology in Biomedicine","volume":" ","pages":"607-14"},"PeriodicalIF":0.0,"publicationDate":"2012-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TITB.2012.2196439","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40571029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 66

Assessment of sensing fire fighters uniforms for physiological parameter measurement in harsh environment. 恶劣环境下生理参数测量用传感消防员制服评定。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-05-01 Epub Date: 2012-01-05 DOI: 10.1109/TITB.2011.2182615

Davide Curone, Emanuele Lindo Secco, Laura Caldani, Antonio Lanatà, Rita Paradiso, Alessandro Tognetti, Giovanni Magenes

{"title":"Assessment of sensing fire fighters uniforms for physiological parameter measurement in harsh environment.","authors":"Davide Curone, Emanuele Lindo Secco, Laura Caldani, Antonio Lanatà, Rita Paradiso, Alessandro Tognetti, Giovanni Magenes","doi":"10.1109/TITB.2011.2182615","DOIUrl":"https://doi.org/10.1109/TITB.2011.2182615","url":null,"abstract":"In the last few years, much effort has been devoted to the development of wearable sensing systems able to monitor physiological, behavioral, and environmental parameters. Less has been done on the accurate testing and assessment of this instrumentation, especially when considering devices thought to be used in harsh environments by subjects or operators performing intense physical activities. This paper presents methodology and results of the evaluation of wearable physiological sensors under these conditions. The methodology has been applied to a specific textile-based prototype, aimed at the real-time monitoring of rescuers in emergency contexts, which has been developed within a European funded project called ProeTEX. Wearable sensor measurements have been compared with the ones of suitable gold standards through Bland-Altman statistical analysis; tests were realized in controlled environments simulating typical intervention conditions, with temperatures ranging from 20 °C to 45 °C and subjects performing mild to very intense activities. This evaluation methodology demonstrated to be effective for the definition of the limits of use of wearable sensors. Furthermore, the ProeTEX prototype demonstrated to be reliable, since it produced negligible errors when used for up to 1 h in normal environmental temperature (20 °C and 35 °C) and up to 30 min in harsher environment (45 °C).","PeriodicalId":55008,"journal":{"name":"IEEE Transactions on Information Technology in Biomedicine","volume":"16 3","pages":"501-11"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TITB.2011.2182615","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30374837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Fuzzy local Gaussian mixture model for brain MR image segmentation. 脑磁共振图像分割的模糊局部高斯混合模型。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-05-01 Epub Date: 2012-01-24 DOI: 10.1109/TITB.2012.2185852

Zexuan Ji, Yong Xia, Quansen Sun, Qiang Chen, Deshen Xia, David Dagan Feng

{"title":"Fuzzy local Gaussian mixture model for brain MR image segmentation.","authors":"Zexuan Ji, Yong Xia, Quansen Sun, Qiang Chen, Deshen Xia, David Dagan Feng","doi":"10.1109/TITB.2012.2185852","DOIUrl":"https://doi.org/10.1109/TITB.2012.2185852","url":null,"abstract":"Accurate brain tissue segmentation from magnetic resonance (MR) images is an essential step in quantitative brain image analysis. However, due to the existence of noise and intensity inhomogeneity in brain MR images, many segmentation algorithms suffer from limited accuracy. In this paper, we assume that the local image data within each voxel's neighborhood satisfy the Gaussian mixture model (GMM), and thus propose the fuzzy local GMM (FLGMM) algorithm for automated brain MR image segmentation. This algorithm estimates the segmentation result that maximizes the posterior probability by minimizing an objective energy function, in which a truncated Gaussian kernel function is used to impose the spatial constraint and fuzzy memberships are employed to balance the contribution of each GMM. We compared our algorithm to state-of-the-art segmentation approaches in both synthetic and clinical data. Our results show that the proposed algorithm can largely overcome the difficulties raised by noise, low contrast, and bias field, and substantially improve the accuracy of brain MR image segmentation.","PeriodicalId":55008,"journal":{"name":"IEEE Transactions on Information Technology in Biomedicine","volume":"16 3","pages":"339-47"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TITB.2012.2185852","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30421014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 120

Tumor recognition in wireless capsule endoscopy images using textural features and SVM-based feature selection. 基于纹理特征和svm特征选择的无线胶囊内窥镜图像肿瘤识别。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-05-01 Epub Date: 2012-01-24 DOI: 10.1109/TITB.2012.2185807

Baopu Li, Max Q-H Meng

引用次数: 174

Robust real-time-constrained estimation of respiratory motion for interventional MRI on mobile organs. 运动器官介入MRI呼吸运动鲁棒实时约束估计。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-05-01 Epub Date: 2012-03-09 DOI: 10.1109/TITB.2012.2190366

Sébastien Roujol, Jenny Benois-Pineau, Baudouin Denis de Senneville, Mario Ries, Bruno Quesson, Chrit T W Moonen

{"title":"Robust real-time-constrained estimation of respiratory motion for interventional MRI on mobile organs.","authors":"Sébastien Roujol, Jenny Benois-Pineau, Baudouin Denis de Senneville, Mario Ries, Bruno Quesson, Chrit T W Moonen","doi":"10.1109/TITB.2012.2190366","DOIUrl":"https://doi.org/10.1109/TITB.2012.2190366","url":null,"abstract":"Real-time magnetic resonance imaging is a promising tool for image-guided interventions. For applications such as thermotherapy on moving organs, a precise image-based compensation of motion is required in real time to allow quantitative analysis, retrocontrol of the interventional device, or determination of the therapy endpoint. Reduced field-of-view imaging represents a promising way to improve spatial and/or temporal resolution. However, it introduces new challenges for target motion estimation, since structures near the target may appear transiently due to the respiratory motion and the limited spatial coverage. In this paper, a new image-based motion estimation method is proposed combining a global motion estimation with a novel optical flow approach extending the initial Horn and Schunck (H&S) method by an additional regularization term. This term integrates the displacement of physiological landmarks into the variational formulation of the optical flow problem. This allowed for a better control of the optical flow in presence of transient structures. The method was compared to the same registration pipeline employing the H&S approach on a synthetic dataset and in vivo image sequences. Compared to the H&S approach, a significant improvement (p<0.05) of the Dice's similarity criterion computed between the reference and the registered organ positions was achieved.","PeriodicalId":55008,"journal":{"name":"IEEE Transactions on Information Technology in Biomedicine","volume":" ","pages":"365-74"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TITB.2012.2190366","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40158106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Noise-assisted correlation algorithm for suppressing noise-induced artifacts in ultrasonic Nakagami images. 超声中川图像中噪声诱发伪影抑制的噪声辅助相关算法。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-05-01 Epub Date: 2011-12-01 DOI: 10.1109/TITB.2011.2177851

Po-Hsiang Tsui, Chih-Kuang Yeh, Chih-Chung Huang

引用次数: 17

Semantic image retrieval in magnetic resonance brain volumes. 磁共振脑容量语义图像检索。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-05-01 Epub Date: 2012-02-28 DOI: 10.1109/TITB.2012.2189439

Azhar Quddus, Otman Basir

{"title":"Semantic image retrieval in magnetic resonance brain volumes.","authors":"Azhar Quddus, Otman Basir","doi":"10.1109/TITB.2012.2189439","DOIUrl":"https://doi.org/10.1109/TITB.2012.2189439","url":null,"abstract":"Practitioners in the area of neurology often need to retrieve multimodal magnetic resonance (MR) images of the brain to study disease progression and to correlate observations across multiple subjects. In this paper, a novel technique for retrieving 2-D MR images (slices) in 3-D brain volumes is proposed. Given a 2-D MR query slice, the technique identifies the 3-D volume among multiple subjects in the database, associates the query slice with a specific region of the brain, and retrieves the matching slice within this region in the identified volumes. The proposed technique is capable of retrieving an image in multimodal and noisy scenarios. In this study, support vector machines (SVM) are used for identifying 3-D MR volume and for performing semantic classification of the human brain into various semantic regions. In order to achieve reliable image retrieval performance in the presence of misalignments, an image registration-based retrieval framework is developed. The proposed retrieval technique is tested on various modalities. The test results reveal superior robustness performance with respect to accuracy, speed, and multimodality.","PeriodicalId":55008,"journal":{"name":"IEEE Transactions on Information Technology in Biomedicine","volume":"16 3","pages":"348-55"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TITB.2012.2189439","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30505014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 42

A review on digital ECG formats and the relationships between them. 数字心电格式及其相互关系的研究进展。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-05-01 Epub Date: 2011-11-22 DOI: 10.1109/TITB.2011.2176955

Jesús Daniel Trigo, Alvaro Alesanco, Ignacio Martínez, José García

{"title":"A review on digital ECG formats and the relationships between them.","authors":"Jesús Daniel Trigo, Alvaro Alesanco, Ignacio Martínez, José García","doi":"10.1109/TITB.2011.2176955","DOIUrl":"https://doi.org/10.1109/TITB.2011.2176955","url":null,"abstract":"A plethora of digital ECG formats have been proposed and implemented. This heterogeneity hinders the design and development of interoperable systems and entails critical integration issues for the healthcare information systems. This paper aims at performing a comprehensive overview on the current state of affairs of the interoperable exchange of digital ECG signals. This includes 1) a review on existing digital ECG formats, 2) a collection of applications and cardiology settings using such formats, 3) a compilation of the relationships between such formats, and 4) a reflection on the current situation and foreseeable future of the interoperable exchange of digital ECG signals. The objectives have been approached by completing and updating previous reviews on the topic through appropriate database mining. 39 digital ECG formats, 56 applications, tools or implantation experiences, 47 mappings/converters, and 6 relationships between such formats have been found in the literature. The creation and generalization of a single standardized ECG format is a desirable goal. However, this unification requires political commitment and international cooperation among different standardization bodies. Ongoing ontology-based approaches covering ECG domain have recently emerged as a promising alternative for reaching fully fledged ECG interoperability in the near future.","PeriodicalId":55008,"journal":{"name":"IEEE Transactions on Information Technology in Biomedicine","volume":"16 3","pages":"432-44"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TITB.2011.2176955","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30291056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 47

Artifact removal in physiological signals--practices and possibilities. 生理信号中的伪影去除——实践与可能性。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-05-01 Epub Date: 2012-02-22 DOI: 10.1109/TITB.2012.2188536

Kevin T Sweeney, Tomás E Ward, Seán F McLoone

{"title":"Artifact removal in physiological signals--practices and possibilities.","authors":"Kevin T Sweeney, Tomás E Ward, Seán F McLoone","doi":"10.1109/TITB.2012.2188536","DOIUrl":"https://doi.org/10.1109/TITB.2012.2188536","url":null,"abstract":"The combination of reducing birth rate and increasing life expectancy continues to drive the demographic shift toward an aging population. This, in turn, places an ever-increasing burden on healthcare due to the increasing prevalence of patients with chronic illnesses and the reducing income-generating population base needed to sustain them. The need to urgently address this healthcare \"time bomb\" has accelerated the growth in ubiquitous, pervasive, distributed healthcare technologies. The current move from hospital-centric healthcare toward in-home health assessment is aimed at alleviating the burden on healthcare professionals, the health care system and caregivers. This shift will also further increase the comfort for the patient. Advances in signal acquisition, data storage and communication provide for the collection of reliable and useful in-home physiological data. Artifacts, arising from environmental, experimental and physiological factors, degrade signal quality and render the affected part of the signal useless. The magnitude and frequency of these artifacts significantly increases when data collection is moved from the clinic into the home. Signal processing advances have brought about significant improvement in artifact removal over the past few years. This paper reviews the physiological signals most likely to be recorded in the home, documenting the artifacts which occur most frequently and which have the largest degrading effect. A detailed analysis of current artifact removal techniques will then be presented. An evaluation of the advantages and disadvantages of each of the proposed artifact detection and removal techniques, with particular application to the personal healthcare domain, is provided.","PeriodicalId":55008,"journal":{"name":"IEEE Transactions on Information Technology in Biomedicine","volume":"16 3","pages":"488-500"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TITB.2012.2188536","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30482658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 287

Contextualized access to electronical health records in cardiology. 心脏病学电子健康记录的情境化访问。

IEEE Transactions on Information Technology in Biomedicine Pub Date : 2012-05-01 Epub Date: 2011-12-20 DOI: 10.1109/TITB.2011.2178033

Belén Prados-Suárez, Carlos Molina, Carmen Peña Yañez, Miguel Prados de Reyes

{"title":"Contextualized access to electronical health records in cardiology.","authors":"Belén Prados-Suárez, Carlos Molina, Carmen Peña Yañez, Miguel Prados de Reyes","doi":"10.1109/TITB.2011.2178033","DOIUrl":"https://doi.org/10.1109/TITB.2011.2178033","url":null,"abstract":"In this paper, we propose a new approach for accessing the electronical health records (EHR), and we apply it to the cardiology medical specialty. Though the use of EHR improves the storage and access to the information in it regarding the previous health records in papers, it entails the risk of having the same problems of huge size and of becoming inoperative and really difficult to handle, especially if the user is looking for a specific data item. Our proposal is based on the contextualization of the access, providing the user with the most important information for the assistance act in which he/she is involved. To do this, we define the set of possible contexts and consider different aspects of the pertinence of the documents to each context. We do it by using fuzzy logic and pay special attention to the efficiency, due to the huge size of the involved databases. Our proposal does not limit the access to the EHR, but establishes a prioritization based on the access needs, which provides the system with an additional advantage, easily enabling the use of new terminals and devices like tablet PCs and PDAs, which have great limitations in the interfaces.","PeriodicalId":55008,"journal":{"name":"IEEE Transactions on Information Technology in Biomedicine","volume":"16 3","pages":"401-12"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TITB.2011.2178033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30344778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8