Szilárd Vajda, D. You, Sameer Kiran Antani, G. Thoma
{"title":"Label the many with a few: Semi-automatic medical image modality discovery in a large image collection","authors":"Szilárd Vajda, D. You, Sameer Kiran Antani, G. Thoma","doi":"10.1109/CICARE.2014.7007850","DOIUrl":"https://doi.org/10.1109/CICARE.2014.7007850","url":null,"abstract":"In this paper we present a fast and effective method for labeling images in a large image collection. Image modality detection has been of research interest for querying multimodal medical documents. To accurately predict the different image modalities using complex visual and textual features, we need advanced classification schemes with supervised learning mechanisms and accurate training labels. Our proposed method, on the other hand, uses a multiview-approach and requires minimal expert knowledge to semi-automatically label the images. The images are first projected in different feature spaces, and are then clustered in an unsupervised manner. Only the cluster representative images are labeled by an expert. Other images from the cluster “inherit” the labels from these cluster representatives. The final label assigned to each image is based on a voting mechanism, where each vote is derived from different feature space clustering. Through experiments we show that using only 0.3% of the labels was sufficient to annotate 300,000 medical images with 49.95% accuracy. Although, automatic labeling is not as precise as manual, it saves approximately 700 hours of manual expert labeling, and may be sufficient for next-stage classifier training. We find that for this collection accuracy improvements are feasible with better disparate feature selection or different filtering mechanisms.","PeriodicalId":120730,"journal":{"name":"2014 IEEE Symposium on Computational Intelligence in Healthcare and e-health (CICARE)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115759886","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}
{"title":"Identifying risk factors associate with hypoglycemic events","authors":"R. Duan, H. Fu, Chenchen Yu","doi":"10.1109/CICARE.2014.7007851","DOIUrl":"https://doi.org/10.1109/CICARE.2014.7007851","url":null,"abstract":"Episodes of hypoglycemia occurred over the study period and is one of the most noticeable adverse events in diabetes care. It is important to identify the factors causing hypoglycemic events and rank these factors by their importance. Most research works only use the time of first hypoglycemia onset and treat it as time to event endpoint due to the limitation of methodology. Traditional model selection methods are not able to provide variable importance in this context. Methods that are able to provide the variable importance, such as gradient boosting and random forest algorithms, cannot directly be applied to recurrent events data. In this paper, we propose a two-step method to identify risk factors that are associate with hypoglycemia. In general, this method allows us to evaluate the variable importance for recurrent events data. The performance of our proposed method are evaluated through intensive simulation studies.","PeriodicalId":120730,"journal":{"name":"2014 IEEE Symposium on Computational Intelligence in Healthcare and e-health (CICARE)","volume":"366 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126277797","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}
{"title":"Cognitively inspired speech processing for multimodal hearing technology","authors":"Andrew Abel, A. Hussain, B. Luo","doi":"10.1109/CICARE.2014.7007834","DOIUrl":"https://doi.org/10.1109/CICARE.2014.7007834","url":null,"abstract":"In recent years, the link between the various human communication production domains has become more widely utilised in the field of speech processing. Work by the authors and others has demonstrated that intelligently integrated audio and visual information can be used for speech enhancement. This advance in technology means that the use of visual information as part of hearing aids or assistive listening devices is becoming ever more viable. One issue that is not commonly explored is how a multimodal system copes with variations in data quality and availability, such as a speaker covering their face while talking, or the existence of multiple speakers in a conversational scenario, an issue that a hearing device would be expected to cope with by switching between different programmes and settings to adapt to changes in the environment. We present the ChallengAV audiovisual corpus, which is used to evaluate a novel fuzzy logic based audiovisual switching system, designed to be used as part of a next-generation adaptive, autonomous, context aware hearing system. Initial results show that the detectors are capable of determining environmental conditions and responding appropriately, demonstrating the potential of such an adaptive multimodal system as part of a state of the art hearing aid device.","PeriodicalId":120730,"journal":{"name":"2014 IEEE Symposium on Computational Intelligence in Healthcare and e-health (CICARE)","volume":"20 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120995313","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}
{"title":"Towards a Personal Health Records system for patients with Autism Spectrum Disorders","authors":"A. Coronato, Giovanni Paragliola","doi":"10.1109/CICARE.2014.7007839","DOIUrl":"https://doi.org/10.1109/CICARE.2014.7007839","url":null,"abstract":"Patients with Autism Spectrum Disorders (ASD) show symptoms that in general fall into three areas: 1) social impairment; 2) communication difficulties; and, 3) repetitive and stereotyped behaviors. The growing of people affected by such as diseases increases the need of technologies able to help better clinicians in the medical treatment. In this paper we present the designing and the developing of a Personal Health Records (PHR) system to assist clinicians and caregivers in the analyzing of clinical data and monitoring of anomalous gestures of patients with autism diseases. The detecting of anomalous gesture is made by using both Artificial Intelligence (AI) techniques and a framework based on formal methods. The research activity has been conducted in cooperation with clinicians of the Department of Child Psychiatry at Children's Hospital Santobono-Pausilipon in Naples.","PeriodicalId":120730,"journal":{"name":"2014 IEEE Symposium on Computational Intelligence in Healthcare and e-health (CICARE)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131289195","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}
{"title":"A novel mixed values k-prototypes algorithm with application to health care databases mining","authors":"Ahmed Najjar, Christian Gagné, D. Reinharz","doi":"10.1109/CICARE.2014.7007849","DOIUrl":"https://doi.org/10.1109/CICARE.2014.7007849","url":null,"abstract":"The current availability of large datasets composed of heterogeneous objects stresses the importance of large-scale clustering of mixed complex items. Several algorithms have been developed for mixed datasets composed of numerical and categorical variables, a well-known algorithm being the k-prototypes. This algorithm is efficient for clustering large datasets given its linear complexity. However, many fields are handling more complex data, for example variable-size sets of categorical values mixed with numerical and categorical values, which cannot be processed as is by the k-prototypes algorithm. We are proposing a variation of the k-prototypes clustering algorithm that can handle these complex entities, by using a bag-of-words representation for the multivalued categorical variables. We evaluate our approach on a real-world application to the clustering of administrative health care databases in Quebec, with results illustrating the good performances of our method.","PeriodicalId":120730,"journal":{"name":"2014 IEEE Symposium on Computational Intelligence in Healthcare and e-health (CICARE)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121971417","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}
{"title":"Privacy preservation, sharing and collection of patient records using cryptographic techniques for cross-clinical secondary analytics","authors":"H. Abdulrahman, N. Poh, J. Burnett","doi":"10.1109/CICARE.2014.7007847","DOIUrl":"https://doi.org/10.1109/CICARE.2014.7007847","url":null,"abstract":"The growing interest in research on Clinical Medical Records (CMRs) presents opportunities in finding meaningful patterns of symptoms, treatments and patient outcomes. The typically distributed collection of CMRs across various clinical centres suggests the need to integrate the records in a centralized data repository. This is necessary to explore many data analytic algorithms which are not supported on distributed databases. As highly private patient records are being dealt with, it is important to consider how privacy will be preserved. This is especially important since the patient records are to be shared and used for reasons other than the primary reasons they were collected, i.e., for secondary use of healthcare data. In addition, the need for securing data transmission becomes necessary to ensure privacy and confidentiality. We advance the literature on privacy-enhancing data minining in the healthcare setting by (1) presenting strategies of using de-identification as well as cryptographic techniques to facilitate patient identity protection and securely transmit the records to a centralized data repository for secondary data analytics; (2) addressing key management issues related to the use of cryptography constructs; and (3) establishing the security requirements as well as carrying out vulnerability assessment with respect to the tranmission process, data repository, and direct attacks to the encrypted patient ID.","PeriodicalId":120730,"journal":{"name":"2014 IEEE Symposium on Computational Intelligence in Healthcare and e-health (CICARE)","volume":"178 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125184316","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}