2013 IEEE 10th International Symposium on Biomedical Imaging最新文献_第5页

Identifying functional connectomics abnormality in attention deficit hyperactivity disorder 识别注意缺陷多动障碍的功能连接组异常

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556532

Peng Wang, Dajiang Zhu, Xiang Li, Hanbo Chen, Xi Jiang, Li Sun, Q. Cao, L. An, Tianming Liu, Yufeng Wang

{"title":"Identifying functional connectomics abnormality in attention deficit hyperactivity disorder","authors":"Peng Wang, Dajiang Zhu, Xiang Li, Hanbo Chen, Xi Jiang, Li Sun, Q. Cao, L. An, Tianming Liu, Yufeng Wang","doi":"10.1109/ISBI.2013.6556532","DOIUrl":"https://doi.org/10.1109/ISBI.2013.6556532","url":null,"abstract":"Attention deficit hyperactivity disorder (ADHD) is one of the most common psychiatric, neurodevelopmental and neurobehavioral disorders occurring in the childhood of human. The typical symptoms are characterized as excessive inattention, hyperactivity/impulsiveness or their combination. Traditionally, it has been thought to be a partial dysfunction caused by prefrontal-striatal circuits. Recent studies, however, indicate the involvement of other brain regions, including the occipital cortex and temporal cortex. Though researchers have already realized the importance of evaluation for the whole brain and multiple structural/functional networks, it is still very challenging to achieve consistent and comparable results across different labs. In the present paper, through the predefined cortical landmarks which possess group-wise structural consistency and intrinsic correspondence, we have the opportunity to access the whole brain and to reveal large-scale structural/functional connectomics abnormalities in ADHD. Our results not only confirmed that the major white matter (WM) alterations occurred at the anterior and posterior regions, but also indicate that hyper-interactions mainly exist between the emotion network and memory related networks. Our results also showed that hypo-interactions are found between the emotion and execution/attention networks. Hence, we hypothesize that the abnormal interactions associated with emotion network contribute to the dysfunction within the ADHD brain.","PeriodicalId":178011,"journal":{"name":"2013 IEEE 10th International Symposium on Biomedical Imaging","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129909325","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: 5

Model-based alignment of Look-Locker MRI sequences for calibrated myocardical scar tissue quantification 用于校准心肌瘢痕组织定量的Look-Locker MRI序列的基于模型的校准

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556655

M. V. D. Giessen, Q. Tao, R. Geest, B. Lelieveldt

{"title":"Model-based alignment of Look-Locker MRI sequences for calibrated myocardical scar tissue quantification","authors":"M. V. D. Giessen, Q. Tao, R. Geest, B. Lelieveldt","doi":"10.1109/ISBI.2013.6556655","DOIUrl":"https://doi.org/10.1109/ISBI.2013.6556655","url":null,"abstract":"The characterization of myocardial scar tissue in Late Gadolinium Enhancement (LGE) MRI volumes is hampered by the nonquantitative nature of MRI image intensities. Using the widely available Look-Locker (LL) sequence that images the heart using different inversion times a T1 map can be created per patient to calibrate the LGE datasets. However, due to the nature of the LL acquisition, the myocardium is imaged at different phases of the cardiac cycle, resulting in deformations between slices of the LL stack and preventing accurate T1 map estimates. In this paper a method is proposed for the non-rigid alignment of the LL stack that uses a model of the exponential contrast development throughout the LL stack to concurrently align all LL stack slices. The model based alignment is shown to be more robust than a pairwise mutual information based alignment. More importantly, correlations between the relaxivity (R1) map and the LGE intensities (needed for the LGE calibration) are higher using the proposed alignment than when using manual annotations. The model based alignment thereby allows the use of the LL sequence for LGE calibration without manually annotating the (typically) 33 slices in this sequence. After alignment, the myocardium only needs to be annotated in the LGE slice. The latter is also needed for non-calibrated scar quantification and thus requires no additional user effort.","PeriodicalId":178011,"journal":{"name":"2013 IEEE 10th International Symposium on Biomedical Imaging","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127209388","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: 7

Consistent hemodynamic response function estimation in functional MRI by first order differencing 一阶差分法估计功能性MRI一致性血流动力学响应函数

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556467

A. Seghouane, Adnan Shah

引用次数: 10

Sure-based parameter selection for parallel MRI reconstruction using GRAPPA and sparsity 利用GRAPPA和稀疏度进行并行MRI重建的可靠参数选择

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556634

D. Weller, S. Ramani, J. Nielsen, J. Fessler

引用次数: 6

Contrast-to-tissue ratio improvement by transmitted optimized binary signal in ultrasound pulse inversion imaging 超声脉冲反演成像中传输优化二值信号提高组织对比度

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556590

S. Ménigot, J. Girault

引用次数: 0

Using the Infocus-Breakpoint to estimate the scale of neoplasia in colonoscopy 用Infocus-Breakpoint估计结肠镜下肿瘤的大小

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556485

F. Chadebecq, C. Tilmant, A. Bartoli

引用次数: 10

Sparsifying transform learning for Compressed Sensing MRI 压缩感知MRI的稀疏化变换学习

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556401

S. Ravishankar, Y. Bresler

引用次数: 63

A FEM deformable mesh for active region segmentation 活动区域分割的有限元变形网格

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556673

K. Popuri, Dana Cobzas, Martin Jägersand

引用次数: 4

Variational approach for small-size lung nodule segmentation 小肺结节分割的变分法

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556417

A. Farag

引用次数: 18

Comparison of indices of regional lung function from 4-D X-ray CT: Jacobian vs. strain of deformation 4-D x线CT局部肺功能指标的比较:雅可比与变形应变

2013 IEEE 10th International Symposium on Biomedical Imaging Pub Date : 2013-04-07 DOI: 10.1109/ISBI.2013.6556558

M. Negahdar, N. Dunlap, A. Zacarias, A. Civelek, S. Woo, A. Amini

{"title":"Comparison of indices of regional lung function from 4-D X-ray CT: Jacobian vs. strain of deformation","authors":"M. Negahdar, N. Dunlap, A. Zacarias, A. Civelek, S. Woo, A. Amini","doi":"10.1109/ISBI.2013.6556558","DOIUrl":"https://doi.org/10.1109/ISBI.2013.6556558","url":null,"abstract":"In the literature, a widely adopted approach for assessing the regional lung function in patients undergoing radiation therapy for lung cancer from 4-D X-ray CT data is the Jacobian of deformation. The Jacobian which describes regional lung volume changes however lacks consideration of directional length changes during respiration. Previously, we proposed the use of strain for measurement of regional deformation in the Lung [1]. In this paper, we perform physiologic validation of lung strain and compare the results with those from the Jacobian measure. Lung deformation fields were computed through application of a recently proposed 3-D optical flow technique (MOFID) [2] to 4-D X-ray CT data sets collected in seven subjects diagnosed with non-small cell primary lung cancer. In addition to 4-D CT data, both SPECT ventilation (VSPECT), and SPECT perfusion (QSPECT) data were acquired in all subjects. For each case, voxel-wise statistical correlation of the Jacobian as well as principal strains of deformation (CT-derived pulmonary function images) with both ventilation and perfusion SPECT was performed. The results indicate that the maximum principal strain has a higher correlation with both SPECT ventilation and SPECT perfusion than other indices including the Jacobian.","PeriodicalId":178011,"journal":{"name":"2013 IEEE 10th International Symposium on Biomedical Imaging","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122584115","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: 4