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International Journal of Biomedical Imaging

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https://www.readbyqxmd.com/read/30275820/an-automated-approach-for-epilepsy-detection-based-on-tunable-q-wavelet-and-firefly-feature-selection-algorithm
#1
Ahmed I Sharaf, Mohamed Abu El-Soud, Ibrahim M El-Henawy
Detection of epileptic seizures using an electroencephalogram (EEG) signals is a challenging task that requires a high level of skilled neurophysiologists. Therefore, computer-aided detection provides an asset to the neurophysiologist in interpreting the EEG. This paper introduces a novel approach to recognize and classify the epileptic seizure and seizure-free EEG signals automatically by an intelligent computer-aided method. Moreover, the prediction of the preictal phase of the epilepsy is proposed to assist the neurophysiologist in the clinic...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/30245706/super-resolution-of-magnetic-resonance-images-via-convex-optimization-with-local-and-global-prior-regularization-and-spectrum-fitting
#2
Naoki Kawamura, Tatsuya Yokota, Hidekata Hontani
Given a low-resolution image, there are many challenges to obtain a super-resolved, high-resolution image. Many of those approaches try to simultaneously upsample and deblur an image in signal domain. However, the nature of the super-resolution is to restore high-frequency components in frequency domain rather than upsampling in signal domain. In that sense, there is a close relationship between super-resolution of an image and extrapolation of the spectrum. In this study, we propose a novel framework for super-resolution, where the high-frequency components are theoretically restored with respect to the frequency fidelities...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/30174685/corrigendum-to-polychromatic-iterative-statistical-material-image-reconstruction-for-photon-counting-computed-tomography
#3
Thomas Weidinger, Thorsten M Buzug, Thomas G Flohr, Steffen Kappler, Karl Stierstorfer
[This corrects the article DOI: 10.1155/2016/5871604.].
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/30057592/medical-image-blind-integrity-verification-with-krawtchouk-moments
#4
Xu Zhang, Xilin Liu, Yang Chen, Huazhong Shu
A new blind integrity verification method for medical image is proposed in this paper. It is based on a new kind of image features, known as Krawtchouk moments, which we use to distinguish the original images from the modified ones. Basically, with our scheme, image integrity verification is accomplished by classifying images into the original and modified categories. Experiments conducted on medical images issued from different modalities verified the validity of the proposed method and demonstrated that it can be used to detect and discriminate image modifications of different types with high accuracy...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29971096/estimation-of-the-craniectomy-surface-area-by-using-postoperative-images
#5
Meng-Yin Ho, Wei-Lung Tseng, Furen Xiao
Decompressive craniectomy (DC) is a neurosurgical procedure performed to relieve the intracranial pressure engendered by brain swelling. However, no easy and accurate method exists for determining the craniectomy surface area. In this study, we implemented and compared three methods of estimating the craniectomy surface area for evaluating the decompressive effort. We collected 118 sets of preoperative and postoperative brain computed tomography images from patients who underwent craniectomy procedures between April 2009 and April 2011...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29971095/instant-feedback-rapid-prototyping-for-gpu-accelerated-computation-manipulation-and-visualization-of-multidimensional-data
#6
Maximilian Malek, Christoph W Sensen
Objective: We have created an open-source application and framework for rapid GPU-accelerated prototyping, targeting image analysis, including volumetric images such as CT or MRI data. Methods: A visual graph editor enables the design of processing pipelines without programming. Run-time compiled compute shaders enable prototyping of complex operations in a matter of minutes. Results: GPU-acceleration increases processing the speed by at least an order of magnitude when compared to traditional multithreaded CPU-based implementations, while offering the flexibility of scripted implementations...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29887876/adaptive-diffeomorphic-multiresolution-demons-and-their-application-to-same-modality-medical-image-registration-with-large-deformation
#7
Chang Wang, Qiongqiong Ren, Xin Qin, Yi Yu
Diffeomorphic demons can guarantee smooth and reversible deformation and avoid unreasonable deformation. However, the number of iterations needs to be set manually, and this greatly influences the registration result. In order to solve this problem, we proposed adaptive diffeomorphic multiresolution demons in this paper. We used an optimized framework with nonrigid registration and diffeomorphism strategy, designed a similarity energy function based on grey value, and stopped iterations adaptively. This method was tested by synthetic image and same modality medical image...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29853828/computer-aided-grading-of-gliomas-combining-automatic-segmentation-and-radiomics
#8
Wei Chen, Boqiang Liu, Suting Peng, Jiawei Sun, Xu Qiao
Gliomas are the most common primary brain tumors, and the objective grading is of great importance for treatment. This paper presents an automatic computer-aided diagnosis of gliomas that combines automatic segmentation and radiomics, which can improve the diagnostic ability. The MRI data containing 220 high-grade gliomas and 54 low-grade gliomas are used to evaluate our system. A multiscale 3D convolutional neural network is trained to segment whole tumor regions. A wide range of radiomic features including first-order features, shape features, and texture features is extracted...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29853827/corrigendum-to-recent-advances-in-microwave-imaging-for-breast-cancer-detection
#9
Sollip Kwon, Seungjun Lee
[This corrects the article DOI: 10.1155/2016/5054912.].
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29849536/brain-midline-shift-measurement-and-its-automation-a-review-of-techniques-and-algorithms
#10
REVIEW
Chun-Chih Liao, Ya-Fang Chen, Furen Xiao
Midline shift (MLS) of the brain is an important feature that can be measured using various imaging modalities including X-ray, ultrasound, computed tomography, and magnetic resonance imaging. Shift of midline intracranial structures helps diagnosing intracranial lesions, especially traumatic brain injury, stroke, brain tumor, and abscess. Being a sign of increased intracranial pressure, MLS is also an indicator of reduced brain perfusion caused by an intracranial mass or mass effect. We review studies that used the MLS to predict outcomes of patients with intracranial mass...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29805438/cryo-imaging-and-software-platform-for-analysis-of-molecular-mr-imaging-of-micrometastases
#11
Mohammed Q Qutaish, Zhuxian Zhou, David Prabhu, Yiqiao Liu, Mallory R Busso, Donna Izadnegahdar, Madhusudhana Gargesha, Hong Lu, Zheng-Rong Lu, David L Wilson
We created and evaluated a preclinical, multimodality imaging, and software platform to assess molecular imaging of small metastases. This included experimental methods (e.g., GFP-labeled tumor and high resolution multispectral cryo-imaging), nonrigid image registration, and interactive visualization of imaging agent targeting. We describe technological details earlier applied to GFP-labeled metastatic tumor targeting by molecular MR (CREKA-Gd) and red fluorescent (CREKA-Cy5) imaging agents. Optimized nonrigid cryo-MRI registration enabled nonambiguous association of MR signals to GFP tumors...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29736165/classification-of-alzheimer-s-and-mci-patients-from-semantically-parcelled-pet-images-a-comparison-between-av45-and-fdg-pet
#12
Seyed Hossein Nozadi, Samuel Kadoury, The Alzheimer's Disease Neuroimaging Initiative
Early identification of dementia in the early or late stages of mild cognitive impairment (MCI) is crucial for a timely diagnosis and slowing down the progression of Alzheimer's disease (AD). Positron emission tomography (PET) is considered a highly powerful diagnostic biomarker, but few approaches investigated the efficacy of focusing on localized PET-active areas for classification purposes. In this work, we propose a pipeline using learned features from semantically labelled PET images to perform group classification...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29731769/optimization-of-visual-information-presentation-for-visual-prosthesis
#13
Fei Guo, Yuan Yang, Yong Gao
Visual prosthesis applying electrical stimulation to restore visual function for the blind has promising prospects. However, due to the low resolution, limited visual field, and the low dynamic range of the visual perception, huge loss of information occurred when presenting daily scenes. The ability of object recognition in real-life scenarios is severely restricted for prosthetic users. To overcome the limitations, optimizing the visual information in the simulated prosthetic vision has been the focus of research...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29623087/ebg-based-microstrip-patch-antenna-for-brain-tumor-detection-via-scattering-parameters-in-microwave-imaging-system
#14
Reefat Inum, Md Masud Rana, Kamrun Nahar Shushama, Md Anwarul Quader
A microwave brain imaging system model is envisaged to detect and visualize tumor inside the human brain. A compact and efficient microstrip patch antenna is used in the imaging technique to transmit equivalent signal and receive backscattering signal from the stratified human head model. Electromagnetic band gap (EBG) structure is incorporated on the antenna ground plane to enhance the performance. Rectangular and circular EBG structures are proposed to investigate the antenna performance. Incorporation of circular EBG on the antenna ground plane provides an improvement of 22...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29610569/respiratory-motion-correction-for-compressively-sampled-free-breathing-cardiac-mri-using-smooth-l-1-norm-approximation
#15
Muhammad Bilal, Jawad Ali Shah, Ijaz M Qureshi, Kushsairy Kadir
Transformed domain sparsity of Magnetic Resonance Imaging (MRI) has recently been used to reduce the acquisition time in conjunction with compressed sensing (CS) theory. Respiratory motion during MR scan results in strong blurring and ghosting artifacts in recovered MR images. To improve the quality of the recovered images, motion needs to be estimated and corrected. In this article, a two-step approach is proposed for the recovery of cardiac MR images in the presence of free breathing motion. In the first step, compressively sampled MR images are recovered by solving an optimization problem using gradient descent algorithm...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29552029/localizing-optic-disc-in-retinal-image-automatically-with-entropy-based-algorithm
#16
Lamia AbedNoor Muhammed
Examining retinal image continuously plays an important role in determining human eye health; with any variation present in this image, it may be resulting from some disease. Therefore, there is a need for computer-aided scanning for retinal image to perform this task automatically and accurately. The fundamental step in this task is identification of the retina elements; optical disk localization is the most important one in this identification. Different optical disc localization algorithms have been suggested, such as an algorithm that would be proposed in this paper...
2018: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29317858/saliency-based-bleeding-localization-for-wireless-capsule-endoscopy-diagnosis
#17
Hongda Chen, Shaoze Wang, Yong Ding, Dahong Qian
Stomach bleeding is a kind of gastrointestinal disease which can be diagnosed noninvasively by wireless capsule endoscopy (WCE). However, it requires much time for physicians to scan large amount of WCE images. Alternatively, computer-assisted bleeding localization systems are developed where color, edge, and intensity features are defined to distinguish lesions from normal tissues. This paper proposes a saliency-based localization system where three saliency maps are computed: phase congruency-based edge saliency map derived from Log-Gabor filter bands, intensity histogram-guided intensity saliency map, and red proportion-based saliency map...
2017: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29250107/narrow-energy-width-ct-based-on-multivoltage-x-ray-image-decomposition
#18
Jiaotong Wei, Yan Han, Ping Chen
A polychromatic X-ray beam causes the grey of the reconstructed image to depend on its position within a solid and the material being imaged. This factor makes quantitative measurements via computed tomography (CT) imaging very difficult. To obtain a narrow-energy-width reconstructed image, we propose a model to decompose multivoltage X-ray images into many narrow-energy-width X-ray images by utilizing the low frequency characteristics of X-ray scattering. It needs no change of hardware in the typical CT system...
2017: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29234351/space-and-time-resolved-detection-of-platelet-activation-and-von-willebrand-factor-conformational-changes-in-deep-suspensions
#19
Jacopo Biasetti, Kaushik Sampath, Angel Cortez, Alaleh Azhir, Assaf A Gilad, Thomas S Kickler, Tobias Obser, Zaverio M Ruggeri, Joseph Katz
Tracking cells and proteins' phenotypic changes in deep suspensions is critical for the direct imaging of blood-related phenomena in in vitro replica of cardiovascular systems and blood-handling devices. This paper introduces fluorescence imaging techniques for space and time resolved detection of platelet activation, von Willebrand factor (VWF) conformational changes, and VWF-platelet interaction in deep suspensions. Labeled VWF, platelets, and VWF-platelet strands are suspended in deep cuvettes, illuminated, and imaged with a high-sensitivity EM-CCD camera, allowing detection using an exposure time of 1 ms...
2017: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/29225613/a-multitasking-electrical-impedance-tomography-system-using-titanium-alloy-electrode
#20
Abdalla Salama, Amin Malekmohammadi, Shahram Mohanna, Rajprasad Rajkumar
This paper presents a multitasking electrical impedance tomography (EIT) system designed to improve the flexibility and durability of an existing EIT system. The ability of the present EIT system to detect, locate, and reshape objects was evaluated by four different experiments. The results of the study show that the system can detect and locate an object with a diameter as small as 1.5 mm in a testing tank with a diameter of 134 mm. Moreover, the results demonstrate the ability of the current system to reconstruct an image of several dielectric object shapes...
2017: International Journal of Biomedical Imaging
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