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Texture mri

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https://www.readbyqxmd.com/read/29042619/diffusion-tensor-image-features-predict-idh-genotype-in-newly-diagnosed-who-grade-ii-iii-gliomas
#1
Paul Eichinger, Esther Alberts, Claire Delbridge, Stefano Trebeschi, Alexander Valentinitsch, Stefanie Bette, Thomas Huber, Jens Gempt, Bernhard Meyer, Juergen Schlegel, Claus Zimmer, Jan S Kirschke, Bjoern H Menze, Benedikt Wiestler
We hypothesized that machine learning analysis based on texture information from the preoperative MRI can predict IDH mutational status in newly diagnosed WHO grade II and III gliomas. This retrospective study included in total 79 consecutive patients with a newly diagnosed WHO grade II or III glioma. Local binary pattern texture features were generated from preoperative B0 and fractional anisotropy (FA) diffusion tensor imaging. Using a training set of 59 patients, a single hidden layer neural network was then trained on the texture features to predict IDH status...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28987630/mri-texture-analysis-reflects-histopathology-parameters-in-thyroid-cancer-a-first-preliminary-study
#2
Hans-Jonas Meyer, Stefan Schob, Anne Kathrin Höhn, Alexey Surov
OBJECT: Thyroid cancer represents the most frequent malignancy of the endocrine system with an increasing incidence worldwide. Novel imaging techniques are able to further characterize tumors and even predict histopathology features. Texture analysis is an emergent imaging technique to extract extensive data from an radiology images. The present study was therefore conducted to identify possible associations between texture analysis and histopathology parameters in thyroid cancer. METHODS: The radiological database was retrospectively reviewed for thyroid carcinoma...
October 5, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28971250/a-novel-texture-quantization-based-reversible-multiple-watermarking-scheme-applied-to-health-information-system
#3
Mousami Turuk, Ashwin Dhande
The recent innovations in information and communication technologies have appreciably changed the panorama of health information system (HIS). These advances provide new means to process, handle, and share medical images and also augment the medical image security issues in terms of confidentiality, reliability, and integrity. Digital watermarking has emerged as new era that offers acceptable solutions to the security issues in HIS. Texture is a significant feature to detect the embedding sites in an image, which further leads to substantial improvement in the robustness...
October 2, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/28945125/texture-analysis-of-magnetic-resonance-images-to-predict-histologic-grade-of-meningiomas-in-dogs
#4
Tommaso Banzato, Marco Bernardini, Giunio B Cherubini, Alessandro Zotti
OBJECTIVE To predict histologic grade of meningiomas in dogs via texture analysis (TA) of MRI scans of the brain and spinal cord. SAMPLE 58 sets of MRI scans of the brain and spinal cord of dogs with histologically diagnosed meningioma. PROCEDURES MRI sequences were divided into a training set and a test set, and results of histologic assessment were obtained. Tumors were histologically grouped as benign (stage I) or atypical-anaplastic (stage II or III). Texture analysis was performed by use of specialized software on T2-weighted (T2W) and pre- and postcontrast T1-weighted (T1W) images...
October 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28924574/structural-similarity-index-family-for-image-quality-assessment-in-radiological-images
#5
Gabriel Prieto Renieblas, Agustín Turrero Nogués, Alberto Muñoz González, Nieves Gómez-Leon, Eduardo Guibelalde Del Castillo
The structural similarity index (SSIM) family is a set of metrics that has demonstrated good agreement with human observers in tasks using reference images. These metrics analyze the viewing distance, edge information between the reference and the test images, changed and preserved edges, textures, and structural similarity of the images. Eight metrics based on that family are proposed. This new set of metrics, together with another eight well-known SSIM family metrics, was tested to predict human performance in some specific tasks closely related to the evaluation of radiological medical images...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28905201/assessment-of-intratumor-heterogeneity-in-mesenchymal-uterine-tumor-by-an-18-f-fdg-pet-ct-texture-analysis
#6
Tetsuya Tsujikawa, Makoto Yamamoto, Kunihiro Shono, Shizuka Yamada, Hideaki Tsuyoshi, Yasushi Kiyono, Hirohiko Kimura, Hidehiko Okazawa, Yoshio Yoshida
OBJECTIVE: The aim of this study was to retrospectively evaluate the clinical significance of (18)F-FDG PET/CT textural features for discriminating uterine sarcoma from leiomyoma. METHODS: Fifty-five patients with suspected uterine sarcoma based on ultrasound and MRI findings who underwent pretreatment (18)F-FDG PET/CT were included. Fifteen patients were histopathologically proven to have uterine sarcoma, 14 patients by surgical operation and one by biopsy, and 40 patients were diagnosed with leiomyoma by surgical operation or in a follow-up for at least 2 years...
September 13, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28887861/ultrasound-guided-intratumoral-radiofrequency-ablation-coagulation-to-facilitate-meningioma-resection-preliminary-experience
#7
Li Yan, Junle Yang, Xiaodong Zhou, Guangbin He, Yu Zheng, Yali Zhu, Weiping Liu, Wen Luo, Haiying Qin, Haijing Liu, Xicai Yi, Yin Zhou
OBJECTIVES: This study aimed to explore the feasibility and safety of intratumoral radiofrequency ablation (RFA) in meningioma resection. METHODS: This study was approved by the Xijing Ethics Committee, and informed consent was obtained from all of the patients. Thirteen patients with meningiomas were recruited in the Neurosurgery Department of Xijing Hospital. These patients were treated with intratumoral RFA and surgery. We also chose 13 patients with meningiomas treated with traditional surgery as the control group...
September 9, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28884356/diagnostic-value-of-mri-based-3d-texture-analysis-for-tissue-characterisation-and-discrimination-of-low-grade-chondrosarcoma-from-enchondroma-a-pilot-study
#8
Catharina S Lisson, Christoph G Lisson, Kerstin Flosdorf, Regine Mayer-Steinacker, Markus Schultheiss, Alexandra von Baer, Thomas F E Barth, Ambros J Beer, Matthias Baumhauer, Reinhard Meier, Meinrad Beer, Stefan A Schmidt
OBJECTIVES: To explore the diagnostic value of MRI-based 3D texture analysis to identify texture features that can be used for discrimination of low-grade chondrosarcoma from enchondroma. METHODS: Eleven patients with low-grade chondrosarcoma and 11 patients with enchondroma were retrospectively evaluated. Texture analysis was performed using mint Lesion: Kurtosis, entropy, skewness, mean of positive pixels (MPP) and uniformity of positive pixel distribution (UPP) were obtained in four MRI sequences and correlated with histopathology...
September 7, 2017: European Radiology
https://www.readbyqxmd.com/read/28861680/image-retrieval-based-on-local-mesh-vector-co-occurrence-pattern-for-medical-diagnosis-from-mri-brain-images
#9
A Jenitta, R Samson Ravindran
In modern health-care, for evidence-based diagnosis, there is a requirement for an efficient image retrieval approach to retrieve the cases of interest that have similar characteristics from the large image databases. This paper presents a feature extraction approach that aims at extracting texture features present in the medical images using Local Pattern Descriptor (LPD) and Gray-level Co-occurrence Matrix (GLCM). As a main contribution, a novel local pattern named Local Mesh Vector Co-occurrence Pattern (LMVCoP) has been proposed by concatenating the Local Mesh Co-occurrence Pattern (LMCoP) and the Local Vector Co-occurrence Pattern (LVCoP)...
August 31, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28858038/liver-fibrosis-quantification-by-magnetic-resonance-imaging
#10
Léonie Petitclerc, Guillaume Gilbert, Bich N Nguyen, An Tang
Liver fibrosis is a hallmark of chronic liver disease characterized by the excessive accumulation of extracellular matrix proteins. Although liver biopsy is the reference standard for diagnosis and staging of liver fibrosis, it has some limitations, including potential pain, sampling variability, and low patient acceptance. Hence, there has been an effort to develop noninvasive imaging techniques for diagnosis, staging, and monitoring of liver fibrosis. Many quantitative techniques have been implemented on magnetic resonance imaging (MRI) for this indication...
August 28, 2017: Topics in Magnetic Resonance Imaging: TMRI
https://www.readbyqxmd.com/read/28852821/conservatively-treated-knee-injury-is-associated-with-knee-cartilage-matrix-degeneration-measured-with-mri-based-t2-relaxation-times-data-from-the-osteoarthritis-initiative
#11
Felix C Hofmann, Jan Neumann, Ursula Heilmeier, Gabby B Joseph, Michael C Nevitt, Charles E McCulloch, Thomas M Link
OBJECTIVE: To investigate the association of cartilage degeneration with previous knee injuries not undergoing surgery, determined by morphologic and quantitative 3-T magnetic resonance imaging (MRI). MATERIALS AND METHODS: We performed a nested cross-sectional study of right knee MRIs from participants in the Osteoarthritis Initiative (OAI) aged 45-79 with baseline Kellgren-Lawrence score of 0-2. Cases were 142 right knees of patients with self-reported history of injury limiting the ability to walk for at least 2 days...
August 29, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28846741/decoding-social-intentions-in-human-prehensile-actions-insights-from-a-combined-kinematics-fmri-study
#12
Maria Grazia Di Bono, Chiara Begliomini, Sanja Budisavljevic, Luisa Sartori, Diego Miotto, Raffaella Motta, Umberto Castiello
Consistent evidence suggests that the way we reach and grasp an object is modulated not only by object properties (e.g., size, shape, texture, fragility and weight), but also by the types of intention driving the action, among which the intention to interact with another agent (i.e., social intention). Action observation studies ascribe the neural substrate of this 'intentional' component to the putative mirror neuron (pMNS) and the mentalizing (MS) systems. How social intentions are translated into executed actions, however, has yet to be addressed...
2017: PloS One
https://www.readbyqxmd.com/read/28845594/textural-features-of-dynamic-contrast-enhanced-mri-derived-model-free-and-model-based-parameter-maps-in-glioma-grading
#13
Tian Xie, Xiao Chen, Jingqin Fang, Houyi Kang, Wei Xue, Haipeng Tong, Peng Cao, Sumei Wang, Yizeng Yang, Weiguo Zhang
BACKGROUND: Presurgical glioma grading by dynamic contrast-enhanced MRI (DCE-MRI) has unresolved issues. PURPOSE: The aim of this study was to investigate the ability of textural features derived from pharmacokinetic model-based or model-free parameter maps of DCE-MRI in discriminating between different grades of gliomas, and their correlation with pathological index. STUDY TYPE: Retrospective. SUBJECTS: Forty-two adults with brain gliomas...
August 28, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28837046/association-between-pathology-and-texture-features-of-multi-parametric-mri-of-the-prostate
#14
Peter Kuess, Piotr Andrzejewski, David Nilsson, Petra Georg, Johannes Knoth, Martin Susani, Johan Trygg, Thomas H Helbich, Stephan H Polanec, Dietmar Georg, Tufve Nyholm
The role of multi-parametric (mp)MRI in the diagnosis and treatment of prostate cancer has increased considerably. An alternative to visual inspection of mpMRI is the evaluation using histogram-based (first order statistics) parameters and textural features (second order statistics). The aims of the present work were to investigate the relationship between benign and malignant sub-volumes of the prostate and textures obtained from mpMR images. The performance of tumor prediction was investigated based on the combination of histogram-based and textural parameters...
August 24, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28836134/brain-explorer-for-connectomic-analysis
#15
Huang Li, Shiaofen Fang, Joey A Contreras, John D West, Shannon L Risacher, Yang Wang, Olaf Sporns, Andrew J Saykin, Joaquín Goñi, Li Shen
Visualization plays a vital role in the analysis of multimodal neuroimaging data. A major challenge in neuroimaging visualization is how to integrate structural, functional, and connectivity data to form a comprehensive visual context for data exploration, quality control, and hypothesis discovery. We develop a new integrated visualization solution for brain imaging data by combining scientific and information visualization techniques within the context of the same anatomical structure. In this paper, new surface texture techniques are developed to map non-spatial attributes onto both 3D brain surfaces and a planar volume map which is generated by the proposed volume rendering technique, spherical volume rendering...
August 23, 2017: Brain Informatics
https://www.readbyqxmd.com/read/28828635/preoperative-prediction-of-sentinel-lymph-node-metastasis-in-breast-cancer-based-on-radiomics-of-t2-weighted-fat-suppression-and-diffusion-weighted-mri
#16
Yuhao Dong, Qianjin Feng, Wei Yang, Zixiao Lu, Chunyan Deng, Lu Zhang, Zhouyang Lian, Jing Liu, Xiaoning Luo, Shufang Pei, Xiaokai Mo, Wenhui Huang, Changhong Liang, Bin Zhang, Shuixing Zhang
OBJECTIVES: To predict sentinel lymph node (SLN) metastasis in breast cancer patients using radiomics based on T2-weighted fat suppression (T2-FS) and diffusion-weighted MRI (DWI). METHODS: We enrolled 146 patients with histologically proven breast cancer. All underwent pretreatment T2-FS and DWI MRI scan. In all, 10,962 texture and four non-texture features were extracted for each patient. The 0.623 + bootstrap method and the area under the curve (AUC) were used to select the features...
August 21, 2017: European Radiology
https://www.readbyqxmd.com/read/28821786/co-registration-of-ex-vivo-surgical-histopathology-and-in-vivo-t2-weighted-mri-of-the-prostate-via-multi-scale-spectral-embedding-representation
#17
Lin Li, Shivani Pahwa, Gregory Penzias, Mirabela Rusu, Jay Gollamudi, Satish Viswanath, Anant Madabhushi
Multi-modal image co-registration via optimizing mutual information (MI) is based on the assumption that intensity distributions of multi-modal images follow a consistent relationship. However, images with a substantial difference in appearance violate this assumption, thus MI directly based on image intensity alone may be inadequate to drive similarity based co-registration. To address this issue, we introduce a novel approach for multi-modal co-registration called Multi-scale Spectral Embedding Registration (MSERg)...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821235/hippocampus-and-amygdala-radiomic-biomarkers-for-the-study-of-autism-spectrum-disorder
#18
Ahmad Chaddad, Christian Desrosiers, Lama Hassan, Camel Tanougast
BACKGROUND: Emerging evidence suggests the presence of neuroanatomical abnormalities in subjects with autism spectrum disorder (ASD). Identifying anatomical correlates could thus prove useful for the automated diagnosis of ASD. Radiomic analyses based on MRI texture features have shown a great potential for characterizing differences occurring from tissue heterogeneity, and for identifying abnormalities related to these differences. However, only a limited number of studies have investigated the link between image texture and ASD...
July 11, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28816914/congenital-hypotonia-in-toddlerhood
#19
Naomi Steiner, Alcy Torres, Arathi Reddy, Marilyn Augustyn
David is a 22-month-old boy who is new to your practice. He recently moved from a rural area in the Midwest. His father is in the United States Air Force, and his mother works as a full-time homemaker. Their household includes 5 older siblings. The family moves every year because of the father's Air Force placement.David was born full-term in Virginia, with no reported pregnancy complications and no alcohol, tobacco, or drug exposure. He was delivered vaginally, with Apgar scores of 7 and 9, respectively and no respiratory issues...
September 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28812015/mri-texture-analysis-of-background-parenchymal-enhancement-of-the-breast
#20
Yasuo Amano, Jun Woo, Maki Amano, Fumi Yanagisawa, Hiroshi Yamamoto, Mayumi Tani
PURPOSE: The purpose of this study was to determine texture parameters reflecting the background parenchymal enhancement (BPE) of the breast, which were acquired using texture analysis (TA). METHODS: We investigated 52 breasts of the 26 subjects who underwent dynamic contrast-enhanced MRI. One experienced reader scored BPE visually (i.e., minimal, mild, moderate, and marked). TA, including 12 texture parameters, was performed to distinguish the BPE scores quantitatively...
2017: BioMed Research International
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