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Texture mri

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https://www.readbyqxmd.com/read/29427064/diagnostic-and-prognostic-value-of-amyloid-pet-textural-and-shape-features-comparison-with-classical-semi-quantitative-rating-in-760-patients-from-the-adni-2-database
#1
Fayçal Ben Bouallègue, Fabien Vauchot, Denis Mariano-Goulart, Pierre Payoux
We evaluated the performance of amyloid PET textural and shape features in discriminating normal and Alzheimer's disease (AD) subjects, and in predicting conversion to AD in subjects with mild cognitive impairment (MCI) or significant memory concern (SMC). Subjects from the Alzheimer's Disease Neuroimaging Initiative with available baseline 18F-florbetapir and T1-MRI scans were included. The cross-sectional cohort consisted of 181 controls and 148 AD subjects. The longitudinal cohort consisted of 431 SMC/MCI subjects, 85 of whom converted to AD during follow-up...
February 9, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29404769/genotype-prediction-of-atrx-mutation-in-lower-grade-gliomas-using-an-mri-radiomics-signature
#2
Yiming Li, Xing Liu, Zenghui Qian, Zhiyan Sun, Kaibin Xu, Kai Wang, Xing Fan, Zhong Zhang, Shaowu Li, Yinyan Wang, Tao Jiang
OBJECTIVES: To predict ATRX mutation status in patients with lower-grade gliomas using radiomic analysis. METHODS: Cancer Genome Atlas (TCGA) patients with lower-grade gliomas were randomly allocated into training (n = 63) and validation (n = 32) sets. An independent external-validation set (n = 91) was built based on the Chinese Genome Atlas (CGGA) database. After feature extraction, an ATRX-related signature was constructed. Subsequently, the radiomic signature was combined with a support vector machine to predict ATRX mutation status in training, validation and external-validation sets...
February 5, 2018: European Radiology
https://www.readbyqxmd.com/read/29404766/pre-treatment-magnetic-resonance-based-texture-features-as-potential-imaging-biomarkers-for-predicting-event-free-survival-in-anal-cancer-treated-by-chemoradiotherapy
#3
Arnaud Hocquelet, Thibaut Auriac, Cynthia Perier, Clarisse Dromain, Marie Meyer, Jean-Baptiste Pinaquy, Alban Denys, Hervé Trillaud, Baudouin Denis De Senneville, Véronique Vendrely
AIM: To assess regular MRI findings and tumour texture features on pre-CRT imaging as potential predictive factors of event-free survival (disease progression or death) after chemoradiotherapy (CRT) for anal squamous cell carcinoma (ASCC) without metastasis. MATERIALS AND METHODS: We retrospectively included 28 patients treated by CRT for pathologically proven ASCC with a pre-CRT MRI. Texture analysis was carried out with axial T2W images by delineating a 3D region of interest around the entire tumour volume...
February 5, 2018: European Radiology
https://www.readbyqxmd.com/read/29397450/segmentation-and-texture-analysis-of-structural-biomarkers-using-neighborhood-clustering-based-level-set-in-mri-of-the-schizophrenic-brain
#4
Manohar Latha, Ganesan Kavitha
OBJECTIVE: Schizophrenia (SZ) is a psychiatric disorder that especially affects individuals during their adolescence. There is a need to study the subanatomical regions of SZ brain on magnetic resonance images (MRI) based on morphometry. In this work, an attempt was made to analyze alterations in structure and texture patterns in images of the SZ brain using the level-set method and Laws texture features. MATERIALS AND METHODS: T1-weighted MRI of the brain from Center of Biomedical Research Excellence (COBRE) database were considered for analysis...
February 3, 2018: Magma
https://www.readbyqxmd.com/read/29389013/texture-analysis-of-cardiac-cine-magnetic-resonance-imaging-to-detect-non-viable-segments-in-patients-with-chronic-myocardial-infarction
#5
Andrés Larroza, María P López-Lereu, José V Monmeneu, Jose Gavara, Francisco J Chorro, Vicente Bodí, David Moratal
PURPOSE: To investigate the ability of texture analysis to differentiate between infarcted non-viable, viable, and remote segments on cardiac cine magnetic resonance imaging (MRI). METHODS: This retrospective study included 50 patients suffering chronic myocardial infarction. The data was randomly split into training (30 patients) and testing (20 patients) sets. The left ventricular myocardium was segmented according to the 17-segment model in both cine and late gadolinium enhancement (LGE) MRI...
February 1, 2018: Medical Physics
https://www.readbyqxmd.com/read/29388236/clear-cell-hidradenoma-characteristic-imaging-features-on-ultrasonography-computed-tomography-and-magnetic-resonance-imaging
#6
Joo Yeon Lee, Byeong Seong Kang, Hyun Seok Shim, In Hye Song, Misung Kim, Sang Hoon Lee, Hye Won Chung, Min Hee Lee, Myung Jin Shin
OBJECTIVES: The purpose of this study was to evaluate the imaging features of clear cell hidradenoma on ultrasonography (US), computed tomography (CT), and magnetic resonance imaging (MRI). METHODS: The radiologic and pathologic databases at 2 medical institutions were searched retrospectively from 2004 to 2016 to identify patients with a diagnosis of clear cell hidradenoma. Ultrasonographic, CT, and MRI features were described, and pathologic specimens were reviewed...
February 1, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29354004/magnetic-resonance-image-texture-analysis-of-the-periaqueductal-gray-matter-in-episodic-migraine-patients-without-t2-visible-lesions
#7
Zhiye Chen, Xiaoyan Chen, Mengqi Liu, Shuangfeng Liu, Shengyuan Yu, Lin Ma
Objective: The periaqueductal gray matter (PAG), a small midbrain structure, presents dysfunction in migraine. However, the precise neurological mechanism is still not well understood. Herein, the aim of this study was to investigate the texture characteristics of altered PAG in episodic migraine (EM) patients based on high resolution brain structural magnetic resonance (MR) images. Materials and Methods: The brain structural MR images were obtained from 18 normal controls (NC), 18 EM patients and 16 chronic migraine (CM) patients using a 3T MR system...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29342064/minimally-manipulated-bone-marrow-concentrate-compared-with-microfracture-treatment-of-full-thickness-chondral-defects-a-one-year-study-in-an-equine-model
#8
Constance R Chu, Lisa A Fortier, Ashley Williams, Karin A Payne, Taralyn M McCarrel, Megan E Bowers, Diego Jaramillo
BACKGROUND: Microfracture is commonly performed for cartilage repair but usually results in fibrocartilage. Microfracture augmented by autologous bone marrow concentrate (BMC) was previously shown to yield structurally superior cartilage repairs in an equine model compared with microfracture alone. The current study was performed to test the hypothesis that autologous BMC without concomitant microfracture improves cartilage repair compared with microfracture alone. METHODS: Autologous sternal bone marrow aspirate (BMA) was concentrated using a commercial system...
January 17, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29341325/characterization-of-adrenal-lesions-on-unenhanced-mri-using-texture-analysis-a-machine-learning-approach
#9
Valeria Romeo, Simone Maurea, Renato Cuocolo, Mario Petretta, Pier Paolo Mainenti, Francesco Verde, Milena Coppola, Serena Dell'Aversana, Arturo Brunetti
BACKGROUND: Adrenal adenomas (AA) are the most common benign adrenal lesions, often characterized based on intralesional fat content as either lipid-rich (LRA) or lipid-poor (LPA). The differentiation of AA, particularly LPA, from nonadenoma adrenal lesions (NAL) may be challenging. Texture analysis (TA) can extract quantitative parameters from MR images. Machine learning is a technique for recognizing patterns that can be applied to medical images by identifying the best combination of TA features to create a predictive model for the diagnosis of interest...
January 17, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29322596/subclinical-depressive-symptoms-during-late-midlife-and-structural-brain-alterations-a-longitudinal-study-of-danish-men-born-in-1953
#10
Merete Osler, Lauge Sørensen, Maarten Rozing, Oriol Puig Calvo, Mads Nielsen, Egill Rostrup
We explored whether depressive symptoms measured three times during midlife were associated with structural brain alterations quantified using magnetic resonance imaging measurements of volume, cortical thickness, and intensity texture. In 192 men born in 1953 with depressive symptoms measured at age 51, 56, and 59 years, magnetic resonance imaging was performed at age 59. All data processing was performed using the Freesurfer software package except for the texture-scores that were computed using in-house software...
January 10, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29322101/a-novel-individual-level-morphological-brain-networks-constructing-method-and-its-evaluation-in-pet-and-mr-images
#11
Jiehui Jiang, Hucheng Zhou, Huoqiang Duan, Xin Liu, Chuantao Zuo, Zhemin Huang, Zhihua Yu, Zhuangzhi Yan
Mapping the human brain is one of the great scientific challenges of the 21st century. Brain network analysis is an effective technique based on graph theory that is widely used to investigate network patterns in the human brain. Currently, mapping an individual brain network using a single image has been a hotspot in the field of brain science; techniques, such as the Kullback-Leibler (KL) method, have applications in structural Magnetic Resonance (MR) imaging. However, maintaining an image's intensity, shape, texture and gradient information during feature extraction is very challenging...
December 2017: Heliyon
https://www.readbyqxmd.com/read/29321645/mri-features-predictive-of-negative-surgical-margins-in-patients-with-her2-overexpressing-breast-cancer-undergoing-breast-conservation
#12
Brittany Z Dashevsky, Jung Hun Oh, Aditya P Apte, Blanca Bernard-Davila, Elizabeth A Morris, Joseph O Deasy, Elizabeth J Sutton
Here we develop a tool to predict resectability of HER2+ breast cancer at breast conservation surgery (BCS) utilizing features identified on preoperative breast MRI. We identified patients with HER2+ breast cancer who obtained pre-operative breast MRI and underwent BCS between 2002-2013. From the contoured tumor on pre-operative MRI, shape, histogram, and co-occurrence and size zone matrix texture features were extracted. In univariate analysis, Spearman's correlation coefficient (Rs) was used to assess the correlation between each image feature and an endpoint (surgical re-excision)...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29314345/differentiation-between-vasogenic-edema-and-infiltrative-tumor-in-patients-with-high-grade-gliomas-using-texture-patch-based-analysis
#13
Moran Artzi, Gilad Liberman, Deborah T Blumenthal, Orna Aizenstein, Felix Bokstein, Dafna Ben Bashat
BACKGROUND: High-grade gliomas (HGGs) induce both vasogenic edema and extensive infiltration of tumor cells, both of which present with similar appearance on conventional MRI. Using current radiological criteria, differentiation between these tumoral and nontumoral areas within the nonenhancing lesion area remains challenging. PURPOSE: To use radiomics patch-based analysis, based on conventional MRI, for the classification of the nonenhancing lesion area in patients with HGG into tumoral and nontumoral components...
January 3, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29311558/radiogenomic-analysis-of-hypoxia-pathway-is-predictive-of-overall-survival-in-glioblastoma
#14
Niha Beig, Jay Patel, Prateek Prasanna, Virginia Hill, Amit Gupta, Ramon Correa, Kaustav Bera, Salendra Singh, Sasan Partovi, Vinay Varadan, Manmeet Ahluwalia, Anant Madabhushi, Pallavi Tiwari
Hypoxia, a characteristic trait of Glioblastoma (GBM), is known to cause resistance to chemo-radiation treatment and is linked with poor survival. There is hence an urgent need to non-invasively characterize tumor hypoxia to improve GBM management. We hypothesized that (a) radiomic texture descriptors can capture tumor heterogeneity manifested as a result of molecular variations in tumor hypoxia, on routine treatment naïve MRI, and (b) these imaging based texture surrogate markers of hypoxia can discriminate GBM patients as short-term (STS), mid-term (MTS), and long-term survivors (LTS)...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29284425/mri-texture-analysis-in-differentiating-luminal-a-and-luminal-b-breast-cancer-molecular-subtypes-a-feasibility-study
#15
Kirsi Holli-Helenius, Annukka Salminen, Irina Rinta-Kiikka, Ilkka Koskivuo, Nina Brück, Pia Boström, Riitta Parkkola
BACKGROUND: The aim of this study was to use texture analysis (TA) of breast magnetic resonance (MR) images to assist in differentiating estrogen receptor (ER) positive breast cancer molecular subtypes. METHODS: Twenty-seven patients with histopathologically proven invasive ductal breast cancer were selected in preliminary study. Tumors were classified into molecular subtypes: luminal A (ER-positive and/or progesterone receptor (PR)-positive, human epidermal growth factor receptor type 2 (HER2) -negative, proliferation marker Ki-67 < 20 and low grade (I)) and luminal B (ER-positive and/or PR-positive, HER2-positive or HER2-negative with high Ki-67 ≥ 20 and higher grade (II or III))...
December 29, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29281150/to-distinguish-flexible-and-rigid-lumbar-curve-from-mri-texture-analysis-in-adolescent-idiopathic-scoliosis-a-feasibility-study
#16
Claudia Chevrefils, Delphine Périé, Stefan Parent, Farida Cheriet
BACKGROUND: Imaging in side bending, supine, traction, fulcrum, and push prone are examples of methods used to evaluate the curve reduction of scoliotic spine. However, being able to determine spine curve flexibility from MRI would eliminate the need of additional X-ray radiation related to radiograph acquisition in side-bending. PURPOSE/HYPOTHESIS: To find specific texture features of lumbar postural muscles on MRI that can distinguish flexible from rigid lumbar scoliotic curves...
December 27, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29274501/using-diffusion-mri-to-discriminate-areas-of-cortical-grey-matter
#17
Tharindu Ganepola, Zoltan Nagy, Aurobrata Ghosh, Theodore Papadopoulo, Daniel C Alexander, Martin I Sereno
Cortical area parcellation is a challenging problem that is often approached by combining structural imaging (e.g., quantitative T1, diffusion-based connectivity) with functional imaging (e.g., task activations, topological mapping, resting state correlations). Diffusion MRI (dMRI) has been widely adopted to analyse white matter microstructure, but scarcely used to distinguish grey matter regions because of the reduced anisotropy there. Nevertheless, differences in the texture of the cortical 'fabric' have long been mapped by histologists to distinguish cortical areas...
December 20, 2017: NeuroImage
https://www.readbyqxmd.com/read/29239394/quantitative-mr-image-analysis-for-brian-tumor
#18
Zeina A Shboul, Sayed M S Reza, Khan M Iftekharuddin
This paper presents an integrated quantitative MR image analysis framework to include all necessary steps such as MRI inhomogeneity correction, feature extraction, multiclass feature selection and multimodality abnormal brain tissue segmentation respectively. We first obtain mathematical algorithm to compute a novel Generalized multifractional Brownian motion (GmBm) texture feature. We then demonstrate efficacy of multiple multiresolution texture features including regular fractal dimension (FD) texture, and stochastic texture such as multifractional Brownian motion (mBm) and GmBm features for robust tumor and other abnormal tissue segmentation in brain MRI...
2018: VipIMAGE 2017 (2017)
https://www.readbyqxmd.com/read/29226824/mdixon-based-texture-analysis-of-an-intraosseous-lipoma-a-case-report-and-current-review-for-the-dental-clinician
#19
Kyung Mi Lee, Hyug-Gi Kim, Yeon-Hee Lee, Eui Jong Kim
An intraosseous lipoma is a rare histologic variant of lipoma, accounting for only 0.1% of all primary bone tumors. This may not be the actual incidence because most of these lesions are frequently asymptomatic, but imaging modalities, such as computed tomography or magnetic resonance imaging (MRI) seem to have increased the detection rate. Lipoma occasionally undergoes osseous metaplasia and becomes an osseous lipoma. Although there are numerous papers discussing intraosseous lipoma and some authors have tried to differentiate lipomas from osseous lipomas, there is still a great deal of confusion with regard to characteristic radiologic features and the use of terms...
December 6, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29222685/prediction-of-outcome-using-pretreatment-18f-fdg-pet-ct-and-mri-radiomics-in-locally-advanced-cervical-cancer-treated-with-chemoradiotherapy
#20
François Lucia, Dimitris Visvikis, Marie-Charlotte Desseroit, Omar Miranda, Jean-Pierre Malhaire, Philippe Robin, Olivier Pradier, Mathieu Hatt, Ulrike Schick
PURPOSE: The aim of this study is to determine if radiomics features from 18fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) and magnetic resonance imaging (MRI) images could contribute to prognoses in cervical cancer. METHODS: One hundred and two patients (69 for training and 33 for testing) with locally advanced cervical cancer (LACC) receiving chemoradiotherapy (CRT) from 08/2010 to 12/2016 were enrolled in this study. 18F-FDG PET/CT and MRI examination [T1, T2, T1C, diffusion-weighted imaging (DWI)] were performed for each patient before CRT...
December 9, 2017: European Journal of Nuclear Medicine and Molecular Imaging
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