Read by QxMD icon Read

MR texture analysis

Yuan Shao, Zhonghua Chen, Shuai Ming, Qin Ye, Zhenyu Shu, Cheng Gong, Peipei Pang, Xiangyang Gong
Background: Normal-appearing white matter (NAWM) refers to the normal, yet diseased tissue around the white matter hyperintensities (WMH) on conventional MR images. Radiomics is an emerging quantitative imaging technique that provides more details than a traditional visual analysis. This study aims to explore whether WMH could be predicted during the early stages of NAWM, using a textural analysis in the general elderly population. Methods: Imaging data were obtained from PACS between 2012 and 2017. The subjects (≥60 years) received two or more MRI exams on the same scanner with time intervals of more than 1 year...
2018: Frontiers in Aging Neuroscience
(no author information available yet)
OBJECTIVEThe goal of this study was to identify parameters from routine T1- and T2-weighted MR sequences and diffusion tensor imaging (DTI) that best predict the volumetric changes in a meningioma after treatment with Gamma Knife radiosurgery (GKRS).METHODSIn 32 patients with meningioma, routine MRI and DTI data were measured before GKRS. A total of 78 parameters derived from first-level texture analysis of the pretreatment MR images, including calculation of the mean, SD, 2.5th and 97.5th percentiles, and kurtosis and skewness of data in histograms on a voxel-wise basis, were correlated with lesion volume change after a mean follow-up period of 3 years (range 19...
December 1, 2018: Journal of Neurosurgery
Shujun Chen, Guoliang Shao, Feng Shao, Minming Zhang
OBJECTIVE: To evaluate the application of MR diffusion-weighted imaging(DWI) texture features in differentiation of malignant from benign nonpalpable breast lesion for patients with microcalcifications-only in mammography. METHODS: The clinical and MR-DWI data of 61 patients with microcalcifications, who underwent three-dimensional positioning of breast X-ray wire from October 2012 to December 2015 in Zhejiang Cancer Hospital, were retrospectively analyzed, including 38 patients with malignant lesions and 23 patients with benign lesions...
February 25, 2018: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
Collin C Luk, Abdullah Ishaque, Muhammad Khan, Daniel Ta, Sneha Chenji, Yee-Hong Yang, Dean Eurich, Sanjay Kalra
Introduction: Currently, there are no tools that can accurately predict which patients with mild cognitive impairment (MCI) will progress to Alzheimer's disease (AD). Texture analysis uses image processing and statistical methods to identify patterns in voxel intensities that cannot be appreciated by visual inspection. Our main objective was to determine whether MRI texture could be used to predict conversion of MCI to AD. Methods: A method of 3-dimensional, whole-brain texture analysis was used to compute texture features from T1-weighted MR images...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
Shun Zhang, Gloria Chia-Yi Chiang, Rajiv S Magge, Howard Alan Fine, Rohan Ramakrishna, Eileen Wang Chang, Tejas Pulisetty, Yi Wang, Wenzhen Zhu, Ilhami Kovanlikaya
PURPOSE: Texture analysis performed on MR images can detect quantitative features that are imperceptible to human visual assessment. The purpose of this study was to evaluate the feasibility of texture analysis on preoperative conventional MRI to discriminate between histological subtypes in low-grade gliomas (LGGs), and to determine the utility of texture analysis compared to histogram analysis alone. METHODS: A total of 41 patients with LGG, 21 astrocytoma and 20 1p/19q codeleted oligodendroglioma were included in this study...
November 19, 2018: Magnetic Resonance Imaging
P Taourel, E Pages, I Millet, C Bourgier, P Rouanet, W Jacot, P Crochet, D Azria
This review discusses the clinical applications of magnetic resonance imaging (MRI) for the assessment of neo-adjuvant chemotherapy (NAC) indication, axillary lymph node status, preNAC cancer prognosis, early and intermediate response to NAC, and post-NAC residual disease in patients with breast cancer. Contrast-enhanced MRI with analysis of the tumor morphological features and qualitative enhancement kinetics must be considered as the standard method for pre-NAC breast cancer staging and post-NAC residual disease assessment...
December 2018: Critical Reviews in Oncology/hematology
Elias Bachmann, Andrea B Rosskopf, Tobias Götschi, Markus Klarhöfer, Xeni Deligianni, Monika Hilbe, Christian W A Pfirrmann, Jess Gerrit Snedeker, Michael A Fischer
OBJECTIVES: The aim of this study was to quantitatively assess changes in collagen structure using MR T1- and T2*-mapping in a novel controlled ex vivo tendon model setup. MATERIALS AND METHODS: Twenty-four cadaveric bovine flexor tendons underwent MRI at 3 T before and after chemical modifications, representing mechanical degeneration and augmentation. Collagen degradation (COL), augmenting collagen fiber cross-linking (CXL), and a control (phosphate-buffered saline [PBS]) were examined in experimental groups, using histopathology as standard of reference...
November 16, 2018: Investigative Radiology
Jing Zhang, Xinjie Liu, Haiping Zhang, Xiaojing He, Yangyang Liu, Jun Zhou, Dajing Guo
RATIONALE AND OBJECTIVES: To investigate the value of texture analysis and conventional magnetic resonance imaging (MRI) features for predicting the early recurrence (ER) of single hepatocellular carcinoma (HCC) after hepatectomy. MATERIALS AND METHODS: A total of 100 HCC patients were first divided into group A (tumor diameter ≤3 cm) and group B (tumor diameter >3 cm) and then classified into two subgroups with ER or nonearly recurrence. Textural parameters (skewness, kurtosis, uniformity, energy, entropy, and correlation) based on MR images and conventional MRI features were compared between the ER and nonearly recurrence subgroups...
November 10, 2018: Academic Radiology
Tianwen Xie, Qiufeng Zhao, Caixia Fu, Qianming Bai, Xiaoyan Zhou, Lihua Li, Robert Grimm, Li Liu, Yajia Gu, Weijun Peng
PURPOSE: To identify triple-negative (TN) breast cancer imaging biomarkers in comparison to other molecular subtypes using multiparametric MR imaging maps and whole-tumor histogram analysis. MATERIALS AND METHODS: This retrospective study included 134 patients with invasive ductal carcinoma. Whole-tumor histogram-based texture features were extracted from a quantitative ADC map and DCE semi-quantitative maps (washin and washout). Univariate analysis using the Student's t test or Mann-Whitney U test was performed to identify significant variables for differentiating TN cancer from other subtypes...
November 6, 2018: European Radiology
Indra J Das, Kiaran P McGee, Neelam Tyagi, Hesheng Wang
Technical innovations and developments in areas such as disease localization, dose calculation algorithms, motion management and dose delivery technologies have revolutionized radiation therapy resulting in improved patient care with superior outcomes. A consequence of the ability to design and accurately deliver complex radiation fields is the need for improved target visualization through imaging. While CT imaging has been the standard of care for more than three decades, the superior soft tissue contrast afforded by MR has resulted in the adoption of this technology in radiation therapy...
November 30, 2018: British Journal of Radiology
Olga Volotskova, Xuiqi Fang, Michael Keidar, Hersh Chandarana, Indra J Das
PURPOSE: To correlate the dose response and changes in microscopic structures of the radiochromic films exposed to the clinical magnetic field in the range 1.5-3T with standard and flattening filter-free (FFF) photon beams. METHODS: The radiochromic film was cut into 5x5cm2 sheets/samples from one batch. These samples were exposed to a 1.5 Tesla (T) and/or 3T B-field from an MRI scanner using an abdominal sequence for 7 min before and after irradiation with 6 MV and/or 6 MV FFF beams...
October 20, 2018: Medical Physics
Roman M Prechtl, Daniel Wefers, Frank Jakob, Rudi F Vogel
Microbial exopolysaccharides (EPS) like xanthan are widely exploited as natural biopolymers in diverse industrial sectors. In foods, in-situ EPS formation by starter cultures allows the manufacturing of "clean labeled" products with improved textural and nutritional properties. We performed structural analyses of the cell surface-associated EPS produced by Lactobacillus plantarum TMW 1.1478, which is a promising starter culture for fermented foods. Chromatographic analyses and NMR experiments suggested an acetylated heptameric repeating unit comprised of glucose, rhamnose and galactose as major components, whereas analysis of the macromolecular HePS structure suggested an apparent molecular mass of Mr ∼2 × 106 and a root mean square (RMS) radius of ca...
December 15, 2018: Carbohydrate Polymers
Zhenyu Shu, Songhua Fang, Zhongxiang Ding, Dewang Mao, Peipei Pang, Xiangyang Gong
OBJECTIVE: To explore the application value of texture analysis of magnetic resonance images (MRI) in predicting the efficacy of neoadjuvant chemoradiotherapy(nCRT) for rectal cancer. METHODS: A total of 34 rectal cancer patients who were hospitalized at Zhejiang Provincial People's Hospital from February 2015 to April 2017 were prospectively enrolled and received 3.0T MRI examination at pre-nCRT (1 day before nCRT), early stage (at 10-day after nCRT) and middle stage (at 20-day after nCRT)...
September 25, 2018: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
Camila Lopes Vendrami, Yuri S Velichko, Frank H Miller, Argha Chatterjee, Carolina Parada Villavicencio, Vahid Yaghmai, Robert J McCarthy
OBJECTIVE: The objective of this study was to determine whether quantitative texture analysis of MR images would improve the ability to distinguish papillary renal cell carcinoma (RCC) subtypes, compared with analysis of qualitative MRI features alone. MATERIALS AND METHODS: A total of 47 pathologically proven papillary RCC tumors were retrospectively evaluated, with 31 (66%) classified as type 1 tumors and 16 (34%) classified as type 2 tumors. MR images were reviewed by two readers to determine tumor size, signal intensity, heterogeneity, enhancement pattern, margins, perilesional stranding, vein thrombosis, and metastasis...
December 2018: AJR. American Journal of Roentgenology
Su Joa Ahn, Jung Hoon Kim, Sang Joon Park, Seung Tack Kim, Joon Koo Han
PURPOSE: To investigate whether pre-operative gadoxetic acid-enhanced MRI can predict early recurrence after curative resection of single HCC using image features and texture analysis. MATERIALS AND METHODS: 179 patients with single HCC and who underwent pre-operative MRI were included. Two reviewers analyzed MR findings, including the tumor margin, peritumoral enhancement, peritumoral hypointensity on the hepatobiliary phase (HBP), diffusion restriction, capsule, tumoral fat, washout, portal-vein thrombus, signal intensity on HBP, and satellite nodule...
September 18, 2018: Abdominal Radiology
Christian B van der Pol, Andrew Chung, Christopher Lim, Niket Gandhi, Wendy Tu, Matthew D F McInnes, Nicola Schieda
While many institutions perform MRI during the work-up of urinary bladder cancer, others use MRI rarely if at all, possibly due to a variation in the reported staging accuracy and unfamiliarity with the potential benefits of performing MRI. Through increased application of functional imaging techniques including diffusion-weighted imaging (DWI) and dynamic contrast-enhanced (DCE) imaging, there has been a resurgence of interest regarding evaluation of bladder cancer with MRI. Several recent meta-analyses have shown that MRI is accurate at differentiating between ≤T1 and T2 disease (with pooled sensitivity/specificity of ∼90/80%) and differentiating between T2 and ≥T3 disease...
October 2018: Journal of Magnetic Resonance Imaging: JMRI
M Ravanelli, A Grammatica, E Tononcelli, R Morello, M Leali, S Battocchio, G M Agazzi, M Buglione di Monale E Bastia, R Maroldi, P Nicolai, D Farina
BACKGROUND AND PURPOSE: The incidence of Oropharyngeal Squampus Cell Carcinoma (OPSCC) cases is increasing especially in the Western countries due to the spreading of human papilloma virus (HPV) infection. Radiological investigations, MRI in particular, are used in the daily clinical practice to stage OPSCC. The aim of this study was to investigate the association of quantitative MR imaging features including diffusion-weighted imaging and human papillomavirus status in oropharyngeal squamous cell carcinoma...
September 13, 2018: AJNR. American Journal of Neuroradiology
Xiao-Ning Shao, Ying-Jie Sun, Kun-Tao Xiao, Yong Zhang, Wen-Bo Zhang, Zhi-Feng Kou, Jing-Liang Cheng
The diagnosis of dilated cardiomyopathy (DCM) remains a challenge in clinical radiology. This study aimed to investigate whether texture analysis (TA) parameters on magnetic resonance T1 mapping can be helpful for the diagnosis of DCM.A total of 50 DCM cases were retrospectively screened and 24 healthy controls were prospectively recruited between March 2015 and July 2017. T1 maps were acquired using the Modified Look-Locker Inversion Recovery (MOLLI) sequence at a 3.0 T MR scanner. The endocardium and epicardium were drawn on the short-axis slices of the T1 maps by an experienced radiologist...
September 2018: Medicine (Baltimore)
Yan Ren, Xi Zhang, Wenting Rui, Haopeng Pang, Tianming Qiu, Jing Wang, Qian Xie, Teng Jin, Hua Zhang, Hong Chen, Yong Zhang, Hongbing Lu, Zhenwei Yao, Junhai Zhang, Xiaoyuan Feng
BACKGROUND: Noninvasive detection of isocitrate dehydrogenase 1 mutation (IDH1(+)) and loss of nuclear alpha thalassemia/mental retardation syndrome X-linked expression ((ATRX(-)) are clinically meaningful for molecular stratification of low-grade gliomas (LGGs). PURPOSE: To study a radiomic approach based on multiparametric MR for noninvasively determining molecular status of IDH1(+) and ATRX(-) in patients with LGG. STUDY TYPE: Retrospective, radiomics...
September 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
Laura Filograna, Jacopo Lenkowicz, Francesco Cellini, Nicola Dinapoli, Stefania Manfrida, Nicola Magarelli, Antonio Leone, Cesare Colosimo, Vincenzo Valentini
OBJECTIVES: Recently, radiomic analysis has gained attention as a valuable instrument for the management of oncological patients. The aim of the study is to isolate which features of magnetic resonance imaging (MRI)-based radiomic analysis have to be considered the most significant predictors of metastasis in oncological patients with spinal bone marrow metastatic disease. MATERIALS AND METHODS: Eight oncological patients (3 lung cancer; 1 prostatic cancer; 1 esophageal cancer; 1 nasopharyngeal cancer; 1 hepatocarcinoma; 1 breast cancer) with pre-radiotherapy MR imaging for a total of 58 dorsal vertebral bodies, 29 metastatic and 29 non-metastatic were included...
September 6, 2018: La Radiologia Medica
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"