Validation of diffusion measurements obtained on a 0.35T MR in Malawi: Important insights for radiologists in low income settings with low field MRI
To investigate the reliability of diffusion weighted image (DWI) measurements obtained on a 0.35T MR scanner in Malawi for malaria research. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - October 11, 2017 Category: Radiology Authors: Yuchuan Zhuang, Michael J. Potchen, Samuel D. Kampondeni, Madalina Tivarus, Gretchen L. Birbeck, Jianhui Zhong Tags: Original contribution Source Type: research
Model selection for high b-value diffusion-weighted MRI of the prostate
To assess the abilities of the standard mono-exponential (ME), bi-exponential (BE), diffusion kurtosis (DK) and stretched exponential (SE) models to characterize diffusion signal in malignant and prostatic tissues and determine which of the four models best characterizes these tissues on a per-voxel basis. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - October 11, 2017 Category: Radiology Authors: Yousef Mazaheri, Andreas M. H ötker, Amita Shukla-Dave, Oguz Akin, Hedvig Hricak Source Type: research
Automated segmentation of abdominal subcutaneous adipose tissue and visceral adipose tissue in obese adolescent in MRI
To develop a reliable and reproducible automatic technique to segment and measure SAT and VAT based on MRI. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - October 7, 2017 Category: Radiology Authors: Steve C.N. Hui, Teng Zhang, Lin Shi, Defeng Wang, Chei-Bing Ip, Winnie C.W. Chu Tags: Original contribution Source Type: research
Cover 2 -- Editorial Board
(Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - October 5, 2017 Category: Radiology Source Type: research
fm iii and iv -- Contents/Barcode
(Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - October 5, 2017 Category: Radiology Source Type: research
Diffuse gliomas exhibit whole brain impaired cerebrovascular reactivity
Cerebral diffuse gliomas exhibit perilesional impaired cerebrovascular reactivity (CVR), yet the degree of impairment as well as its full spatial extent in the brain remains unknown. With quantitative fMRI, we studied twelve subjects with untreated brain diffuse glioma and twelve healthy controls to assess CVR impairment and determine its distribution throughout the brain. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - October 3, 2017 Category: Radiology Authors: Jorn Fierstra, Christiaan van Niftrik, Marco Piccirelli, Oliver Bozinov, Athina Pangalu, Niklaus Krayenb ühl, Antonios Valavanis, Michael Weller, Luca Regli Tags: Original contribution Source Type: research
A data-oriented self-calibration and robust chemical-shift encoding by using clusterization (OSCAR): Theory, optimization and clinical validation in neuromuscular disorders
Multi-echo Chemical Shift –Encoded (CSE) methods for Fat-Water quantification are growing in clinical use due to their ability to estimate and correct some confounding effects. State of the art CSE water/fat separation approaches rely on a multi-peak fat spectrum with peak frequencies and relative amplitudes kept constant over the entire MRI dataset. However, the latter approximation introduces a systematic error in fat percentage quantification in patients where the differences in lipid chemical composition are significant (such as for neuromuscular disorders) because of the spatial dependence of the peak amplitudes . (...
Source: Magnetic Resonance Imaging - October 2, 2017 Category: Radiology Authors: G. Siracusano, A. La Corte, M. Gaeta, G. Finocchio Tags: Original contribution Source Type: research
Multi-echo reconstruction from partial K-space scans via adaptively learnt basis
In multi-echo imaging, multiple T1/T2 weighted images of the same cross section is acquired. Acquiring multiple scans is time consuming. In order to accelerate, compressed sensing based techniques have been proposed. In recent times, it has been observed in several areas of traditional compressed sensing, that instead of using fixed basis (wavelet, DCT etc.), considerably better results can be achieved by learning the basis adaptively from the data. Motivated by these studies, we propose to employ such adaptive learning techniques to improve reconstruction of multi-echo scans. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - September 27, 2017 Category: Radiology Authors: Jyoti Maggu, Prerna Singh, Angshul Majumdar Source Type: research
Patient-adapted respiratory training: Effect on navigator-triggered 3D MRCP in painful pancreatobiliary disorders
To compare the image quality of navigator-triggered (NT) 3D MR cholangiopancreatography (MRCP) with and without a patient-adapted respiratory training, in clinical patients with painful pancreatobiliary disorders. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - September 26, 2017 Category: Radiology Authors: Liang Zhu, Zhao-yong Sun, Hua-dan Xue, Dong Liu, Tian-yi Qian, Patrick Asbach, Zheng-yu Jin Tags: Original contribution Source Type: research
Histogram analysis parameters identify multiple associations between DWI and DCE MRI in head and neck squamous cell carcinoma
Nowadays, multiparametric investigations of head and neck squamous cell carcinoma (HNSCC) are established. These approaches can better characterize tumor biology and behavior. Diffusion weighted imaging (DWI) can by means of apparent diffusion coefficient (ADC) quantitatively characterize different tissue compartments. Dynamic contrast-enhanced magnetic resonance imaging (DCE MRI) reflects perfusion and vascularization of tissues. Recently, a novel approach of data acquisition, namely histogram analysis of different images is a novel diagnostic approach, which can provide more information of tissue heterogeneity. (Source: ...
Source: Magnetic Resonance Imaging - September 26, 2017 Category: Radiology Authors: Hans Jonas Meyer, Leonard Leifels, Stefan Schob, Nikita Garnov, Alexey Surov Tags: Original contribution Source Type: research
Investigation of 3D reduced field of view carotid atherosclerotic plaque imaging
To investigate the feasibility of using CUBE based reduced field of view imaging in atherosclerotic plaque imaging. Twenty-four patients were enrolled in this prospective study (13 males, 11 females, age 63 ±10). All patients underwent MRI exams consisting of 3D TOF, MPRAGE, iMSDE, DANTE, full FOV and reduced FOV CUBE imaging; 18 patients under went contrast enhanced imaging. The resulting images from different imaging sequences were assessed in terms of blood suppression, SNR, motion artifacts and va scular clarity. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - September 25, 2017 Category: Radiology Authors: Xueyan Xu, Hai Geng, Qiang Zhang, Jianmin Yu, Yujing Chu, Guang Dong, Jun Wu Tags: Original contribution Source Type: research
A new class of cubic SPIONs as a dual-mode T1 and T2 contrast agent for MRI
In this study, we (a) synthesized a new class of cubic SPIONs as a dual-mode contrast agent in MRI and (b) showed the in-vivo feasibility of these nanaoparticles as a simultaneous positive and negative contrast agent. Relaxation properties and contrast enhancement analysis of the synthesized SPIONs with two different shapes (cubic vs. spherical) and three different sizes 7nm, 11nm, and 14nm were investigated to evaluate contrast enhancement in-vitro. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - September 25, 2017 Category: Radiology Authors: Akbar Alipour, Zeliha Soran-Erdem, Mustafa Utkur, Vijay Kumar Sharma, Oktay Algin, Emine Ulku Saritas, Hilmi Volkan Demir Tags: Original contribution Source Type: research
Investigation of 3D reduced field of view carotid atherosclerotic plaque imaging
To investigate the feasibility of using CUBE based reduced field of view imaging in atherosclerotic plaque imaging. Twenty-four patients were enrolled in this prospective study (13 males, 11 females, age 63 ±10). All patients underwent MRI exams consisting of 3D TOF, MPRAGE, iMSDE, DANTE, full FOV and reduced FOV CUBE imaging; 18 patients under went contrast enhanced imaging. The resulting images from different imaging sequences were assessed in terms of blood suppression, SNR, motion artifacts and va scular clarity. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - September 25, 2017 Category: Radiology Authors: Xueyan Xu, Hai Geng, Qiang Zhang, Jianmin Yu, Yujing Chu, Guang Dong, Jun Wu Tags: Original contribution Source Type: research
Modification of population based arterial input function to incorporate individual variation
This technical note describes how to modify a population-based arterial input function to incorporate variation among the individuals. In DCE-MRI, an arterial input function (AIF) is often distorted by pulsated inflow effect and noise. A population-based AIF (pAIF) has high signal-to-noise ratio (SNR), but cannot incorporate the individual variation. AIF variation is mainly induced by variation in cardiac output and blood volume of the individuals, which can be detected by the full width at half maximum (FWHM) during the first passage and the amplitude of AIF, respectively. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - September 25, 2017 Category: Radiology Authors: Harrison Kim Tags: Technical note Source Type: research
A new class of cubic SPIONs as a dual-mode T1 and T2 contrast agent for MRI
In this study, we (a) synthesized a new class of cubic SPIONs as a dual-mode contrast agent in MRI and (b) showed the in-vivo feasibility of these nanaoparticles as a simultaneous positive and negative contrast agent. Relaxation properties and contrast enhancement analysis of the synthesized SPIONs with two different shapes (cubic vs. spherical) and three different sizes 7nm, 11nm, and 14nm were investigated to evaluate contrast enhancement in-vitro. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - September 25, 2017 Category: Radiology Authors: Akbar Alipour, Zeliha Soran-Erdem, Mustafa Utkur, Vijay Kumar Shamra, Oktay Algin, Emine Ulku Saritas, Hilmi Volkan Demir Tags: Original contribution Source Type: research
