《磁共振成像》杂志稿约

1 总则1.1概况:《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN 1674-8034,CN11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊,每期80页。本刊被评为“中国科学引文数据库(CSCD)来源期刊”“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国科学引文数据库(CSCD)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。本刊官网网址:www.cjmri.cn。     

《磁共振成像》杂志稿约

1 总则1.1 概况:《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN 1674-8034,CN 11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊,每期80页。本刊被评为“中国科学引文数据库(CSCD)来源期刊”“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国科学引文数据库(CSCD)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。本刊官网网址:www.cjmri.cn。     

《磁共振成像》杂志稿约

1 总则1.1概况:《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN1674-8034,CN11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊,每期80页。本刊被评为“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。本刊官网网址:www.cjmri.cn。本刊只接受通过官网投稿,其他途径投稿无效。     

《磁共振成像》杂志审稿流程和时间

《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN 1674-8034,CN 11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊。本刊被评为“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国科学引文数据库(2013~2018年度CSCD来源刊)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。     

《磁共振成像》杂志是否有快速审稿通道

《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN 1674-8034,CN 11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊。本刊被评为“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国科学引文数据库(2013~2018年度CSCD来源刊)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。自2020年起,本刊发表的论文,可在本刊官网开放获取(Open Access)。本刊官网网址:www.cjmri.cn。     

《磁共振成像》杂志是否有快速审稿通道

《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN 1674-8034,CN 11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊。本刊被评为“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国科学引文数据库(2013~2018年度CSCD来源刊)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。自2020年起,本刊发表的论文,可在本刊官网开放获取(Open Access)。本刊官网网址:www.cjmri.cn。     

《磁共振成像》杂志的投稿途径有哪些

《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN 1674-8034,CN 11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊。本刊被评为“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国科学引文数据库(2013~2018年度CSCD来源刊)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。自2020年起,本刊发表的论文可在本刊官网开放获取(Open Access)。本刊官网网址:www.cjmri.cn。     

《磁共振成像》杂志稿约

1总则1.1概况:《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN1674-8034,CN11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊,每期80页。本刊被评为“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国科学引文数据库(2013-2018年度CSCD来源刊)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。本刊官网网址:www.cjmri.cn。本刊只接受通过官网投稿,其他途径投稿无效。     

《磁共振成像》杂志稿约

1总则1.1概况:《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN 1674-8034,CN 11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊,每期80页。本刊被评为“中国科学引文数据库(CSCD)来源期刊”“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国科学引文数据库(CSCD)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。本刊官网网址:www.cjmri.cn。本刊只接受通过官网投稿,其他途径投稿无效。     

《磁共振成像》杂志稿约(2020年)

1总则1.1概况:《磁共振成像》杂志(Chinese Journal of Magnetic Resonance Imaging,ISSN1674-8034,CN11-5902/R),是由中华人民共和国国家卫生健康委员会主管、中国医院协会和首都医科大学附属北京天坛医院主办的学术期刊,创刊于2010年1月,创刊主编:美国医学科学院外籍院士戴建平教授。现为月刊,每期80页。本刊被评为“中国科技核心期刊”“中国科技论文统计源期刊”“RCCSE中国核心学术期刊(A)”,被美国《化学文摘》(CA)、美国《乌利希期刊指南》、波兰《哥白尼索引》(IC)、中国科学引文数据库(2013~2018年度CSCD来源刊)、中国学术期刊综合评价数据库、中国学术期刊网络出版总库(CNKI数据库)、中文科技期刊数据库(重庆维普数据库)、万方医学数据库等数据库收录。     

An accurate, robust, and computationally efficient navigator algorithm for measuring diaphragm positions.

PURPOSE: The purpose of this study is to develop an improved algorithm for measuring the position of the diaphragm using navigator echoes. METHODS: This algorithm was applied to navigator echo data acquired from 14 cardiac patients. For each patient, 160 navigator echo profiles were acquired across the right hemi-diaphragm along the superior-inferior direction. RESULTS: The accuracy of the proposed edge-detection algorithm was evaluated together with that of the least-squares and linear phase-shift algorithms. The estimated measurement error of the proposed algorithm was approximately two times smaller than that of the least-squares algorithm (Magn Reson Med, 1996:36: 117-123), and was approximately four times smaller than that of the linear phase-shift algorithm (Magn Reson Med, 1999;42:548-553). The computational efficiency of this algorithm was 7.5 times higher than that of the least-squares algorithm and was comparable with that of the linear phase-shift algorithm. CONCLUSION: The presented algorithm is accurate, robust, and computationally efficient in the measurement of the diaphragm position.     

Cross-correlation: an fMRI signal-processing strategy

The discovery of functional MRI (fMRI), with the first papers appearing in 1992, gave rise to new categories of data that drove the development of new signal-processing strategies. Workers in the field were confronted with image time courses, which could be reshuffled to form pixel time courses. The waveform in an active pixel time-course was determined not only by the task sequence but also by the hemodynamic response function. Reference waveforms could be cross-correlated with pixel time courses to form an array of cross-correlation coefficients. From this array of numbers, colorized images could be created and overlaid on anatomical images. An early paper from the authors' laboratory is extensively reviewed here (Bandettini et al., 1993. Magn. Reson. Med. 30:161-173). That work was carried out using the vocabulary of vector algebra. Cross-correlation methodology was central to the discovery of functional connectivity MRI (fcMRI) by Biswal et al. (1995. Magn. Reson. Med. 34:537-541). In this method, a whole volume time course of images is collected while the brain is nominally at rest and connectivity is studied by cross-correlation of pixel time courses.     

A complex way to compute fMRI activation

In functional magnetic resonance imaging, voxel time courses after Fourier or non-Fourier "image reconstruction" are complex valued as a result of phase imperfections due to magnetic field inhomogeneities. Nearly all fMRI studies derive functional "activation" based on magnitude voxel time courses [Bandettini, P., Jesmanowicz, A., Wong, E., Hyde, J.S., 1993. Processing strategies for time-course data sets in functional MRI of the human brain. Magn. Reson. Med. 30 (2): 161-173 and Cox, R.W., Jesmanowicz, A., Hyde, J.S., 1995. Real-time functional magnetic resonance imaging. Magn. Reson. Med. 33 (2): 230-236]. Here, we propose to directly model the entire complex or bivariate data rather than just the magnitude-only data. A nonlinear multiple regression model is used to model activation of the complex signal, and a likelihood ratio test is derived to determine activation in each voxel. We investigate the performance of the model on a real dataset, then compare the magnitude-only and complex models under varying signal-to-noise ratios in a simulation study with varying activation contrast effects.     

Modeling both the magnitude and phase of complex-valued fMRI data

In MRI and fMRI, images or voxel measurement are complex valued or bivariate at each time point. Recently, (Rowe, D.B., Logan, B.R., 2004. A complex way to compute fMRI activation. NeuroImage 23 (3), 1078-1092) introduced an fMRI magnitude activation model that utilized both the real and imaginary data in each voxel. This model, following traditional beliefs, specified that the phase time course were fixed unknown quantities which may be estimated voxel-by-voxel. Subsequently, (Rowe, D.B., Logan, B.R., 2005. Complex fMRI analysis with unrestricted phase is equivalent to a magnitude-only model. NeuroImage 24 (2), 603-606) generalized the model to have no restrictions on the phase time course. They showed that this unrestricted phase model was mathematically equivalent to the usual magnitude-only data model including regression coefficients and voxel activation statistic but philosophically different due to it derivation from complex data. Recent findings by (Hoogenrad, F.G., Reichenbach, J.R., Haacke, E.M., Lai, S., Kuppusamy, K., Sprenger, M., 1998. In vivo measurement of changes in venous blood-oxygenation with high resolution functional MRI at .95 Tesla by measuring changes in susceptibility and velocity. Magn. Reson. Med. 39 (1), 97-107) and (Menon, R.S., 2002. Postacquisition suppression of large-vessel BOLD signals in high-resolution fMRI. Magn. Reson. Med. 47 (1), 1-9) indicate that the voxel phase time course may exhibit task related changes. In this paper, a general complex fMRI activation model is introduced that describes both the magnitude and phase in complex data which can be used to specifically characterize task related change in both. Hypotheses regarding task related magnitude and/or phase changes are evaluated using derived activation statistics. It was found that the Rowe-Logan complex constant phase model strongly biases against voxels with task related phase changes and that the current very general complex linear phase model can be cast to address several different hypotheses sensitive to different magnitude/phase changes.     

A fast and simple method for calibrating the flip angle in hyperpolarized 13C MRS experiments

Hyperpolarized ¹³C Magnetic resonance represents a promising modality for in vivo studies of intermediary metabolism of bio‐molecules and new biomarkers. Although it represents a powerful tool for metabolites spatial localization and for the assessment of their kinetics in vivo, a number of technological problems still limits this technology and needs innovative solutions. In particular, the optimization of the signal‐to‐noise ratio during the acquisitions requires the use of pulse sequences with accurate flip angle calibration, which is performed by adjusting the transmit power in the prescan step. This is even more critical in the case of hyperpolarized studies, because the fast decay of the hyperpolarized signal requires precise determination of the flip angle for the acquisition. This work describes a fast and efficient procedure for transmit power calibration of magnetic resonance acquisitions employing selective pulses, starting from the calibration of acquisitions performed with non‐selective (hard) pulses. The proposed procedure employs a simple theoretical analysis of radiofrequency pulses by assuming a linear response and can be performed directly during in vivo studies. Experimental MR data validate the theoretical calculation by providing good agreement. © 2015 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 45B: 78–84, 2015     

Characterization of a dedicated double loop,endoluminal coil for anal sphincter MR imaging at 1.5 T and 3 T

MRI has proven its usefulness in the prediction of surgical anterior anal repair that cannot be done with the reference endosonographic exam. Conventional endorectal coils are often based on a single loop coil design and do not possess satisfactory radial uniformity which could impede the correct assessment of the anal sphincter. In this study, several double loop endorectal coils were designed, built, and assessed in simulations, on phantoms and in vivo. The optimum was found for a 50°–70° double loop endorectal coil which presents a better radial uniformity especially at close distance from the coil where the SNR is the highest. First in vivo experiments proved enhanced readability of the MR exam for the radiologist. © 2014 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 44B: 39–49, 2014     

Design and simulation of a multilayer Halbach magnet for NMR

Halbach magnet is a type of permanent magnet generating a relatively high and homogeneous magnetic field. It is suitable for Nuclear Magnetic Resonance (NMR) studies of small volume chemical or biological samples. In this article, the model of a Halbach magnet made from an odd number of cylindrical layers is proposed for the first time. Then after the optimization of interlayer distances for odd layers Halbach cylinders, the model is verified by the simulation with a magnet inner radius of 30 mm and an outer radius of 49 mm. Moreover, the disturbance of uniformity in 5 mm DSV (Diameter of Spherical Volume) is presented with errors in magnetic strength and angular variation. As a result, a minimum uniformity of 46 ppm inside a 5 mm DSV is achieved, while it increases practically in the presence of magnetic blocks errors. The good performance of the Halbach magnet with odd layers may find potential applications in NMR. © 2015 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 45B: 134–141, 2015     

Proposal for a permanent magnet system with a constant gradient mechanically adjustable in direction and strength

A design for a permanent magnet system is proposed that generates spatially homogeneous, constant magnetic field gradients, thus creating conditions suitable for MRI without gradient coils and amplifiers. This is achieved by superimposing a weak Halbach quadrupole on a strong Halbach dipole. Rotation of either the quadrupole or the entire magnet assembly can be used to generate two‐dimensional images via filtered backprojection. Additionally, the mutual rotation of two quadrupoles can be used to scale the resulting gradient. If both gradients have identical strength the gradient can even be made to vanish. The concept is demonstrated by analytical considerations and FEM simulations. However, a demonstration on a working prototype is still pending. © 2016 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 46B: 41–48, 2016     

Birdcage coils: Equivalent capacitance and equivalent inductance

Birdcage coil is extensively used in MR systems thanks to its possibility to provide high signal‐to‐ noise ratio and high radiofrequency magnetic field homogeneity that guarantee a large field of view. This work describes how to schematize the birdcage coil in terms of an equivalent inductance and an equivalent capacitance, whose knowledge can be useful for coil design and characterization. In particular, the knowledge of equivalent capacitance and equivalent inductance permits to estimate theoretically coil resonant frequency, quality factors and matching circuit capacitor values in a quick way, while workbench tests permit to estimate coil resistance and sample‐induced resistance. The presented theory is validated for both lowpass and highpass birdcage coils.by using literature data. © 2014 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 44B: 32–38, 2014     

A circuit for synchronizing external stimuli and events to the pulse sequence of a clinical magnetic resonance scanner

Interfacing experiments to a clinical magnetic resonance imaging scanner which require synchronization with an imaging pulse sequence can be challenging unless access to a trigger‐out is available. We present a simple, alternative approach to synchronize an experiment to a scanner using an external trigger to drive the scanner through the peripheral optical pulse rate monitor and cardiac trigger available on most clinical imagers. A trigger circuit and pulse rate monitor interface are described for applying a stimulus in the form of a pulsed voltage to a sample at a specific time in a spin‐echo, echo planar imaging sequence. The apparatus and approach could be used for many other types and numbers of experimental stimuli or events. © 2014 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 44B: 50–52, 2014