scholarly journals Magnetic resonance imaging of adrenal gland: state of the art

Gland Surgery ◽  
2019 ◽  
Vol 8 (S3) ◽  
pp. S223-S232
Author(s):  
Fabiano Vito d’Amuri ◽  
Umberto Maestroni ◽  
Francesco Pagnini ◽  
Umberto Russo ◽  
Elisa Melani ◽  
...  
2019 ◽  
Vol 29 (2) ◽  
pp. 83-94 ◽  
Author(s):  
Chun Xiang Tang ◽  
Steffen E. Petersen ◽  
Mihir M. Sanghvi ◽  
Guang Ming Lu ◽  
Long Jiang Zhang

Lung ◽  
2016 ◽  
Vol 194 (4) ◽  
pp. 501-509 ◽  
Author(s):  
Fernanda Miraldi Clemente Pessôa ◽  
Alessandro Severo Alves de Melo ◽  
Arthur Soares Souza ◽  
Luciana Soares de Souza ◽  
Bruno Hochhegger ◽  
...  

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Alexandra I. Svyatova ◽  
Kirill V. Kovtunov ◽  
Igor V. Koptyug

Abstract The main aim of this article is to provide a state-of-the-art review of the magnetic resonance imaging (MRI) utilization in heterogeneous catalysis. MRI is capable to provide very useful information about both living and nonliving objects in a noninvasive way. The studies of an internal heterogeneous reactor structure by MRI help to understand the mass transport and chemical processes inside the working catalytic reactor that can significantly improve its efficiency. However, one of the serious disadvantages of MRI is low sensitivity, and this obstacle dramatically limits possible MRI application. Fortunately, there are hyperpolarization methods that eliminate this problem. Parahydrogen-induced polarization approach, for instance, can increase the nuclear magnetic resonance signal intensity by four to five orders of magnitude; moreover, the obtained polarization can be stored in long-lived spin states and then transferred into an observable signal in MRI. An in-depth account of the studies on both thermal and hyperpolarized MRI for the investigation of heterogeneous catalytic processes is provided in this review as part of the special issue emphasizing the research performed to date in Russia/USSR.


2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Yudong Zhang ◽  
Jiquan Yang ◽  
Jianfei Yang ◽  
Aijun Liu ◽  
Ping Sun

Aim. It can help improve the hospital throughput to accelerate magnetic resonance imaging (MRI) scanning. Patients will benefit from less waiting time.Task. In the last decade, various rapid MRI techniques on the basis of compressed sensing (CS) were proposed. However, both computation time and reconstruction quality of traditional CS-MRI did not meet the requirement of clinical use.Method. In this study, a novel method was proposed with the name of exponential wavelet iterative shrinkage-thresholding algorithm with random shift (abbreviated as EWISTARS). It is composed of three successful components: (i) exponential wavelet transform, (ii) iterative shrinkage-thresholding algorithm, and (iii) random shift.Results. Experimental results validated that, compared to state-of-the-art approaches, EWISTARS obtained the least mean absolute error, the least mean-squared error, and the highest peak signal-to-noise ratio.Conclusion. EWISTARS is superior to state-of-the-art approaches.


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