scholarly journals Komparacija detektabilnosti mozdanih lezija u multipleks sklerozi pri pregledu magnetnom rezonancijom jacine magnetnog polja 1.0 i 3.0 Tesla

2007 ◽  
Vol 54 (3) ◽  
pp. 115-117 ◽  
Author(s):  
T.L. Stosic-Opincal ◽  
M. Gavrilov ◽  
S. Lavrnic ◽  
R. Milenkovic ◽  
V. Peric ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Spin Echo ◽  
Relative Sensitivity ◽  
Brain Lesions ◽  
Lesion Detection ◽  
Focal Lesion ◽  
Gadolinium Contrast ◽  
Contrast Enhanced ◽  
Fluid Attenuated Inversion Recovery ◽  
3.0 T

To estimate the relative sensitivity of MR examination for brain lesions in multiple sclerosis at 1.0 Tesla (T) and 3.0 T using identical acquisition conditions. 54 patients with multiple sclerosis were examined both at 1.0T (Siemens Impact Expert) and 3.0T (Philips Intera) using T1-weighted spin echo (T1W-SE) with and without gadolinium contrast injections, T2W SE and fluid attenuated inversion recovery (FLAIR) imaging. Images were examined independently by three experienced neuroradiologists using focal lesion counting. 3.0T scans compared with 1.0T scans demonstrate a 27.3%, increase in the number of detected contrast enhanced lesions and an 22.7% increase in the number of detected lesions on FLAIR MR tomograms. High field 3.0T MR imaging demonstrates better sensitivity in the detection of focal brain lesions in multiple sclerosis. This improvement is more apparent in contrast enhanced lesion detection and less noticeable in FLAIR detected lesions.

Multi-Contrast, Isotropic, Single-Slab 3D MR Imaging in Multiple Sclerosis

2009 ◽  
Vol 22 (1_suppl) ◽  
pp. 33-42
Author(s):  
Bastiaan Moraal ◽  
Stefan D. Roosendaal ◽  
Petra J. W. Pouwels ◽  
Hugo Vrenken ◽  
Ronald A. van Schijndel ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Spin Echo ◽  
Brain Lesions ◽  
Lesion Detection ◽  
Inversion Recovery ◽  
Rapid Acquisition ◽  
Fluid Attenuated Inversion Recovery ◽  
Student’S T ◽  
3D Sequences ◽  
3D Flair

To describe signal and contrast properties of an isotropic, single-slab 3D dataset [double inversion-recovery (DIR), fluid-attenuated inversion recovery (FLAIR), T2, and T1-weighted magnetization prepared rapid acquisition gradient-echo (MPRAGE)] and to evaluate its performance in detecting multiple sclerosis (MS) brain lesions compared to 2D T2-weighted spin-echo (T2SE). All single-slab 3D sequences and 2D-T2SE were acquired in 16 MS patients and 9 age-matched healthy controls. Lesions were scored independently by two raters and characterized anatomically. Two-tailed Bonferroni-corrected Student's t-tests were used to detect differences in lesion detection between the various sequences per anatomical area after log-transformation. In general, signal and contrast properties of the 3D sequences enabled improved detection of MS brain lesions compared to 2D-T2SE. Specifically, 3D-DIR showed the highest detection of intracortical and mixed WM-GM lesions, whereas 3D-FLAIR showed the highest total number of WM lesions. Both 3D-DIR and 3D-FLAIR showed the highest number of infratentorial lesions. 3D-T2 and 3D-MPRAGE did not improve lesion detection compared to 2D-T2SE. Multi-contrast, isotropic, single-slab 3D MRI allowed an improved detection of both GM and WM lesions compared to 2D-T2SE. A selection of single-slab 3D contrasts, for example, 3D-FLAIR and 3D-DIR, could replace 2D sequences in the radiological practice.

scholarly journals MRI detection of hypointense brain lesions in patients with multiple sclerosis: T1 spin-echo vs. gradient-echo

2015 ◽  
Vol 84 (8) ◽  
pp. 1564-1568 ◽  
Author(s):  
Sheena L. Dupuy ◽  
Shahamat Tauhid ◽  
Gloria Kim ◽  
Renxin Chu ◽  
Subhash Tummala ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Spin Echo ◽  
Brain Lesions ◽  
Gradient Echo

scholarly journals The Feasibility of a Fast Liver MRI Protocol for Lesion Detection of Adults at 3.0-T

2021 ◽  
Vol 11 ◽  
Author(s):  
Jing Li ◽  
Chao Ma ◽  
Yukun Chen ◽  
Caixia Fu ◽  
Xinrui Wang ◽  
...  
Keyword(s):  
Spin Echo ◽  
Lesion Detection ◽  
Concordance Rate ◽  
Fast Spin Echo ◽  
Liver Mri ◽  
Phase Gradient ◽  
Spin Echo Sequence ◽  
Mri Protocol ◽  
3.0 T ◽  
Diagnostic Concordance

PurposeTo investigate the feasibility of a fast liver magnetic resonance imaging (MRI) protocol for lesion detection in adults using 3.0-T MRI.MethodsA fast liver MRI exam protocol was proposed. The protocol included motion-resistant coronal T2-w sequence, axial T2-w fast spin echo sequence with fat suppression, axial in-op phase gradient recalled echo (GRE) T1, axial diffusion weighted imaging (DWI), and axial contrast-enhanced T1 sequences. To evaluate the diagnostic capacity of the proposed protocol, 31 consecutive patients (20 males and 11 females; mean age, 53.2 years) underwent a liver MRI exam with conventional sequences, including the proposed protocol as a subset. Images from the conventional protocol and extracted abbreviated protocol were independently read, and the diagnostic concordance rate was assessed for each patient. The concordance analysis is presented as the proportion of concordant cases between the two protocols.ResultsThe net measurement time of the fast liver MRI protocol without adjustment and waiting time were 4 min and 28 s. In the 31 patients included in this study, 139 suspicious findings were found from both the conventional liver MR protocol and the fast liver MRI protocol. The diagnostic concordance rate was 96.4%.ConclusionsThe fast liver MRI protocol is feasible at 3.0-T, with a shorter exam time and high diagnostic concordance compared to the conventional liver MRI workflow.

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