Signal-to-noise ratio and parallel imaging performance of commercially available phased array coils in 3.0 T brain magnetic resonance imaging

Yoshida, Tsukasa; Shirata, Kensei; Urikura, Atsushi; Ito, Michitoshi; Nakaya, Yoshihiro

doi:10.1007/s12194-015-0321-6

Cited by 6 publications

(5 citation statements)

References 25 publications

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“…In particular, a CS AF of 4 demonstrated similar SNRs to a SENSE AF of 2, with a reduction in scan time of 40 %. Previous reports showed that higher AFs not only increased noise amplification or the average g factor, but also had a considerable negative influence on the SNR [14,19]. These previous results were similar to our findings showing that the SNR decreased as the AF increased, with either CS or SENSE.…”

Section: Discussionsupporting

confidence: 92%

Analysis of Magnetic Resonance Signals from Diffusion Weighted Imaging using Compressed Sensitivity Encoding Technique

Jang¹,

Han²,

Jeong³

2019

JMAG

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The purpose of this study was to compare image quality between compressed sensitivity encoding (CS) and sensitivity encoding (SENSE) in single-shot turbo spin echo diffusion-weighted imaging (TSE-DWI). Signal-tonoise ratios (SNR), apparent diffusion coefficient (ADC) values, and geometric accuracies were measured with an American College of Radiology head phantom. CS showed a high mean SNR, less variation in ADC values, and reduced imaging acquisition time (21.7 %-39.3 %) compared with SENSE. In addition, there was no significant difference in geometric accuracy between SENSE and CS. In conclusion, in comparison with SENSE TSE-DWI, CS TSE-DWI resulted in a reduced imaging acquisition time and improved SNR, while maintaining image quality.

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Section: Discussionsupporting

confidence: 92%

Analysis of Magnetic Resonance Signals from Diffusion Weighted Imaging using Compressed Sensitivity Encoding Technique

Jang¹,

Han²,

Jeong³

2019

JMAG

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“…19 A previous study demonstrated rapid increases in the average g factors obtained with a 32-channel phased-array coil as AF increased. 20 Therefore, these results suggest that the increase in coil g factors has much influence on the SNR as the shorter TE value.…”

Section: Discussionmentioning

confidence: 79%

Image quality assessment of single-shot turbo spin echo diffusion-weighted imaging with parallel imaging technique: a phantom study

Yoshida¹,

Urikura²,

Shirata³

et al. 2016

BJR

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Objective: This study aimed to evaluate the image quality and apparent diffusion coefficient (ADC) values of single-shot turbo spin echo (TSE) diffusion-weighted (DW) images obtained using a parallel imaging (PI) technique. Methods: All measurements were performed on a 3.0-T whole-body MRI system and 32-channel phased-array coil. Signal-to-noise ratio (SNR) and ADC values were measured with a DW imaging (DWI) phantom comprising granulated sugar and agar. The SNRs were calculated using a subtraction method and compared among TSE-DW images at acceleration factors (AFs) of 1-4. Image blur was visually assessed on TSE-DW images of a pin phantom at AFs of 1-4. The ADC values were calculated using DW images with b 5 0 and 1000 s mm

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“…131,132 The SNR is routinely evaluated in MRI by measuring the signal intensity difference between the region of interest (ROI) and the background. 133…”

Section: Fmrs Protocolmentioning

confidence: 99%

“…131,132 The SNR is routinely evaluated in MRI by measuring the signal intensity difference between the region of interest (ROI) and the background. 133 When MRI is used instead of 2D imaging, volume acquisition can increase the SNR. However, imaging time for spin-echo sequences is longer than GRE sequences.…”

Section: Advanced Mr Techniquesmentioning

confidence: 99%

Functional Magnetic Resonance Spectroscopy of Lactate in Alzheimer Disease: A Comprehensive Review of Alzheimer Disease Pathology and the Role of Lactate

Shirbandi

Rikhtegar

Khalafi

et al. 2023

Topics in Magnetic Resonance Imaging

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Functional 1H magnetic resonance spectroscopy (fMRS) is a derivative of dynamic MRS imaging. This modality links physiologic metabolic responses with available activity and measures absolute or relative concentrations of various metabolites. According to clinical evidence, the mitochondrial glycolysis pathway is disrupted in many nervous system disorders, especially Alzheimer disease, resulting in the activation of anaerobic glycolysis and an increased rate of lactate production. Our study evaluates fMRS with J-editing as a cutting-edge technique to detect lactate in Alzheimer disease. In this modality, functional activation is highlighted by signal subtractions of lipids and macromolecules, which yields a much higher signal-to-noise ratio and enables better detection of trace levels of lactate compared with other modalities. However, until now, clinical evidence is not conclusive regarding the widespread use of this diagnostic method. The complex machinery of cellular and noncellular modulators in lactate metabolism has obscured the potential roles fMRS imaging can have in dementia diagnosis. Recent developments in MRI imaging such as the advent of 7 Tesla machines and new image reconstruction methods, coupled with a renewed interest in the molecular and cellular basis of Alzheimer disease, have reinvigorated the drive to establish new clinical options for the early detection of Alzheimer disease. Based on the latter, lactate has the potential to be investigated as a novel diagnostic and prognostic marker for Alzheimer disease.

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Signal-to-noise ratio and parallel imaging performance of commercially available phased array coils in 3.0 T brain magnetic resonance imaging

Cited by 6 publications

References 25 publications

Analysis of Magnetic Resonance Signals from Diffusion Weighted Imaging using Compressed Sensitivity Encoding Technique

Analysis of Magnetic Resonance Signals from Diffusion Weighted Imaging using Compressed Sensitivity Encoding Technique

Image quality assessment of single-shot turbo spin echo diffusion-weighted imaging with parallel imaging technique: a phantom study

Functional Magnetic Resonance Spectroscopy of Lactate in Alzheimer Disease: A Comprehensive Review of Alzheimer Disease Pathology and the Role of Lactate

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