Evaluation of Image Quality of a 32-Channel versus a 12-Channel Head Coil at 1.5T for MR Imaging of the Brain

Parikh, P.; Sandhu, Gurpreet S.; Blackham, Kristine A; Coffey, Michael D.; Hsu, Daniel P.; Liu, K.; Jesberger, John A.; Griswold, Mark A.; Sunshine, Jeffrey L.

doi:10.3174/ajnr.a2297

Cited by 34 publications

(29 citation statements)

References 26 publications

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“…First, the brain-anxiety relationship was less clear for Dataset 3, relative to Datasets 1 and 2. The fact that brain data in Dataset 3 were collected using an older 8-channel head coil may have contributed to this discrepancy, as it is suggested that a higher number of channels in a head coil (e.g., 32-channel; Datasets 1 and 2) generally improves dMRI image quality (Parikh et al, 2011). Still, we note that the results from Dataset 3 showed a significant (at uncorrected p < 0.05) inverse correlation between trait anxiety and the right amygdala-lOFC pathway, and other pathways also exhibited a similar trend.…”

Section: Discussionmentioning

confidence: 99%

The Inverse Relationship between the Microstructural Variability of Amygdala-Prefrontal Pathways and Trait Anxiety Is Moderated by Sex

Kim

Brown

Mattek

et al. 2016

Front. Syst. Neurosci.

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Anxiety impacts the quality of everyday life and may facilitate the development of affective disorders, possibly through concurrent alterations in neural circuitry. Findings from multimodal neuroimaging studies suggest that trait-anxious individuals may have a reduced capacity for efficient communication between the amygdala and the ventral prefrontal cortex (vPFC). A diffusion-weighted imaging protocol with 61 directions was used to identify lateral and medial amygdala-vPFC white matter pathways. The structural integrity of both pathways was inversely correlated with self-reported levels of trait anxiety. When this mask from our first dataset was then applied to an independent validation dataset, both pathways again showed a consistent inverse relationship with trait anxiety. Importantly, a moderating effect of sex was found, demonstrating that the observed brain-anxiety relationship was stronger in females. These data reveal a potential neuroanatomical mediator of previously documented functional alterations in amygdala-prefrontal connectivity that is associated with trait anxiety, which might prove informative for future studies of psychopathology.

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Section: Discussionmentioning

confidence: 99%

The Inverse Relationship between the Microstructural Variability of Amygdala-Prefrontal Pathways and Trait Anxiety Is Moderated by Sex

Kim

Brown

Mattek

et al. 2016

Front. Syst. Neurosci.

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“…In addition, specific acquisition parameters, e.g., TE and spatial resolution, and vendor specifications of the pulse sequence may have affected our findings. Technical advances, such as the development of 7T MR imaging systems, have led to an increase in the signalto-noise ratio 26,27 and may improve visualization of vessel structures on MRA images.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Intracranial Dural Arteriovenous Fistulas: Comparison of Unenhanced 3T 3D Time-of-flight MR Angiography with Digital Subtraction Angiography

Azuma

Hirai

Shigematsu

et al. 2015

MRMS

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Purpose: We compared gross characterization of intracranial dural arteriovenous fistulas (DAVFs) between unenhanced 3-tesla 3-dimensional (3D) time-of-flight (TOF) magnetic resonance angiography (MRA) and digital subtraction angiography (DSA).Methods: We subjected 26 consecutive patients with intracranial DAVF to unenhanced 3T 3D TOF MRA and to DSA. Two independent sets of observers inspected the main arterial feeders, fistula site, and venous drainage pattern on MRA and DSA images. Interobserver and intermodality agreements were assessed by k statistics.Results: Interobserver agreement was excellent for fistula site (¬ = 0.919; 95% confidence interval [CI], 0.805 to 1.000), good for main arterial feeders (¬ = 0.711; 95% CI, 0.483 to 0.984), and very good for venous drainage (¬ = 0.900; 95% CI, 0.766 to 1.000). Intermodality agreement was excellent for fistula site (¬ = 0.968; 95% CI, 0.906 to 1.000) and good for main arterial feeder (¬ = 0.809; 95% CI, 0.598 to 1.000) and venous drainage (¬ = 0.837; 95% CI, 0.660 to 1.000).Conclusion: Gross characterization of intracranial DAVF was similar for both imaging modalities, but unenhanced 3T 3D TOF MRA cannot replace DSA.

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“…Compared with the voxel size of 4D-CE-MRA images, the diameter of arterial tumor feeders is often small and the spatial resolution on these images would not be high enough to depict small feeders. Technical advances (eg, 32-channel coil, 7T MR imaging system) further increase the signal intensity-to-noise ratio 16,17 ; these might improve the visualization of arterial feeders on 4D-CE-MRA images.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Brain and Head and Neck Tumors with 4D Contrast-Enhanced MR Angiography at 3T

Nishimura

Hirai²,

Shigematsu³

et al. 2011

AJNR Am J Neuroradiol

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Evaluation of Image Quality of a 32-Channel versus a 12-Channel Head Coil at 1.5T for MR Imaging of the Brain

Cited by 34 publications

References 26 publications

The Inverse Relationship between the Microstructural Variability of Amygdala-Prefrontal Pathways and Trait Anxiety Is Moderated by Sex

The Inverse Relationship between the Microstructural Variability of Amygdala-Prefrontal Pathways and Trait Anxiety Is Moderated by Sex

Evaluation of Intracranial Dural Arteriovenous Fistulas: Comparison of Unenhanced 3T 3D Time-of-flight MR Angiography with Digital Subtraction Angiography

Evaluation of Brain and Head and Neck Tumors with 4D Contrast-Enhanced MR Angiography at 3T

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