MRI was performed within one week before RFA using a Siemens 3.0 T Skyra MRI scanner. Conventional MRI was performed first, followed by diffusion-weighted imaging, and finally enhanced scanning. The contrast agent for enhanced scanning was gadoxetate disodium (0.1 mL/kg), which was injected through the anterior elbow vein at a rate of 1 mL/s. Quantitative analysis was performed using an MRI workstation, and the regions of interest were manually delineated by full-volume rendering. The lesion edges were manually delineated on the continuous surface of the axial image to ensure that the whole lesion was included, and the apparent diffusion coefficients (ADC) were recorded. The results were averaged after three repeated tests.
3.0 t skyra mri scanner
Manufactured by Siemens
Sourced in Germany
The 3.0 T Skyra MRI scanner is a magnetic resonance imaging device manufactured by Siemens. It operates at a magnetic field strength of 3.0 Tesla, providing high-quality imaging capabilities for medical applications.
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3 protocols using 3.0 t skyra mri scanner
1
Quantitative MRI Analysis of RFA Lesions
2
Resting-state fMRI Acquisition Protocol
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rs-fMRI scans were performed with a Siemens 3.0T Skyra MRI scanner (Siemens; Munich, Germany). A standard birdcage with a 32-channel head coil, along with restraining foam pads, was used to minimize head motion and scanner noise. The participants were told to move as little as possible and keep their eyes closed without falling asleep. After the scan, none of them reported falling asleep during the scanning process. Resting-state functional images were acquired using a gradient echo planar imaging sequence with the following parameters: repeat time = 2,000 ms; echo time = 30 ms; flip angle = 90°, field of view = 224×224 mm; number of slices = 32; slice thickness = 3.0 mm; and volumes = 200. Then, high-resolution T1-weighted structural images were acquired using the MPRAGE sequence (repeat time = 2,530 ms; echo time = 2.98 ms; voxel size = 1×1×1 mm3; field of view = 256×256 mm2; slices = 43; slice thickness = 1 mm).
3
Balb/c Mice Brain Imaging with MRI
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All animal experiments were conducted in accordance with the standard of the Biomedical Research Ethics Committee of West China Hospital of Sichuan University. Female balb/c mice were purchased from Dossy (Chengdu) Experimental Co. All images were acquired by T1-weighted sequences from a siemens 3.0-T skyra MRI scanner equipped with a mouse coil with the following parameters: TE = 13 ms, TR = 500 ms, slice thickness = 1.5 mm, FA = 150°, FoV = 35 mm × 35 mm, acquisition matrix = 192 mm × 192 mm, number of averages = 6.
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