All imaging was performed on a 1.5 T MAGNETOM Avanto MR system (Siemens Healthcare, Erlangen, Germany) using a phased-array head coil (intracranial tumours) or a phased-array body coil (extracranial tumours). DWI was performed during the routine MRI scan, and repeated after 24 h with no intervention. A free-breathing DWI protocol using a multi-slice, single-shot echo-planar imaging (EPI) sequence was used with the following parameters: TE 75 ms; TR 3500 ms; matrix 128×128 (interpolated to 256 × 256); 24 contiguous 5-mm slices; generalised autocalibrating partially parallel acquisition (GRAPPA) acceleration factor 2; spectral adiabatic inversion-recovery (SPAIR) fat suppression, and three signal averages. Diffusion b values of 0, 50, 100, 300, 600, and 1000 mm−2 s were applied in three orthogonal directions (50 mm−2 s being the minimum increment at the time of protocol design), and isotropic trace images calculated. The intracranial field of view was 220 × 220 mm2 transverse, the extracranial field of view was 300 × 300 mm2 coronal. The imaging volume was centred through the target lesion, and the total time for the DWI protocol was 6 min.
Magnetom avanto mr system
Manufactured by Siemens
Sourced in Germany
The MAGNETOM Avanto MR system is a magnetic resonance imaging (MRI) device manufactured by Siemens. It is designed to provide high-quality diagnostic imaging for medical professionals. The system utilizes powerful superconducting magnets and advanced imaging technology to generate detailed images of the human body, which can aid in the diagnosis and monitoring of various medical conditions.
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Lab products found in correlation
2 protocols using magnetom avanto mr system
1
Diffusion-Weighted Imaging of Intracranial and Extracranial Tumors
2
MRI Characterization of Uterine Fibroids
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Every patient underwent an MRI examination before HIFU treatment. All MRI examinations were performed using a 1.5 T Magnetom Avanto MR system (Siemens Healthcare, Erlangen, Germany). Standardized parameters used for T1 weighted image (T1WI) were as follows: TR/400-800ms, TE/ 9.4-11ms, voxel size 1.7 Â 1.3 Â 5.0 mm, slice thickness 4 mm. Standardized parameters used for T2WI were as follows: TR/ 3000-6000ms, TE/75-108ms, voxel size 1.0 Â 1.0 Â 4.0 mm, slice thickness 4 mm. Standardized parameters for contrastenhanced MRI (T1-volumetric interpolated body examination -fat suppression, Tl-VIBE-FS) were as follows: TR/4.9-5.8 ms, TE/2.3-2.7 ms, voxel size 1.7 Â 1.2 Â 4.0 mm, slice thickness 4 mm.
Uterine fibroids were classified into three types based on the signal intensity of T2WI in the uterine fibroids and surrounding tissues. Hypointense fibroids: the signal intensity of uterine fibroids on T2WI was lower than or equal to that of skeletal muscle; isointense fibroids: the signal intensity of uterine fibroids on T2WI was higher than that of skeletal muscle but lower than that of the myometrium; hyperintense fibroids: the signal intensity of uterine fibroids on T2WI was equal to or higher than the myometrium [14] .
Uterine fibroids were classified into three types based on the signal intensity of T2WI in the uterine fibroids and surrounding tissues. Hypointense fibroids: the signal intensity of uterine fibroids on T2WI was lower than or equal to that of skeletal muscle; isointense fibroids: the signal intensity of uterine fibroids on T2WI was higher than that of skeletal muscle but lower than that of the myometrium; hyperintense fibroids: the signal intensity of uterine fibroids on T2WI was equal to or higher than the myometrium [14] .
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