All MRI examinations were performed by using a 3.0-T (MAGNETOM Skyra, Siemens Healthineers; SIGNA™ Premier, GE) or 1.5-T (uMR588, Shanghai United Imaging Healthcare) MRI system equipped with a body coil. The MRI sequences and parameters are listed in Supplementary Table 1 . Diffusion-weighted images were obtained by using a navigator-triggered technique at b values of 0, 50, and 800 s/mm2, and the corresponding apparent diffusion coefficient maps based on b values of 0 and 800 s/mm2 were reconstructed.
Umr588
Manufactured by United Imaging
Sourced in Germany
The UMR588 is a multi-purpose diagnostic imaging system designed for general radiography applications. It features a high-frequency generator and a versatile X-ray tube assembly to enable a wide range of imaging techniques. The system is capable of performing various radiographic examinations, including general radiography, fluoroscopy, and specialized procedures. Detailed technical specifications and capabilities are available upon request.
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Lab products found in correlation
3 protocols using umr588
1
MRI Sequence Protocols for Diffusion-Weighted Imaging
2
Multimodal Liver MRI Protocol
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MRI examinations were performed with four 3.0-T systems (MAGNETOM Skyra, Siemens Healthineers; Discovery MR 750, GE Healthcare; SIGNA™ Architect, GE Healthcare; and SIGNA™ Premier, GE Healthcare) and a 1.5-T system (uMR588, United Imaging Healthcare). The MRI protocol included T2-weighted imaging, diffusion-weighted imaging, T1-weighted in-phase and opposed-phase imaging, and T1-weighted dynamic and HBP imaging using gadoxetic acid disodium (Primovist®, Bayer Pharma AG). Details of the MRI technique are provided in Supplementary A1 and Table S1.
3
Comprehensive MRI Imaging Protocol for Clinical Analyses
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All MRI were performed with a 1.5T or 3.0T MR scanner (Signa HDxt or Pioneer, GE, Milwaukee, WI, USA; Skyra, Prisma or Verio, Siemens, Erlangen, Germany; uMR 588, United Imaging, Shanghai, China). Patients lay supinely and breathed freely. The T2-weighted images (T2WI) and contrast-enhanced T1-weighted images (CE-T1WI) were archived for subsequent analysis. The parameters were as follows: for T2WI sequence, slice thickness: 4.0–6.0 mm, matrix: 256/512×256/512, repetition time: 2,015–4,200 ms, and echo time: 72.1–138.2 ms; and for CE-T1WI sequence, slice thickness: 3.0–6.0 mm, matrix: 256/512×256/512, repetition time: 3.51–6.77 ms, and echo time: 1.29–3.21 ms. The contrast agent (Magnevist, Bayer Schering, Berlin, German) was intravenously administrated at a dose of 0.2 mL/kg body weight and an injection rate of 2–3 mL/s.
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