MRI was performed with a Magnetom Avanto fit 1.5 T system from Siemens and an 18-channel body coil. Magtrace® (Endomagnetics Ltd, London, UK) was used as SPIO tracer and is a black-brownish sterile aqueous suspension consisting of carboxydextran-coated particles with a particle size of 60 nm. Magtrace® contains circa 28 mg iron per ml and is intended for subcutaneous use [16 (link), 20 , 21 ].
18 channel body coil
Manufactured by Siemens
Sourced in Germany
The 18-channel body coil is a specialized lab equipment used for radio frequency (RF) signal transmission and reception during magnetic resonance imaging (MRI) procedures. It is designed to generate and receive electromagnetic signals within the human body, enabling the capture of high-quality MRI images for diagnostic and research purposes. The core function of this device is to provide a uniform and efficient means of transmitting and receiving RF signals, contributing to the overall performance and image quality of the MRI system.
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Lab products found in correlation
4 protocols using 18 channel body coil
1
MRI Imaging with Magtrace® Tracer
2
Brachial Plexus MRI Imaging Protocol
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Morphological and diffusion tensor images of the supraclavicular brachial plexus of both sides were acquired on a 3T MR system (MAGNETOM Skyra, Siemens Healthcare, Erlangen, Germany) with a commercially available 64-channel head-neck coil and an 18-channel body coil.
Two DTI data sets were acquired: first, as a standard of reference, ss-DTI images in the axial plane with scan parameters according to current literature and second rs-DTI images in the axial plane with a prototype simultaneous multi-slice RESOLVE technique. Isotropic voxels with diameters of 2.4 mm were acquired with both DTI sequences allowing for multi-planar reformatting. B-values were set to 0 and 900 s/mm2 for both sequences and acquisition time was 6 min 30 sec and 6 min 45 sec for ss-DTI and rs-DTI, respectively.
An isotropic T2-weighted sampling perfection with the application of optimized contrasts using different flip angle evolution (SPACE) sequence with short tau inversion recovery (STIR) fat saturation was performed in the coronal plane for better anatomical orientation. Additional pulse sequences specific parameters are outlined inTable 1 .
Two DTI data sets were acquired: first, as a standard of reference, ss-DTI images in the axial plane with scan parameters according to current literature and second rs-DTI images in the axial plane with a prototype simultaneous multi-slice RESOLVE technique. Isotropic voxels with diameters of 2.4 mm were acquired with both DTI sequences allowing for multi-planar reformatting. B-values were set to 0 and 900 s/mm2 for both sequences and acquisition time was 6 min 30 sec and 6 min 45 sec for ss-DTI and rs-DTI, respectively.
An isotropic T2-weighted sampling perfection with the application of optimized contrasts using different flip angle evolution (SPACE) sequence with short tau inversion recovery (STIR) fat saturation was performed in the coronal plane for better anatomical orientation. Additional pulse sequences specific parameters are outlined in
3
Cardiac MRI Protocol for LA Fibrosis
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CMR scans were performed in a 1.5 Tesla scanner (Aera, Siemens Healthcare, Germany) using an 18-channel body coil. After scout sequences, long axis cine (two-, three- and four-chamber) images were acquired for planning stacks and aid in delineation of chambers. An axial cine stack covering atria and ventricles and a short axis cine stack covering the entire LV were obtained for measurement of LA and LV volumes, respectively (steady-state free precession (SSFP) cine sequences [8 mm; 2 mm gap; 25 phases; field of view (320–360) × 360 adjusted for each patient; matrix size (182–224) × (138–224)] at 10–15 second end-expiratory breath-holds).
LA LGE scans were performed 20 minutes after bolus injection of 0.2 mmol/kg gadobutrol (Gadovist, Bayer, Berlin, Germany), with a maximum of 15 mmol in total. The LA LGE scan consisted of a free-breathing respiration-navigator-gated 3D FLASH sequence with FatSat and ECG-gating (end-atrial diastole, determined from four chamber cine). Typical parameters were: TR/TE 4.67/1.94 ms, bandwidth 300 Hz, inversion time according to scout-sequence (270–310 ms), flip angle 20°, slice thickness 1.5 mm, pixel spacing 0.70 ×0.70 mm and no parallel-imaging.
LA LGE scans were performed 20 minutes after bolus injection of 0.2 mmol/kg gadobutrol (Gadovist, Bayer, Berlin, Germany), with a maximum of 15 mmol in total. The LA LGE scan consisted of a free-breathing respiration-navigator-gated 3D FLASH sequence with FatSat and ECG-gating (end-atrial diastole, determined from four chamber cine). Typical parameters were: TR/TE 4.67/1.94 ms, bandwidth 300 Hz, inversion time according to scout-sequence (270–310 ms), flip angle 20°, slice thickness 1.5 mm, pixel spacing 0.70 ×0.70 mm and no parallel-imaging.
4
MRI Imaging Protocol for Oberlin's Transfer
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The MR imaging was performed on a 3.0 Tesla Siemens Skyra system (Siemens Healthcare, Erlangen, Germany) using commercially available 20-channel head-neck coils as well as an 18-channel body coil (Siemens Healthcare). The imaging protocol included T1-weighted turbo spin echo (TSE) sequences in coronal and transversal orientation, a T2-weighted TSE Dixon sequence in transversal orientation and a T2weighted sampling perfection with application of optimized contrasts using different flip angle evolution/short tau inversion recovery sequence in coronal orientation (see Table 2 for detailed sequence parameters). In addition, a single-shot EPI diffusion sequence with 12 different gradient directions at a b value of 800 s/mm 2 was performed in sagittal orientation with following imaging parameters: repetition time, 6000 ms; echo time, 65 ms; number of slices, 48; spatial resolution, 2.0 Â 2.0 Â 2.0 mm; field of view, 150 Â 84 mm; acquisition time, 7:50 minutes. After all sequences were completed for both arms, IV contrast material (gadoteric acid "Dotarem", Guerbet, Villepinte, France) was administered and a postcontrast T1-weighted TSE sequence with fat saturation in coronal orientation was performed for the arm where the Oberlin's transfer had been performed.
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