All patients underwent 3T MRI (Tim Trio, Siemens Erlangen, Germany) using a 4-channel breast coil (in Vivo, Orlando, FL, USA) while lying in the prone position. The mpMRI protocol is summarized in Table 1 . [26 (link),29 (link)–31 (link)]. According to literature [31 (link)] , the DCE-MRI sequences were isotropic and subsequently reformatted in axial and sagittal plane. Gadoteratemeglumine (Gd-DOTA;Dotarem®, Guerbet, France) was injected intravenously as a bolus (0.1 mmol/kg body weight) using a power injector (Spectris Solaris EP, Medrad, Pittsburgh, PA, USA) at a rate of 4 ml/s, followed by a 20-ml saline flush. The contrast agent was injected 75 s after starting the first coronal T1-weighted VIBE. The total examination time of the mpMRI imaging protocol was 18:40 min.
4 channel breast coil
Manufactured by Siemens
Sourced in Germany
The 4-channel breast coil is a specialized piece of lab equipment designed for magnetic resonance imaging (MRI) applications. It features four receiver channels that enable the simultaneous acquisition of images from multiple areas of the breast. The core function of this coil is to provide high-quality, targeted imaging of the breast tissue to support various clinical and research applications.
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Lab products found in correlation
5 protocols using 4 channel breast coil
1
Multiparametric Breast MRI Imaging Protocol
2
Breast MRI Protocol for Diagnosis
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MR examinations were performed on a 3T Biograph mMR (Siemens Healthcare, Erlangen, Germany) with a dedicated 4-channel breast coil. The imaging protocols included a Turbo inversion recovery magnitude (TIRM) sequence (TR = 4200 ms, TE = 60 ms, TI = 230 ms, FOV = 380 × 380 mm2, resolution = 1.48 × 1.48 mm2, and slice thickness = 4 mm); 6 gradient echo volumetric interpolated breath-hold examination (VIBE) sequences at variable flip angle (FA) for T1 mapping (TR = 5.3 ms, TE = 1.9 ms, FAs = [2°, 5°, 8°, 12°, 15°, 20°], FOV = 356 × 379 mm2, resolution = 1.98 × 1.98 mm2, and slice thickness = 3.6 mm); a dynamic scan with 60 consecutive phases with a VIBE sequence (TR = 5.3 ms, TE = 1.9 ms, FA = 20°, FOV = 356 × 379 mm2, resolution = 1.98 × 1.98 mm2, slice thickness = 3.6 mm, and temporal resolution = 9 s/phase); and a delayed 3D postcontrast fat-suppressed T1-weighted gradient echo sequences (TR = 8.4 ms, TE = 2.5 ms, FOV = 370 × 370 mm2, resolution = 0.82 × 0.82 mm2, and slice thickness = 0.89 mm). Intravenous contrast injection started at the end of the first phase of dynamic scan at a dose of 0.1 mmol/kg of body weight and at the highest rate compatible with patient's age and compliance (up to 5 mL/s)
3
Multiparametric MRI Breast Cancer Protocol
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All MR exams were performed with a 3 T MRI scanner (Tim Trio, Siemens, Erlangen, Germany) using a 4‐channel breast coil (InVivo, Orlando, FL) with the patient positioned in the center of the magnet in the prone position. Patients underwent a standardized multiparametric MRI protocol including T2‐weighted (T2w turbo spin echo) imaging, DWI (readout‐segmented echo planar imaging)1 and DCE T1‐weighted imaging (hybrid high spatial and temporal resolution protocol).30 The MRI sequence parameters for T2‐weighted and DCE‐MRI are summarized in online Table S1 and for DWI in Table S2. DWI was performed before the application of contrast agent with DCE‐MRI. For DCE‐MRI gadoterate meglumine (Dotarem, Guerbet, France) was injected intravenously as a bolus (0.1 mmol/kg body weight) by a power injector (Spectris Solaris, Medrad, Pittsburgh, PA) at 4 mL/s, followed by a 20‐mL saline flush. Contrast agent was injected 75 seconds after starting the first coronal T1‐weighted volumetric interpolated breath‐hold examination sequence. The total examination time was ~18:40 minutes.31
4
Accuracy Assessment of Breast Volume Measurement
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The accuracy and precision of the method were assessed in 14 healthy women who underwent a breast augmentation with fat grafting between 2015 and 2018. The patients were included from the University Hospital Copenhagen, Rigshospitalet, and underwent an MRI examination preoperatively and again within 3 hours after the surgery. The liposuction was performed with a water-jet device, and the fat was centrifuged at 100g for 3 minutes. The fat grafts were injected with the structural fat grafting technique with blunt 14-G cannulas.9 ,10 (link) The postoperative MRI was performed before the fat graft resorption so that the increase in breast volume would be roughly equal to the injected volume. Thereby, we could assess the accuracy of the method by comparing the measured increase in breast volume with the injected fat graft volume. Interobserver and intraobserver variability was assessed between 4 blinded observers (M.H., M.Ø., J.H., M.N.H., and J.H.). The MRI scans were acquired on a 3 Tesla MRI unit (Siemens Magnetom Verio, Erlangen, Germany) with a 4-channel breast coil in a head-first prone position. Parts of the MRI scans have been used in a previous study.6 The software is calibrated for in-phase and out-phase images of a 2-point Dixon sequence.
5
Breast MRI Diffusion Imaging Protocol
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All patients underwent 3 T MRI (Tim Trio, Siemens, Erlangen, Germany) in the prone position using a 4-channel breast coil (In Vivo, Orlando, FL, USA). In premenopausal women, MRI was performed in the second week of the menstrual cycle. Details on the MRI protocol have been previously published [24 (link)]. The DWI protocol included axial three-acquisition trace diffusion-weighted, double-refocused, single-shot echo-planar imaging with inversion recovery fat suppression (TR/TE/TI 13,700/83/220 ms; FOV 340 × 117 mm; 40 slices at 3.5 mm; matrix 192 × 64 (50% oversampling); two b values of 50 and 850 s/mm2; bandwidth 1446 Hz/pixel; 3:19 min).
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