Patients underwent brain MRI examinations in the supine position using 1.5 T (n = 34) and 3 T (n = 14) MRI systems (Ingenia 1.5T, Ingenia 3T, Achieva 3T: Philips Healthcare, Eindhoven; MAGNETOM Vida 3T: Siemens, Erlangen) with a 32-channel head coil. MRI protocols are summarized in Table 1 . For DSC-MRI, a 15-mL intravenous bolus of gadobenate dimeglumine (Multihance, Bracco diagnostics, Singen, Germany) or gadoteridol (ProHance, Bracco diagnostics) was administered using a power injector through a peripheral arm vein at a flow rate of 5.0 mL/s, followed by a 20-mL saline flush. An additional 5 mL of contrast agent was administered 5 minutes prior to the dynamic perfusion imaging. Pediatric patients received 2 mL/kg of total contrast material (ProHance). The parameters of fast field echo T2*-weighted imaging were as follows: plane, axial; repetitive time, 1500 to 1840 ms; echo time, 30 to 50 ms; number of excitations, 1; slice thickness, 4 to 5 mm; slice increment, 5 to 5.2 mm; field of view, 226 to 235 mm; matrix, 128 × 128 - 144 × 144; flip angle, 40 to 90 degree; dynamic measurements, 40–70.
Magnetom vida 3t
Manufactured by Siemens
Sourced in Germany
MAGNETOM Vida 3T is a magnetic resonance imaging (MRI) system developed by Siemens. It operates at a magnetic field strength of 3 tesla, which enables high-resolution imaging for various medical applications. The core function of MAGNETOM Vida 3T is to provide detailed images of the human body to support healthcare professionals in diagnosis and treatment planning.
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Lab products found in correlation
Ingenia 3t, by Philips (1 mentions)
Prohance, by Bracco (1 mentions)
Multihance, by Bracco (1 mentions)
Achieva 3t, by Philips (1 mentions)
Ingenia 1.5t, by Philips (1 mentions)
Magnetom aera 1.5t scanner, by Siemens (1 mentions)
Magnetom prisma 3t, by Siemens (1 mentions)
Aera 1.5t, by Siemens (1 mentions)
6 protocols using magnetom vida 3t
1
Dynamic Susceptibility Contrast MRI Protocol
2
Multiparametric MRI Assessment of Health
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Participants were scanned at Perspectum Gemini (Oxford: n=338; MAGNETOM Aera 1.5T scanner) and Mayo Clinic (London: n=198; MAGNETOM Vida 3T) (both scanners: Siemens Healthcare, Erlangen, Germany), at baseline and follow-up with multiorgan, multiparametric MRI assessment (total ~40 min duration). All imaging methods were deployed in standard clinical MRI scanners using slightly modified versions of previously published methods11 12 (link) and using short (<14 s) breath-holds except for lung imaging (online supplemental methods 4 and 5 ).
After each visit, participants and if requested their primary care physicians also, received a clinical summary and a report informing on the MRI data, where quantitative metrics were referenced against the healthy control population, and one on the blood biomarker data.
After each visit, participants and if requested their primary care physicians also, received a clinical summary and a report informing on the MRI data, where quantitative metrics were referenced against the healthy control population, and one on the blood biomarker data.
3
Quantitative MRI Mapping of Contrast Agent
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MRI Phantom images were acquired with a 3.0 Tesla (T) magnet machine (MAGNETOM Vida 3 T, Siemens Healthcare, Erlangen, Germany). INV-001 with concentration of 0.125, 0.25, 0.5, and 1.0 mM were prepared in sealed tubes filled with distilled water to minimize image artifacts. To obtain the MR relaxivities (r1 and r2) of the INV-001, T1 (1) and T2 (2) mapping were performed as follows: (1) 8 inversion times (TI) = [20, 100, 200, 400, 800, 1000, 2000, 4000] ms, repetition time (TR) = 4900 ms, echo time (TE) = 7 ms, average = 1, slice thickness = 1.0 mm, matrix size = 96 × 96, and field of view (FOV) = 70 × 60 mm2. (2) 15 TEs = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150] ms, TR = 3000 ms, average = 1, slice thickness = 1.0 mm, matrix size = 96 × 96, and field of view = 70 × 60 mm2. T1 and T2 values were analyzed by drawing regions of interest (ROI) in different tubes for the analysis.
4
Neuromodulation of Subcortical Targets
5
Multiparametric MRI for Prostate Cancer
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mpMRI was performed using a 3-T MRI scanner Siemens MAGNETOM Vida 3 T (Siemens, Munich, Germany) acquiring diffusion-weighted imaging (DWI), dynamic contrast enhancement imaging (DCE), T1-weighted axial and T2-weighted triplanar imaging. All mpMRI images were independently interpreted by four different experienced genitourinary radiologists, with at least 5 years of experience, according to PI-RADS version 2.0. The images were segmented to obtain and record lesion locations and PI-RADS scores.
6
Multimodal MRI Acquisition for Brain Tumor Characterization
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Images were acquired with one of the following MR scanners: Siemens Magnetom Prisma 3T, Siemens Magnetom Vida 3T, Siemens Magnetom Aera 1,5T, Siemens Magnetom Avanto 1,5T or Philips Achieva 3T. Images on which the analysis was based on were acquired with the following sequences: T2-weighted spin-echo, pre-contrast T1-weighted spin-echo, postcontrast T1-weighted spin-echo and T2*-weighted echo-planar DSC perfusion imaging. Parameters such as the slice thickness (4 mm), the gap between the slices (20%) and the table position were the same in all of the sequences for each patient.
The DSC perfusion imaging sequence comprised 60 acquisitions and the scan was performed before, during and after the bolus injection. At the 10 th acquisition the gadolinium-based contrast agent (0.1 mmol/kg of body weight) was injected intravenously at the rate of 6 ml/s and followed immediately with the 30 ml saline flush at the same rate. All injections were performed using an automatic power injector. All axial sections were aligned with pre-contrast T1-weighted images and the entire tumour volume was covered. or
The DSC perfusion imaging sequence comprised 60 acquisitions and the scan was performed before, during and after the bolus injection. At the 10 th acquisition the gadolinium-based contrast agent (0.1 mmol/kg of body weight) was injected intravenously at the rate of 6 ml/s and followed immediately with the 30 ml saline flush at the same rate. All injections were performed using an automatic power injector. All axial sections were aligned with pre-contrast T1-weighted images and the entire tumour volume was covered. or
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