1.5t mri

Manufactured by GE Healthcare

Sourced in United States

The 1.5T MRI is a magnetic resonance imaging (MRI) system that uses a 1.5 Tesla (T) static magnetic field to generate images of the human body. It is designed to capture detailed anatomical information by detecting and recording the response of hydrogen protons in the body to the applied magnetic field and radio frequency pulses. The 1.5T MRI provides high-quality images for various clinical applications, including diagnostic imaging of the brain, spine, musculoskeletal system, and other organs. The system's technical specifications and performance characteristics are optimized for efficient and reliable imaging procedures.

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13 protocols using 1.5t mri

Rectal Cancer Staging with Pelvic MRI

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All patients underwent pelvic MRI scans performed with 1.5 T MRI (GE Healthcare) according to the ESGAR guidelines for rectal cancer primary staging [18 (link)]. The protocol included three T2w fast spin echo (FSE) sequences: a sagittal high-resolution sequence, an oblique-axial high-resolution sequence orthogonal to the tumour axis and an oblique-coronal high-resolution sequence parallel to the tumour axis. Diffusion-weighted images (DWIs) were obtained in axial planes using echo-planar imaging (EPI) sequences at three b-values (b0, b600 and b1000 s/mm²), and restriction of diffusion was quantified by the apparent diffusion coefficient (ADC) value. In addition, a T1 axial sequence of the entire pelvis was acquired.
Bowel cleansing was performed with two days of a low-fibre diet and the oral administration of Macrogol-Na-K 14 gr the day before the study.
Technical data are reported in Table 1.

Coppola F., Mottola M., Lo Monaco S., Cattabriga A., Cocozza M.A., Yuan J.C., De Benedittis C., Cuicchi D., Guido A., Rojas Llimpe F.L., D’Errico A., Ardizzoni A., Poggioli G., Strigari L., Morganti A.G., Bazzoli F., Ricciardiello L., Golfieri R, & Bevilacqua A. (2021). The Heterogeneity of Skewness in T2W-Based Radiomics Predicts the Response to Neoadjuvant Chemoradiotherapy in Locally Advanced Rectal Cancer. Diagnostics, 11(5), 795.

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Multimodal MRI Evaluation of Neoadjuvant Chemotherapy

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All patients underwent MRI examinations at the following two time points: 1) prior to the start of chemotherapy and biopsy, and 2) after the last NAC cycles and prior to surgery. Surgery was performed within 1 week (average 3.4 days) after the second MRI examinations.
MR Image acquisition was performed using a 1.5T MRI (GE Signa, Milwaukee, WI, USA). The patient was in prone position, and both breasts were examined with a 4-channel phased-array breast surface coil (GE Medical System, Milwaukee, WI, USA). The following sequences were included: axial fast spin echo (FSE) T1 weighted image (T1WI), sagittal fat-suppressed T2WI, axial short time inversion recovery (STIR), axial diffusion weighted imaging (DWI) with b values at 0 and 1000. With help of the STIR and DWI images, four slices containing the largest part of the lesions were selected. T2 mapping was performed using the parameters of these four slices (including the location, thickness, spacing, and field of view [FOV]). The T2 mapping was performed with the following parameters: FSE sequence, 8 echo, TE: 12.6 - 189.4 ms, TR: 1000 ms, matrix 256 × 256, and one cycle of excitation. The 3D sequence was acquired before and five times successively after intravenous injection of gadolinium chelate (0.1 mmol/kg, Magnevist, Schering).

Liu L., Yin B., Geng D.Y., Lu Y.P, & Peng W.J. (2016). Changes of T2 Relaxation Time From Neoadjuvant Chemotherapy in Breast Cancer Lesions. Iranian Journal of Radiology, 13(3), e24014.

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Disc Degeneration MRI Grading

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An MRI examination was performed 4 weeks and 8 weeks after injection to assess the degree of disc degeneration. 1.5 T MRI (GE HDx, Milwaukee, WI, USA) was used to obtain sagittal T2-weighted images, on which the three groups of model animals were classified from grades I to V according to the modified Thompson score (I means normal; II means slightly decreased signal, but the high signal area decreased significantly; III means moderately decreased signal; and IV means significantly decreased signal intensity).

Xiao Q., Zhao Z., Teng Y., Wu L., Wang J., Xu H., Chen S, & Zhou Q. (2022). BMSC-Derived Exosomes Alleviate Intervertebral Disc Degeneration by Modulating AKT/mTOR-Mediated Autophagy of Nucleus Pulposus Cells. Stem Cells International, 2022, 9896444.

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MRI Assessments of Inflammatory Arthritis

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Wrist, metacarpophalangeal (MCP(2-5)) and metatarsophalangeal (MTP(1-5))-joints on the most painful side at baseline (dominant side in case of symmetric symptoms) were imaged with 1.5TMRI (GE, Wisconsin, USA). Contrast-enhanced T1-weighted Fat Spin Echo (FSE) fatsat sequences of the wrist and MCP were obtained in all patients. In June 2013, instead of axial T1 and T2-weighted FSE fatsat sequences in the axial plane, contrast-enhanced T1-weighted FSE fatsat sequences in both the coronal and axial plane of the MTPs were added to the protocol. Online supplemental file 4 provides a detailed scan and scoring protocol.
All MRIs were scored for synovitis, tenosynovitis and osteitis in line with Rheumatoid Arthritis Magnetic Resonance Imaging Score (RAMRIS) and the method of Haavardsholm (online supplemental file 4). Baseline MRIs were scored by two experienced readers, blinded to any clinical data. MRIs over time were scored by a single reader, with known time order, blinded to any clinical data (including DAS and fatigue). Intraclass correlation coefficients were excellent (≥0.95 for total inflammation score; online supplemental files 5 and 6).

Matthijssen X.M., Wouters F., Sidhu N, & van der Helm - van Mil A.H. (2021). Value of imaging detected joint inflammation in explaining fatigue in RA at diagnosis and during the disease course: a large MRI study. RMD Open, 7(2), e001599.

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Pre-Ablation MRI Assessment

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All patients underwent a pre-ablation diagnostic 1.5T MRI (GE, Milwaukee, WI) to assess the VA size, location and flow characteristics.

Thompson S.M., Callstrom M.R., McKusick M.A, & Woodrum D.A. (2015). Initial results of image-guided percutaneous ablation as second-line treatment for symptomatic vascular anomalies. Cardiovascular and interventional radiology, 38(5), 1171-1178.

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MRI Imaging of Lateral Semicircular Canal

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We used 1.5T MRI (General Electric) as a non irradiating imaging technique, with a T2 3D FastSpin Echo acquisition (scan time = 3 500 ms; echo time = 110 ms; and slice thickness = 0.5 mm). We have used a field of view (i.e. FOV) measuring 180 mm X 180 mm with a slice thickness of 0.6 mm and a matrix of 288 X 288. The resulting voxel sized 0.6 X 0.6 x 0.6 mm³. Further interpolation allows one to reduce the voxel to 0.3 X 0.3 X 0.6 mm³Orientation of the lateral SCC in the parasagittal and the frontal plane was analyzed by two different neuroradiologists blinded to one another and to the study group.

Hitier M., Hamon M., Denise P., Lacoudre J., Thenint M.A., Mallet J.F., Moreau S, & Quarck G. (2015). Lateral Semicircular Canal Asymmetry in Idiopathic Scoliosis: An Early Link between Biomechanical, Hormonal and Neurosensory Theories?. PLoS ONE, 10(7), e0131120.

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Uninjured Knee MRI Acquisition

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In addition to a standard preoperative MRI of the injured knee, a 3D sequence of both the injured and uninjured knee was obtained. The present study was limited to the analysis of the uninjured, contralateral knee. The 3D coronal-oblique sequence was obtained on a 1.5T MRI (General Electric). The plane of the native acquisition was perpendicular to the Blumensaat line. The fast spin echo time was 32 milliseconds, with a repetition time of 2000 milliseconds and a slice thickness of 0.625 mm.

Sivakumaran T., Jaffer R., Marwan Y., Hart A., Radu A., Burman M., Martineau P.A, & Powell T. (2021). Reliability of Anatomic Bony Landmark Localization of the ACL Femoral Footprint Using 3D MRI. Orthopaedic Journal of Sports Medicine, 9(10), 23259671211042603.

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Quantifying Brain Structures with Quantib® ND

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Quantib® ND (quantib.com) is a postprocessing image analysis tool for T1-weighted images, which quantifies the volume of brain tissues and various structures. The automatic analysis consists of segmentation and volume measurements of brain tissues (CSF and sum of GM and white matter [WM]), intracranial volume (ICV), total brain volume, brain lobes (frontal, temporal, parietal, and occipital), cerebellum, and hippocampus. The algorithms for the segmentation are based on studies conducted by Vrooman et al.^{20 (link)} and Fortunati et al.^{21 (link)} The end outputs for each brain structure are total and lateralized volumes in mm³.The lateralized volumes are expressed as a percentage of the total ICV (%ICV). Percentile scores are calculated by comparing %ICV scores with reference centile curves based on a large population of cognitively healthy individuals.^{26 (link)} The reference population consisted of 4,951 people aged 45–95 years from the Rotterdam study, the largest Dutch prospective cohort study, whose scans were acquired on 1.5T MRI (GE Healthcare, US) between 2005 and 2015. The Rotterdam study is described elsewhere in more detail.^{26 (link)} See, for an example, output file from Quantib® ND eAppendix 1, links.lww.com/WNL/C369.

Poos J.M., Grandpierre L.D., van der Ende E.L., Panman J.L., Papma J.M., Seelaar H., van den Berg E., van 't Klooster R., Bron E., Steketee R., Vernooij M.W., Pijnenburg Y.A., Rombouts S.A., van Swieten J, & Jiskoot L.C. (2022). Longitudinal Brain Atrophy Rates in Presymptomatic Carriers of Genetic Frontotemporal Dementia. Neurology, 99(24), e2661-e2671.

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MRI Assessment of Preterm Infants

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Head MRI was performed at 40 weeks corrected age using a 1.5 T MRI (General Electric Company). Abnormalities on MRI at term equivalent were assessed blindly by the scores of white matter and gray matter38 (link). Severely abnormal MRI was defined in this study as PVL or severe dilatation of the lateral ventricles.

Song J., Xu F., Wang L., Gao L., Guo J., Xia L., Zhang Y., Zhou W., Wang X, & Zhu C. (2015). Early amplitude-integrated electroencephalography predicts brain injury and neurological outcome in very preterm infants. Scientific Reports, 5, 13810.

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MRI Neuroimaging Protocol for Brain Studies

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All participants were scanned at baseline and follow-up with a 1.5 T MRI (General Electric Signa, Milwaukee, WI) with the following protocol: a T1-weighted axial 3D Spoiled Gradient Recalled Echo (SPGR): repetition time (TR) = 35 ms, echo time (TE) = 5 ms, Number of Excitations (NEX) = 1, 35° flip angle, 22 × 16.5 cm field of view(FoV), 0.86 × 0.86 mm in-plane resolution, 1.2 to 1.4 mm slice thickness depending on head size, and an interleaved proton density (PD) and T2-weighted (axial dual-echo spin echo PD/T2): TE = 30/80 ms, TR = 3000 ms, NEX = 0.5, 20 × 20 cm FoV, 0.78 × 0.78 mm in-plane resolution, 3 mm slice thickness).

Clancy U., Ramirez J., Chappell F.M., Doubal F.N., Wardlaw J.M, & Black S.E. (2022). Neuropsychiatric symptoms as a sign of small vessel disease progression in cognitive impairment. Cerebral Circulation - Cognition and Behavior, 3, 100041.

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