1.5 tesla system

Manufactured by Siemens

Sourced in Germany

The 1.5 Tesla system is a lab equipment product designed for magnetic resonance imaging (MRI) applications. It provides a 1.5 Tesla magnetic field strength for imaging and analysis purposes. The core function of this system is to generate a strong and uniform magnetic field to enable high-quality MRI scans and data acquisition.

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1.5 Tesla MRI system 1.5 Tesla MR system Sonata 1.5 Tesla system Magnetom Symphony 1.5 Tesla system 1.5 Tesla

4 protocols using 1.5 tesla system

MRI Assessment of Active MS Plaques

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In this cross-sectional study, 32 sick people (male = 10, female = 22, range 18 - 38 year-old, average of age: 27 year-old) be subjected to MRI assessment between May 2014, and February 2015 at Chamran Imaging Center, Sanandaj, Iran. MRI imaging was performed using a Siemens, Avanto, 1.5 Tesla system equipped with eight-channel head quadrature coil.
First, images without contrast were obtained, including T2w-FSE, T1w-FSE, FLAIR, SE-EPI (DWI) sequences (see Table 1). Then, 0.1 mmol/kg contrast media
(Gadolinium-based) was injected for each patient; finally, FLAIR and T1w-FSE images (in three planes) were obtained again with 30-minute delay after injection. The related images to our study
were evaluated by two radiologists, and the number of the observed active MS plaques in these sequences was noted. The comparison of observed MS plaques in three different MRI pulse sequences was
provided by ANOVA analysis test (P<0.05), and the amount of agreement between two radiologists has been made with Kappa statistic.

Hoseinipourasl M., Zandkarimi M., Abdolmohammadi J., Sharifi K, & Miraki S. (2018). Evaluation the FLAIR Sensitivity and DWI Post-inject in Comparison with Delayed Enhancement T1w for Better Detection of Active MS Lesions. Journal of Biomedical Physics & Engineering, 8(4), 365-374.

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Diagnostic MRI Protocol for Multiple Sclerosis

Cited 1 time

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Brain scans with a 1.5 Tesla system (Siemens; Erlangen, Germany) were performed every two years. Radiologists involved were blind to the individuals’ diagnosis, EDSS score, age and other demographic and MS-related information. In the present study, we report data from the MRI taken at the first diagnosis. Diagnosis of MS was obtained according to these MRIs. Further, MRIs were evaluated by trained and experienced neurologists responsible for the diagnosis of MS.
The locations of lesions were classified as follows: supratentorial; infratentorial; whole brain. Spinal cord lesions were classified as cervical and thoracic.
Last, the number of gadolinium-enhancing lesions were reported for the brain and the spinal cord.
MRI is part of the first assessment and the assessments every two years, or in case that symptoms worsen unexpectedly and dramatically. MRIs were performed according to MAGNISM consensus guidelines [25 (link)]. The following brain sequences were acquired: Axial; T2W, T2FLAIR, contrast-enhanced-T1W and PD. Sagittal; T2W, STIR, contrast-enhanced-T1W. Further, the following spine sequences were performed: sagittal T2w, STIR, contrast-enhanced T1w. Axial T2w and contrast enhanced T1W.

Mirmosayyeb O., Brand S., Barzegar M., Afshari-Safavi A., Nehzat N., Shaygannejad V, & Sadeghi Bahmani D. (2020). Clinical Characteristics and Disability Progression of Early- and Late-Onset Multiple Sclerosis Compared to Adult-Onset Multiple Sclerosis. Journal of Clinical Medicine, 9(5), 1326.

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Transcranial Direct Current Stimulation on Monkeys

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Monkeys were trained to sit in the monkey chairs during the tDCS processes. The location of brain areas such as M1 of each monkey was verified according to the MRI results (MRI was performed on a 1.5 Tesla system, Siemens, Germany) and marked on the surface of scalp. The devices of tDCS were designed by our lab, and the stimuli intensity or time was adjustable (stimuli intensity was ranged from 0–2.5 mA and stimuli time was ranged from 0–60 min). The anodal and cathode electrodes are saline-soaked square rubber pad with sponge insert (4 cm²). The location for cathode electrode was always on the occipital lobe, but the location for anodal electrode changed according to the experiments (M1, PFC, LT and RT). Before each tDCS treatment, monkeys were barbered and the scalp was cleaned with saline. Conductive paste was applied to the surface of each electrode, and then the electrodes were fixed on the scalp locations with adhesive tapes. The stimuli intensity and time on monkeys was referenced on clinical research and adjusted by the response of monkeys in the preliminary experiments.

Li H., Lei X., Yan T., Li H., Huang B., Li L., Xu L., Liu L., Chen N., Lü L., Ma Y., Xu L., Li J., Wang Z., Zhang B, & Hu X. (2015). The temporary and accumulated effects of transcranial direct current stimulation for the treatment of advanced Parkinson’s disease monkeys. Scientific Reports, 5, 12178.

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Contrast-Enhanced MRV Protocol for Stenosis Evaluation

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Contrast enhanced-MRV was conducted under 1.5 Tesla system (Siemens), and the images were reconstructed using a standard algorithm. The scanning parameters included a 432 × 432 matrix, slice thickness of 1.6 mm, echo time of 1 ms, repetition time of 2.3 ms, and flip angle of 25°. A maximum dose of 20 mL (0.2 mmol/kg) of the gadolinium contrast agent (dimeglumine gadopentetate injection, Beilu Pharmaceutical) was administered using an autoinjector at a rate of 2 mL/s. This was immediately followed by a 20 mL saline flush, employing the same injection parameters. Images were captured in the sagittal plane pre- and post-contrast administration and subsequently reconstructed using a standard algorithm.
The stenotic regions were manually segmented by neuroradiologists who were blinded to the pressure measurement using 3D Slicer (version 4.10.2; http://www.slicer.org). For each patient, three-dimensional (3D) shape features were obtained using the Python-based PyRadiomics package (version 3.0; https://github.com/Radiomics/pyradiomics).

Ma C., Zhu H., Liang S., Chang Y., Mo D., Jiang C, & Zhang Y. (2024). Prediction of Venous Trans-Stenotic Pressure Gradient Using Shape Features Derived From Magnetic Resonance Venography in Idiopathic Intracranial Hypertension Patients. Korean Journal of Radiology, 25(1), 74-85.

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