7 t mri

Manufactured by Siemens

The 7 T MRI is a magnetic resonance imaging (MRI) scanner that operates at a field strength of 7 Tesla. It is designed to provide high-resolution imaging of the human body for research and clinical applications.

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7 T MRI scanner 7.0-T whole-body MRI scanner

2 protocols using 7 t mri

Surgical Removal of Primary Visual Cortex

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After several months of pre-lesional training (described above), the left V1 of one monkey (monkey T) and right V1 of two monkeys (monkeys C and U) were surgically removed by aspiration with a suction tube, as described previously^{8 (link)} (Fig. 1). The lesion extent was confirmed on the postmortem brain fixed with 4% paraformaldehyde in Nissl-stained parasagittal sections for monkey T and with T1 imaging using 7 T MRI (Siemens) for monkeys C and U (Supplementary Fig. 1). The opercular surface of V1 was removed, except for its ventrolateral part representing the foveal region. The posterior half of the calcarine fissure was also aspirated. Thus, the cortical area representing 2–30° eccentricities in the contralateral visual field was removed.

Kato R., Hayashi T., Onoe K., Yoshida M., Tsukada H., Onoe H., Isa T, & Ikeda T. (2021). The posterior parietal cortex contributes to visuomotor processing for saccades in blindsight macaques. Communications Biology, 4, 278.

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7T MRI Imaging of Lumbar Disc Degeneration

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Male lumbar motion segments (n = 22) from nine human cadavers (age 60.9 ± 10.2 years; range 42–75 years, levels L1–L2 to L5–S1) were imaged using a Siemens 7T MRI, as in^{23 (link)} (Table 1). Both the superior and inferior CEP from each disc were imaged in 22 motion segments, although 1 segment only had 1 discernible endplate (n = 43 total CEP). Disc degeneration was graded using the Pfirrmann scoring system and by T2 relaxation time of the nucleus pulposus.^{14 (link),24 (link)} Pfirrmann grade 2 was classified as non-degenerate while grades 3–4 were classified as degenerate. No grades 1 or 5 discs were present in the data set or used in this study. Enhancement of CEP contrast was achieved using a previously developed 200 × 200 × 200µm³ 3D FLASH MRI technique. Imaging parameters were TR = 9ms, TE = 3.7ms, flip angle = 20°.^{23 (link)}

DeLucca J.F., Peloquin J.M., Smith L.J., Wright A.C., Vresilovic E.J, & Elliott D.M. (2016). MRI Quantification of Human Spine Cartilage Endplate Geometry: Comparison With Age, Degeneration, Level, and Disc Geometry. Journal of orthopaedic research : official publication of the Orthopaedic Research Society, 34(8), 1410-1417.

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