Magnetic resonance imaging interference immune device

Details Magnetic resonance imaging interference immune device Magnetic resonance imaging interference immune device

H - Electricity

05

K

H05K 9/00 (2006.01) A61B 5/0424 (2006.01) A61N 1/05 (2006.01) A61N 1/37 (2006.01) G01R 33/36 (2006.01) G01R 33/48 (2006.01)

Patent

CA 2517771

A voltage compensation unit (410 or Figure 12) reduces the effects of induced voltages upon a device having a single wire line. The single wire line has balanced characteristic impedance. The voltage compensation unit includes a tunable compensation circuit (700 of Figure 20) connected to the wire line. The tunable compensation circuit (700 of Figure 20) applies supplemental impedance to the wire line. The supplemental impedance causes the characteristic impedance of the wire line to become unbalanced, thereby reducing the effects of induced voltages caused by changing magnetic fields.

L'invention concerne une unité de compensation de tension (réf. 410 de la fig. 12) réduisant les effets de tensions induites sur un dispositif comprenant une ligne métallique unique. Cette ligne métallique unique possède une impédance caractéristique équilibrée. Ladite unité de compensation de tension comprend un circuit de compensation accordable (réf. 700 de la fig. 20) connecté au conducteur métallique. Ce circuit de compensation accordable (réf. 700 de la fig. 20) applique une impédance additionnelle à la ligne métallique. Cette impédance additionnelle entraîne un déséquilibre de l'impédance caractéristique de la ligne métallique, ce qui réduit les effets de tensions induites dus aux variations de champs magnétiques.

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