Timing of mri data acquisition involving implantable medical...

G - Physics – 01 – R

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G01R 33/567 (2006.01)

Patent

CA 2539553

The invention is directed to techniques in which magnetic resonance imaging (MRI) is coordinated with the operation of an implantable medical device (IMD). By using an IMD to sense conditions, MRI can be improved because the sensed conditions can accurately define timing for application of electromagnetic radiation bursts. Moreover, by applying stimulation pulses specifically to coordinate the electromagnetic radiation bursts, the MRI may also be improved. In one embodiment, a cardiac pacemaker is used to sense the ECG of the subject and transmit the ECG to the MRI scanner. Moreover, the pacemaker may be used to alter the heart frequency of the subject (e.g. induction of arrhythmia).

L'invention concerne des techniques destinées à coordonner une imagerie par résonance magnétique (IRM) avec le fonctionnement d'un dispositif médical implantable (DMI). L'utilisation d'un DMI pour détecter des conditions permet d'améliorer l'IRM étant donné que les conditions détectées peuvent définir avec précision la synchronisation pour l'application de rafales de rayonnement électromagnétique. En outre, l'application d'impulsions de stimulation spécifiquement pour coordonner les rafales de rayonnement électromagnétique permet également d'améliorer l'IRM. Dans un mode de réalisation, on utilise un stimulateur cardiaque pour détecter l'ECG du sujet et transmettre cet ECG au dispositif de balayage d'IRM. De plus, ce stimulateur peut être utilisé pour modifier la fréquence cardiaque du sujet (par ex., induction d'une arythmie).

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