Stereotactic examination arrangement for conducting magnetic resonance examinations

A stereotactic examination arrangement for a magnetic resonance imaging apparatus, said arrangement comprising:

• holder means for fixing an examination subject in an examination space;
• antenna means for receiving magnetic resonance signals from said examination subject in said examination space, said antenna means having a detection region encompassing said examination space associated therewith;
• marker means disposed in said detection region, and having at least one chamber containing a fluid, for producing a mark visible in a magnetic resonance image of said examination subject generated from said magnetic resonance signals obtained by said antenna means;
• and
• refilling means, for successively filling and emptying said at least one chamber with a first fluid and a second fluid, said refilling means comprising a first reservoir containing said first fluid, a second reservoir containing said second fluid, valve means in fluid communication with said first reservoir, said second reservoir and said at least one chamber for selectively placing one of said first reservoir or said second reservoir in fluid communication with said at least one chamber, first pumping means in fluid communication with said first reservoir for filling said at least one chamber with said first fluid and emptying said first fluid from said at least one chamber when said first reservoir is in fluid communication with said at least one chamber via said valve means, and second pumping means in fluid communication with said second reservoir for filling said at least one chamber with said second fluid and emptying said second fluid from said at least one chamber when said second reservoir is in fluid communication with said at least one chamber via said valve means.