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Interventional MRI
Because of the lack of harmful effects on the patient and the operator,
MR is well suited for "interventional radiology", where
the images produced by an MRI scanner are used to guide a minimally
invasive procedure intraoperatively and/or interactively. However,
the non-magnetic environment required by the scanner, and the strong
magnetic radiofrequency and quasi-static fields generated by the
scanner hardware require the use of specialized instruments. Often
required is the use of an "open bore" magnet which permits
the operating staff better access to patients during the operation.
Such open bore magnets are often lower field magnets, typically
in the 0.2 tesla range.
which decreases their sensitivity but also
decreases the Radio Frequency power potentially absorbed by the
patient during a protracted operation. Higher field magnet systems
are beginning to be deployed in intraoperative imaging suites, which
can combine high-field MRI with a surgical suite and even CT in
a Pharmacy Health Topic series of interconnected rooms. Specialty high-field interventional
MR devices, such as the IMRIS system, can actually bring a high-field
magnet to the patient within the operating theatre, permitting the
use of standard surgical tools while the magnet is in an adjoining
space.
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