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Abstract #1608

Diagnostic Accuracy and Procedure Times for 37 Navigated Liver Biopsies in a Closed-Bore MRI Environment

Michael Moche1, Susann Heinig1, Gregor Thrmer1, Nikita Garnov1, Jochen Fuchs1, Tim Riedel1, Thomas Kahn1, Harald Busse1

1Diagnostic and Interventional Radiology Department, Leipzig University Hospital, Leipzig, Germany

MRI is the method of choice for the definition of suspect liver lesions that are barely or not seen with ultrasound or CT imaging. A definite diagnosis is often made by histological analysis of biopsy samples. In a cylindrical 60-cm bore MRI, the remaining space is practically too small to guide and place the biopsy instrument inside the magnet. This work uses a previously described navigation solution with virtual real-time needle guidance outside the bore and optimized intermediate control scanning. A diagnostic accuracy of 89% and estimated procedure times below 40 min appear to be tolerable for clinical routine.

Keywords

acceptable access accomplish accuracy accurate adequately allow allows analgesia analyze anatomical anesthesia appear approaches approximate array barely biopsies biopsy bore breath clinical closed coaxial coil compact complication components consent control covered deeper definite described detection device diagnosis diagnostic difficult displayed double drape environment errors establish every examination flexible free front guidance guided hand haste hold holder immediately initial inserted insertion inside instrument integrated intermediate intervention interventions iteratively lesion lesions liver lobe local made magnet marker materials minimize minutes moved navigated navigation navigational needle negative oblique often onto organ outside overlay overview overweight patient patients placed planning position positioning positive potential practically practice preparation previously prior procedure proper properly protocol rapidly real reduced reformatted relatively rendering reproducible required respectively room sample saturated scanner scanners scene screen sedation setup short site slice solution space specialist steps subsequent successfully suspect system table thicknesses training trajectory true underneath underwent varied vibe views virtual virtually written