Percutaneous MR-guided interventions using an optical Moire Phase tracking system: Initial results.

Kägebein, Urte; Godenschweger, Frank; Armstrong, Brian S. R.; Rose, Georg; Wacker, Frank K.; Speck, Oliver; Hensen, Bennet

doi:10.1371/journal.pone.0205394

by Urte Kägebein, Frank Godenschweger, Brian S. R. Armstrong, Georg Rose, Frank K. Wacker, Oliver Speck, Bennet Hensen

Abstract:

The aim of this study was the development and evaluation of a real-time guidance support using optical Moire Phase Tracking (MPT) for magnetic resonance (MR) guided percutaneous interventions. A gradient echo sequence, capable of real-time position updates by the MPT system, was modified to enable needle guidance based on four rigidly attached MPT markers at the back of a needle. Two perpendicular imaging planes were automatically aligned along the calibrated needle and centered at its tip. For user guidance, additional information about the needle trajectory and the tip to target distance were added as image overlay. Both, images and guiding information were displayed on the in-room monitor to facilitate MR guided interventions. The guidance support was evaluated by four experienced interventional radiologists and four novices targeting rubber O-rings embedded in a custom-made phantom on a 3T wide-bore MRI system (80 punctures). The skin to target time, user error, system error and total error were analyzed. The mean skin to target time was 146s+/-68s with no statistically significant difference between experts and novices. A low mean user error (0.91mm+/-0.43mm), system error (0.53mm+/-0.27mm) and total error (0.99mm+/-0.47mm) was reached in all directions. No statistically significant difference in user error, system error and total error could be found between experts and novices. The presented tracking and image guidance system combined with the user interface offers continuous and interactive control of the imaging plane while puncturing in the magnet enabling accurate real-time feedback for both, experienced and non-experienced users.

Reference:

Percutaneous MR-guided interventions using an optical Moire Phase tracking system: Initial results. (Urte Kägebein, Frank Godenschweger, Brian S. R. Armstrong, Georg Rose, Frank K. Wacker, Oliver Speck, Bennet Hensen), In PloS one, volume 13, 2018.

Bibtex Entry:

@article{kagebein_percutaneous_2018,
	title = {Percutaneous {MR}-guided interventions using an optical {Moire} {Phase} tracking system: {Initial} results.},
	volume = {13},
	issn = {1932-6203 1932-6203},
	doi = {10.1371/journal.pone.0205394},
	abstract = {The aim of this study was the development and evaluation of a real-time guidance support using optical Moire Phase Tracking (MPT) for magnetic resonance (MR) guided percutaneous interventions. A gradient echo sequence, capable of real-time position updates by the MPT system, was modified to enable needle guidance based on four rigidly attached MPT markers at the back of a needle. Two perpendicular imaging planes were automatically aligned along the calibrated needle and centered at its tip. For user guidance, additional information about the needle trajectory and the tip to target distance were added as image overlay. Both, images and guiding information were displayed on the in-room monitor to facilitate MR guided interventions. The guidance support was evaluated by four experienced interventional radiologists and four novices targeting rubber O-rings embedded in a custom-made phantom on a 3T wide-bore MRI system (80 punctures). The skin to target time, user error, system error and total error were analyzed. The mean skin to target time was 146s+/-68s with no statistically significant difference between experts and novices. A low mean user error (0.91mm+/-0.43mm), system error (0.53mm+/-0.27mm) and total error (0.99mm+/-0.47mm) was reached in all directions. No statistically significant difference in user error, system error and total error could be found between experts and novices. The presented tracking and image guidance system combined with the user interface offers continuous and interactive control of the imaging plane while puncturing in the magnet enabling accurate real-time feedback for both, experienced and non-experienced users.},
	language = {eng},
	number = {10},
	journal = {PloS one},
	author = {Kägebein, Urte and Godenschweger, Frank and Armstrong, Brian S. R. and Rose, Georg and Wacker, Frank K. and Speck, Oliver and Hensen, Bennet},
	year = {2018},
	pmid = {30325955},
	pmcid = {PMC6191114},
	pages = {e0205394}
}