title: Rapid tip tracking with MRI by a limited projection reconstruction technique.
abstract: To rapidly track invasive devices within MRI systems, a novel approach using a limited projection reconstruction technique is presented. Our method exploits the difference between images reconstructed from a limited number of projections and serves to depict the tip of a needle during its advancement. This method was implemented on a standard MRI system with a radial fast-spin-echo sequence and examined in phantom studies. We demonstrated that the proposed method could track the tip every 300 msec and the tip depicted by the present technique was consistently displaced along the needle by a small distance (5 mm).
authors.affiliation: Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA. simi@image.med.osaka-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Shimizu
authors.forename: R V
authors.initials: RV
authors.lastname: Mulkern
authors.forename: K
authors.initials: K
authors.lastname: Oshio
authors.forename: L P
authors.initials: LP
authors.lastname: Panych
authors.forename: S S
authors.initials: SS
authors.lastname: Yoo
authors.forename: R
authors.initials: R
authors.lastname: Kikinis
authors.forename: F A
authors.initials: FA
authors.lastname: Jolesz
mesh_terms: D005240:Feasibility Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009339:Needles; D019047:Phantoms, Imaging; D015642:Radiology, Interventional / Q000295:instrumentation