Control method for magnetic stereotaxis system
US5654864A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 25, 1994 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Jul 25, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B90/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A control method permits the operation of multiple superconducting magnetic coils so as to move a magnetic object to precisely specified locations within the body under command of a physician-operator observing the motion with live fluoroscopic imaging fused with more detailed preoperative imaging of some other kind. A computer contains the preoperative images and the fluoroscopic images, as well as the means to effect changes in the coil currents so as to accomplish the desired magnetic object motion and positioning. The control method operates the coils in pairs on opposite sides of the body in a manner to minimize the necessary current changes, thus avoiding the quenching of the superconducting coils. Combinations of these pairs can execute motion of the magnetic object in any direction in an impulsive manner and with high precision. The method should function well and provide advantages with coils which are not superconducting as well. The method overcomes the redundance present in the limited constraints given by a simple movement vector by the physician-operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.