| 摘要 |
<p>Fiducials ( 50 ) are disposed in an imaging region ( 14 ) along with a subject. The fiducials are mounted either to the subject itself, a surgical tool ( 52 ), an imaging probe or receive coil ( 80 ), or the like. The fiducials are filled with a liquid or gel of a fluorine 19 (Fl<SUP>19</SUP>) compound which has a resonance frequency that is only 6% off from the resonance frequency of protons. This enables a common transmitter ( 22 ), transmit and receive coils, and receiver ( 34 ) to be utilized for both proton and fluorine 19 imaging. The proton and fluorine resonance signals are separately reconstructed into corresponding image memories ( 42, 64 ). From the positions of the fiducials, a position calculator ( 66 ) determines the position of a fiducial carrying surgical tool or probe relative to the proton image. A depiction of the tool or probe from a look-up table ( 70 ) is appropriately positioned and rotated ( 68 ) and superimposed on the proton image by a video processor ( 44 ).</p> |
