| 摘要 |
<p>A system (100) includes an elongate instrument (102) having a long axis (104). The elongate instrument includes a first end portion (106; 202) along the long axis. The elongate instrument further includes a second end portion (108; 208) along the long axis, opposing the first end portion. The elongate instrument further includes an annular location determining device (118) disposed to surround a perimeter of a surface (122; 210) of a sub-region (124; 212) of the first end portion about the long axis. The annular location determining device generates a signal indicative of a three dimensional location of the annular location determining device, which indicates of a three dimensional location of the first end portion.</p> |
