Abstract No. 68: Laser guidance in combination with needle path planning reduces fluoroscopy time and patient radiation dose in cone-beam CT needle interventions

(p 0.10). In the NTUS group the procedure time was 49 55 sec for junior and 42 41 sec for senior radiologist (p 0.70). No second needle puncture was needed in any group. Number of needle redirections needed to reach the target during procedure was significantly (p 0.0001) lower for NTUS (0.5 0.86) than for CUS (1.83 1.26). While number of needle redirection was higher for junior (2.4 1.4) than for senior (1.2 0.79) in the CUS group (p 0.01). There was no difference in needle redirection between junior (0.26 0.79) and senior (0.73 0.88) in the NTUS group (p 0.14). After adjustment for operator experience, procedure time and number of needle redirection remain lower in the NTUS group. Diagnostic was obtained at pathology in all biopsies excepted one biopsy in CUS group. No major complication occurred. Conclusion: Electromagnetic tracked biopsy allows shorter procedure time and lower number of needle redirection whatever the experience of the radiologist performing the biopsy is.