TITLE:
Minioptical Navigation System for CT-Guided Percutaneous Liver Procedures
AUTHORS:
David A. Valenti, Louis-Martin Boucher, Giovanni Artho, Christopher von Jako, Tatiana Cabrera
KEYWORDS:
Computerized Navigation; CT-Guided Biopsy; CT-Guided Ablations
JOURNAL NAME:
Advances in Computed Tomography,
Vol.2 No.3,
September
13,
2013
ABSTRACT: Purpose: To evaluate a new miniature optical navigation system for CT-guided
liver interventions. Material and Methods: A two-center, prospective study was performed with four
interventional radiologists. A total of 20 patients had
CT-guided liver biopsy or ablation interventions utilizing the
CT-Guide? navigation system (ActiViews Inc., Wakefield, MA)
between July 2011 and December 2011. The navigation system consists of a
self-adhesive patientsticker printed with coincident colored and radio-opaque
reference markers, a miniature disposable video camera that clips on and off an
interventional instrument, and software loaded on a computer to display the
navigation information. The primary end point was the frequency of a
satisfactory instrument position for the intended intervention. Results: The cohort consisted of 13 males and 7 females
with an average age of 63.1 years (range of 38 to 80). Most of the patients,
70%, underwent CT-guided liver biopsy while the remainder had CT-guided
ablation therapy. The average lesion size was 3.1 cm (range of 1.1 - 6.9 cm). All of the interventions, regardless of lesion size, met the primary end
point of satisfactory instrument positioning. There were no device-related
or unexpected adverse events recorded. Only one patient had a mild adverse event
and it resolved without intervention. Conclusions: This study demonstrated the safety and effectiveness
of the CT-Guide? navigation system for CT-guided
liver interventions, for both biopsies and ablations. The targeting success
rate for a satisfactory intervention was 100% with the system.