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Abstract
The aim of our study was to assess the efficacy of a computed tomography (CT)-Navigation™ electromagnetic system compared to conventional CT methods for percutaneous lung biopsies (PLB). In this single-center retrospective study, data of a CT-Navigation™ system guided PLB (NAV-group) and conventional CT PLB (CT-group) performed between January 2017 and February 2020 were reviewed. The primary endpoint was the diagnostic success. Secondary endpoints were technical success, total procedure duration, number of CT acquisitions and the dose length product (DLP) during step ∆1 (from planning to initial needle placement), step ∆2 (progression to target), and the entire intervention (from planning to final control) and complications. Additional parameters were recorded, such as the lesion’s size and trajectory angles. Sixty patients were included in each group. The lesions median size and median values of the two trajectory angles were significantly lower (20 vs. 29.5 mm, p = 0.006) and higher in the NAV-group (15.5° and 10° vs. 6° and 1°; p < 0.01), respectively. Technical and diagnostic success rates were similar in both groups, respectively 95% and 93.3% in the NAV-group, and 93.3% and 91.6% in the CT-group. There was no significant difference in total procedure duration (p = 0.487) and total number of CT acquisitions (p = 0.066), but the DLP was significantly lower in the NAV-group (p < 0.01). There was no significant difference in complication rate. For PLB, CT-Navigation™ system is efficient and safe as compared to the conventional CT method.
Highlights
The purpose of this study was to assess the efficiency of the computed tomography (CT)-NavigationTM system compared to conventional CT methods for percutaneous lung biopsy (PLB) in terms of diagnostic success, complication rate, procedure time and radiation exposure
There was no significant difference between the NAV and CT
With a population of 120 patients, the present study based on our initial experience with the CT-NavigationTM electromagnetic system demonstrates that the use of this system for PLB is efficient and safe compared to conventional CT methods
Summary
Laser navigation systems allow CT-guided interventions to be carried out more quickly with a lower radiation dose This type of system does not have the advantage of offering real-time guidance of the needle [7,8]. In order to improve accuracy and limit X-ray exposure, a series of navigational guidance tools have been developed, based on the principle of “augmented reality” [1,9] These new systems allow electromagnetic [2,10,11,12,13,14,15,16,17,18], or optical tracking of devices [19,20,21,22,23], that are used for interventional radiology or surgical procedures. In a previous study, which included 120 CT-guided interventions with different procedures in the thoracoabdominal region, the CT-NavigationTM electromagnetic system (Imactis SAS, La Tronche, France) has demonstrated a more accurate placement of the needle with fewer control acquisitions compared with conventional methods [13]
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