TY - JOUR
T1 - Freehand biopsy guided by electromagnetic needle tracking
T2 - a phantom study
AU - Ewertsen, C
AU - Nielsen, Marie Kristina Rue
AU - Nielsen, M Bachmann
N1 - © Georg Thieme Verlag KG Stuttgart · New York.
PY - 2011
Y1 - 2011
N2 - Purpose: To evaluate the overall accuracy and time spent on biopsy guided by electromagnetic needle tracking in a phantom compared with the standard technique of US-guided biopsy with an attached steering device. Furthermore, to evaluate off-plane biopsy guided by needle tracking. Materials and Methods: Three different series of biopsy were performed in a phantom: one with a steering device attached to the transducer without needle tracking, simulating the standard ultrasound-guided biopsy procedure (series 1), one freehand in the scan plane using electromagnetic needle tracking (series 2), and one freehand off-the-scan plane using electromagnetic needle tracking (series 3). The phantom contained spheres of 1cm in diameter filled with red dye. Each time of the phantom surface was perforated counted as an attempt. Results: 180 biopsies were performed. The mean time spent on each biopsy in series one was 19.9 seconds (SD: 9.1), in series two 34.1 seconds (SD: 17.9) and in series three 34.4 seconds (SD: 14.0). The overall rate of success was: 88% for in-plane needle-guided biopsy, 87% for in-plane needle tracking, and 92% for off-plane needle tracking. No statistically significant difference between the methods was shown. Conclusion: Needle navigation is a potentially valuable tool for image-guided biopsy with an equal rate of success compared with conventional image-guided biopsy. Furthermore, it enables off-plane image-guided biopsy.
AB - Purpose: To evaluate the overall accuracy and time spent on biopsy guided by electromagnetic needle tracking in a phantom compared with the standard technique of US-guided biopsy with an attached steering device. Furthermore, to evaluate off-plane biopsy guided by needle tracking. Materials and Methods: Three different series of biopsy were performed in a phantom: one with a steering device attached to the transducer without needle tracking, simulating the standard ultrasound-guided biopsy procedure (series 1), one freehand in the scan plane using electromagnetic needle tracking (series 2), and one freehand off-the-scan plane using electromagnetic needle tracking (series 3). The phantom contained spheres of 1cm in diameter filled with red dye. Each time of the phantom surface was perforated counted as an attempt. Results: 180 biopsies were performed. The mean time spent on each biopsy in series one was 19.9 seconds (SD: 9.1), in series two 34.1 seconds (SD: 17.9) and in series three 34.4 seconds (SD: 14.0). The overall rate of success was: 88% for in-plane needle-guided biopsy, 87% for in-plane needle tracking, and 92% for off-plane needle tracking. No statistically significant difference between the methods was shown. Conclusion: Needle navigation is a potentially valuable tool for image-guided biopsy with an equal rate of success compared with conventional image-guided biopsy. Furthermore, it enables off-plane image-guided biopsy.
U2 - 10.1055/s-0031-1281852
DO - 10.1055/s-0031-1281852
M3 - Journal article
SN - 0172-4614
VL - 32
SP - 614
EP - 618
JO - Ultraschall in der Medizin
JF - Ultraschall in der Medizin
IS - 6
ER -