Freehand biopsy guided by electromagnetic needle tracking: a phantom study.
Ultraschall Med
; 32(6): 614-8, 2011 Dec.
Article
in En
| MEDLINE
| ID: mdl-22144128
ABSTRACT
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 ANDMETHODS:
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 1 âcm 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 88â% for in-plane needle-guided biopsy, 87â% for in-plane needle tracking, and 92â% 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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Biopsy, Needle
/
Image Processing, Computer-Assisted
/
Ultrasonography, Interventional
/
Phantoms, Imaging
/
Surgery, Computer-Assisted
/
Electromagnetic Phenomena
Type of study:
Diagnostic_studies
Limits:
Humans
Language:
En
Journal:
Ultraschall Med
Year:
2011
Document type:
Article
Affiliation country:
Dinamarca