Open AccessA novel design of N-fiducial phantom for automatic ultrasound calibration
Author(s) -
Maria Chatrasingh,
Jackrit Suthakorn
Publication year - 2019
Publication title -
journal of medical physics/journal of medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.292
H-Index - 24
eISSN - 1998-3913
pISSN - 0971-6203
DOI - 10.4103/jmp.jmp_92_18
Subject(s) - fiducial marker , imaging phantom , ransac , calibration , computer science , artificial intelligence , computer vision , robustness (evolution) , feature extraction , noise (video) , feature (linguistics) , 3d ultrasound , frame (networking) , mathematics , nuclear medicine , ultrasound , image (mathematics) , medicine , radiology , statistics , telecommunications , biochemistry , chemistry , linguistics , philosophy , gene
Freehand ultrasound (US) is a technique used to acquire three-dimensional (3D) US images using a tracked 2D US probe. Calibrating the probe with a proper calibration phantom improves the precision of the technique and allows several applications in computer-assisted surgery. N-fiducial phantom is widely used due to the robustness of precise fabrication and convenience of use. In principle, the design supports single-frame calibration by providing at least three noncollinear points in 3D space at once. Due to this requirement, most designs contain multiple N-fiducials in unpatterned and noncollinear arrangements. The unpatterned multiple N-fiducials appearing as scattered dots in the US image are difficult to extract, and the extracted data are usually contaminated with noise. In practice, the extraction mostly relied on manual interventions, and calibration with N-fiducial phantom has not yet achieved high accuracy with single or few frame calibrations due to noise contamination.