Closed-form freehand 3D ultrasound spatial calibration based on N-wedge phantom

EasyChair Preprint 426

Abstract

Freehand 3D ultrasound imaging system has many applications in healthcare. The purpose of ultrasound calibration is to determine the transformation matrix from the ultrasound probe coordinate system to the ultrasound image coordinate system. In this study, we propose a variant of the widely used N-wire phantom called the N-wedge phantom, which is a combination phantom of wires and wedges. Prototypes of the two phantoms were produced, and we compared the N-wedge phantom and N-wire phantom in terms of their precision, accuracy, calibration time, ease of use, and ease of manufacture. The mean values of the precision of the N-wedge phantom and N-wire phantom at the center point are 0.67 mm and 0.74 mm, respectively, while the mean values of the accuracy of the phantoms are 1.73 mm and 1.89 mm, respectively. Calibration using the two phantoms can meet the requirements for medical application; however, the N-wedge phantom is easier to use and can be manufactured without sacrificing precision and accuracy.

Keyphrases: N-wedge phantom, closed form, freehand 3D ultrasound, ultrasound calibration

@booklet{EasyChair:426,
  author    = {Yanping Lin and Zhenhuan Wang and Xiaojie Guo and Huixiang Wang and Fang Wang},
  title     = {Closed-form freehand 3D ultrasound spatial calibration based on N-wedge phantom},
  doi       = {10.29007/zrzd},
  howpublished = {EasyChair Preprint 426},
  year      = {EasyChair, 2018}}