Calibration technique for monoplane stereo x-ray system in imaging guidance

Hang-yi Jiang; Hong Liu; Wei R. Chen

doi:10.1117/12.384894

3 May 2000 Calibration technique for monoplane stereo x-ray system in imaging guidance

Hang-yi Jiang, Hong Liu, Wei R. Chen

Proceedings Volume 3911, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems II; (2000) https://doi.org/10.1117/12.384894
Event: BiOS 2000 The International Symposium on Biomedical Optics, 2000, San Jose, CA, United States

Abstract

A simple calibration technique for monoplane stereo x-ray imaging system in stereotactic breast biopsy was developed. According to the principle of perspective projection, a monoplane stereo imaging model was established, the geometric parameters for the purpose of 3D point reconstruction were described. The parameters are source- imager-distance and the x-ray tube positions with respect to the imaging receptor. These parameters are calculated using a phantom consisting of three radio-opaque calibration lines of known length and orientation in 3D space and applying the concepts of similar triangles. Two line segments are parallel to the image detector and another one is perpendicular to the image detector. The computer simulations and experiments were carried out which determines these parameters for our CCD based monoplane stereotactic prototype. The results were in agreement with the theoretical prediction. This calibration technique is applied to the stereo imaging system where the final calibration error is within 1.5 percent. The method is simple and reliable. One promising application of this technique for the calibration lies in digital mammography imaging guidance, but applications in other forms of radiographic imaging are possible also.

Citation Download Citation

Hang-yi Jiang, Hong Liu, and Wei R. Chen "Calibration technique for monoplane stereo x-ray system in imaging guidance", Proc. SPIE 3911, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems II, (3 May 2000); https://doi.org/10.1117/12.384894

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