Variational guidewire tracking using phase congruency.
We present a novel method to track a guidewire in cardiac x-ray video. Using variational calculus, we derive differential equations that deform a spline, subject to intrinsic and extrinsic forces, so that it matches the image data, remains smooth, and preserves an a priori length. We analytically derive these equations from first principles, and show how they include tangential terms, which we include in our model. To address the poor contrast often observed in x-ray video, we propose using phase congruency as an image-based feature. Experimental results demonstrate the success of the method in tracking guidewires in low contrast x-ray video.
Slabaugh
Greg
G
Intelligent Vision and Reasoning Department, Siemens Corporate Research, USA. greg.slabaugh@siemens.com
Kong
Koon
K
Unal
Gozde
G
Fang
Tong
T
D000465:Algorithms; D001185:Artificial Intelligence; D006328:Cardiac Catheterization / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D010363:Pattern Recognition, Automated / Q000379:methods*; D011856:Radiographic Image Enhancement / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014741:Video Recording / Q000379:methods*