Projection-based bolus detection for computed tomographic angiography

J Comput Assist Tomogr. 2006 Sep-Oct;30(5):846-9. doi: 10.1097/01.rct.0000230000.08027.ad.

Abstract

Computed tomographic (CT) angiography is important for imaging studies on cardiovascular structures, peripheral vessels, and solid organs. In practice, a CT angiography scan is triggered by the bolus arrival at a prespecified anatomical location, which is determined using CT fluoroscopy. In this article, we propose a projection-based method adapted from the Grangeat formula to detect the bolus arrival. Then, we evaluate our new method in numerical and animal studies. Our results indicate that this method allows significantly better temporal resolution and is computationally more efficient, as compared with the image-based methods.

Publication types

  • Evaluation Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Algorithms
  • Angiography / methods
  • Animals
  • Contrast Media*
  • Fluoroscopy / methods
  • Lung / diagnostic imaging
  • Models, Theoretical
  • Radiographic Image Enhancement / methods
  • Radiographic Image Interpretation, Computer-Assisted / methods*
  • Sheep
  • Time Factors
  • Tomography, X-Ray Computed / methods*

Substances

  • Contrast Media