Projection-based bolus detection for computed tomographic angiography

Donghui Lu, Erwei Bai, Jie Liu, Hengyong Yu, Yuchuan Wei, Zhijun Cai, Melhem J. Sharafuddin, Jafar Golzarian, Alan Stolpen, Osama Saba, Michael Vannier, Ge Wang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)846-849
Number of pages4
JournalJournal of computer assisted tomography
Issue number5
StatePublished - Sep 2006


  • Bolus arrival
  • CT angiography
  • CT fluoroscopy
  • Grangeat formula

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