A discriminative-generative model for detecting intravenous contrast in CT images. Academic Article uri icon

Overview

abstract

  • This paper presents an algorithm for the automatic detection of intravenous contrast in CT scans. This is useful e.g. for quality control, given the unreliability of the existing DICOM contrast metadata. The algorithm is based on a hybrid discriminative-generative probabilistic model. A discriminative detector localizes enhancing regions of interest in the scan. Then a generative classifier optimally fuses evidence gathered from those regions into an efficient, probabilistic prediction. The main contribution is in the generative part. It assigns optimal weights to the detected organs based on their learned degree of enhancement under contrast material. The model is robust with respect to missing organs, patients geometry, pathology and settings. Validation is performed on a database of 400 highly variable patients CT scans. Results indicate detection accuracy greater than 91% at approximately 1 second per scan.

publication date

  • January 1, 2011

Research

keywords

  • Contrast Media
  • Image Processing, Computer-Assisted
  • Infusions, Intravenous
  • Tomography, X-Ray Computed

Identity

Scopus Document Identifier

  • 82255181741

Digital Object Identifier (DOI)

  • 10.1007/978-3-642-23626-6_7

PubMed ID

  • 22003683

Additional Document Info

volume

  • 14

issue

  • Pt 3