Combination of detection and estimation tasks using channelized scanning linear observer for CT imaging systems

Hsin Wu Tseng, Jiahua Fan, Matthew A. Kupinski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Maintaining or even improving image quality while lowering patient dose is always the desire in clinical CT imaging. Iterative reconstruction (IR) algorithms have been designed to help reduce dose and/or provide better image quality. In this work, the channelized scanning linear observer (CSLO) is applied to study the combination of detection and estimation task performance using CT image data. The purpose of this work is to design a task-based approach to quantitatively evaluate image-quality for different reconstruction algorithms. Low-contrast objects embedded in head-size and body-size phantoms are imaged multiple times and reconstructed by FBP and an IR algorithm for this study. Independent signal present and absent ROIs cropped from images are channelized by Difference of Gauss channels for CSLO training and testing. Estimation receiver operating characteristic (EROC) curves and the area under EROC curve (EAUC) are calculated by CSLO as the figure of merit. The One-Shot method is used to compute the variance of the EAUC values. Results suggest that the IR algorithm studied in this work could efficiently reduce the dose approximately 54% to achieve an image quality comparable to conventional FBP reconstruction for the combined detection and estimation tasks.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2015
Subtitle of host publicationImage Perception, Observer Performance, and Technology Assessment
EditorsClaudia R. Mello-Thoms, Matthew A. Kupinski, Claudia R. Mello-Thoms
PublisherSPIE
ISBN (Electronic)9781628415063
DOIs
StatePublished - Jan 1 2015
EventMedical Imaging 2015: Image Perception, Observer Performance, and Technology Assessment - Orlando, United States
Duration: Feb 25 2015Feb 26 2015

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume9416
ISSN (Print)1605-7422

Other

OtherMedical Imaging 2015: Image Perception, Observer Performance, and Technology Assessment
CountryUnited States
CityOrlando
Period2/25/152/26/15

Keywords

  • CT
  • EAUC
  • EROC
  • IR
  • channelized scanning linear observer (CSLO)
  • detection
  • estimation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

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