Investigation on slice direction dependent detectability of volumetric cone beam CT images

Minah Han, Changwoo Lee, Subok Park, Jongduk Baek

Research output: Contribution to journalArticle

10 Citations (Scopus)


We investigate the detection performance of transverse and longitudinal planes for various signal sizes (i.e., 1 mm to 8 mm diameter spheres) in cone beam computed tomography (CBCT) images. CBCT images are generated by computer simulation and images are reconstructed using an FDK algorithm. For each slice direction and signal size, a human observer study is conducted with a signal-knownexactly/background-known-exactly (SKE/BKE) binary detection task. The detection performance of human observers is compared with that of a channelized Hotelling observer (CHO). The detection performance of an ideal linear observer is also calculated using a CHO with Laguerre-Gauss (LG) channels. The detectability of high contrast small signals (i.e., up to 4-mm-diameter spheres) is higher in the longitudinal plane than the transverse plane. It is also shown that CHO performance correlates well with human observer performance in both transverse and longitudinal plane images.

Original languageEnglish
Pages (from-to)3749-3764
Number of pages16
JournalOptics Express
Issue number4
Publication statusPublished - 2016 Feb 22

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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