Investigation on location dependent detectability in cone beam CT images with uniform and anatomical backgrounds

Minah Han; Jongduk Baek

doi:10.1117/12.2254182

Investigation on location dependent detectability in cone beam CT images with uniform and anatomical backgrounds

Minah Han, Jongduk Baek

School of Integrated Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We investigate location dependent lesion detectability of cone beam computed tomography images for different background types (i.e., uniform and anatomical), image planes (i.e., transverse and longitudinal) and slice thicknesses. Anatomical backgrounds are generated using a power law spectrum of breast anatomy, 1/f 3. Spherical object with a 5mm diameter is used as a signal. CT projection data are acquired by the forward projection of uniform and anatomical backgrounds with and without the signal. Then, projection data are reconstructed using the FDK algorithm. Detectability is evaluated by a channelized Hotelling observer with dense difference-of-Gaussian channels. For uniform background, off-centered images yield higher detectability than iso-centered images for the transverse plane, while for the longitudinal plane, detectability of iso-centered and off-centered images are similar. For anatomical background, officentered images yield higher detectability for the transverse plane, while iso-centered images yield higher detectability for the longitudinal plane, when the slice thickness is smaller than 1.9mm. The optimal slice thickness is 3.8mm for all tasks, and the transverse plane at the off-center (iso-center and off-center) produces the highest detectability for uniform (anatomical) background.

Original language	English
Title of host publication	Medical Imaging 2017
Subtitle of host publication	Image Perception, Observer Performance, and Technology Assessment
Editors	Robert M. Nishikawa, Matthew A. Kupinski
Publisher	SPIE
ISBN (Electronic)	9781510607170
DOIs	https://doi.org/10.1117/12.2254182
Publication status	Published - 2017
Event	Medical Imaging 2017: Image Perception, Observer Performance, and Technology Assessment - Orlando, United States Duration: 2017 Feb 12 → 2017 Feb 13

Publication series

Name	Progress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume	10136
ISSN (Print)	1605-7422

Other

Other	Medical Imaging 2017: Image Perception, Observer Performance, and Technology Assessment
Country/Territory	United States
City	Orlando
Period	17/2/12 → 17/2/13

Bibliographical note

Publisher Copyright:
© 2017 SPIE.

All Science Journal Classification (ASJC) codes

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

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10.1117/12.2254182

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Han, M., & Baek, J. (2017). Investigation on location dependent detectability in cone beam CT images with uniform and anatomical backgrounds. In R. M. Nishikawa, & M. A. Kupinski (Eds.), Medical Imaging 2017: Image Perception, Observer Performance, and Technology Assessment Article 101361D (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 10136). SPIE. https://doi.org/10.1117/12.2254182

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title = "Investigation on location dependent detectability in cone beam CT images with uniform and anatomical backgrounds",

abstract = "We investigate location dependent lesion detectability of cone beam computed tomography images for different background types (i.e., uniform and anatomical), image planes (i.e., transverse and longitudinal) and slice thicknesses. Anatomical backgrounds are generated using a power law spectrum of breast anatomy, 1/f 3. Spherical object with a 5mm diameter is used as a signal. CT projection data are acquired by the forward projection of uniform and anatomical backgrounds with and without the signal. Then, projection data are reconstructed using the FDK algorithm. Detectability is evaluated by a channelized Hotelling observer with dense difference-of-Gaussian channels. For uniform background, off-centered images yield higher detectability than iso-centered images for the transverse plane, while for the longitudinal plane, detectability of iso-centered and off-centered images are similar. For anatomical background, officentered images yield higher detectability for the transverse plane, while iso-centered images yield higher detectability for the longitudinal plane, when the slice thickness is smaller than 1.9mm. The optimal slice thickness is 3.8mm for all tasks, and the transverse plane at the off-center (iso-center and off-center) produces the highest detectability for uniform (anatomical) background.",

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Han, M & Baek, J 2017, Investigation on location dependent detectability in cone beam CT images with uniform and anatomical backgrounds. in RM Nishikawa & MA Kupinski (eds), Medical Imaging 2017: Image Perception, Observer Performance, and Technology Assessment., 101361D, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, vol. 10136, SPIE, Medical Imaging 2017: Image Perception, Observer Performance, and Technology Assessment, Orlando, United States, 17/2/12. https://doi.org/10.1117/12.2254182

Investigation on location dependent detectability in cone beam CT images with uniform and anatomical backgrounds. / Han, Minah; Baek, Jongduk.
Medical Imaging 2017: Image Perception, Observer Performance, and Technology Assessment. ed. / Robert M. Nishikawa; Matthew A. Kupinski. SPIE, 2017. 101361D (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 10136).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Investigation on location dependent detectability in cone beam CT images with uniform and anatomical backgrounds

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