Comparison of detectability in step-and-shoot mode and continuous mode digital tomosynthesis systems

Changwoo Lee, Minah Han, Jongduk Baek

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

3 Citations (Scopus)

Abstract

Digital tomosynthesis system has been widely used in chest, dental, and breast imaging. Since the digital tomosynthesis system provides volumetric images from multiple projection data, structural noise inherent in X-ray radiograph can be reduced, and thus signal detection performance is improved. Currently, tomosynthesis system uses two data acquisition modes: step-and-shoot mode and continuous mode. Several studies have been conducted to compare the system performance of two acquisition modes with respect to spatial resolution and contrast. In this work, we focus on signal detectability in step-and-shoot mode and continuous mode. For evaluation, uniform background is considered, and eight spherical objects with diameters of 0.5, 0.8, 1, 2, 3, 5, 8, 10 mm are used as signals. Projection data with and without spherical objects are acquired in step-and-shoot mode and continuous mode, respectively, and quantum noise are added. Then, noisy projection data are reconstructed by FDK algorithm. To compare the detection performance of two acquisition modes, we calculate task signal-to-noise ratio (SNR) of channelized Hotelling observer with Laguerre-Gauss channels for each spherical object. While the task-SNR values of two acquisition modes are similar for spherical objects larger than 1 mm diameter, step-and-shoot mode yields higher detectability for small signal sizes. The main reason of this behavior is that small signal is more affected by X-ray tube motion blur than large signal. Our results indicate that it is beneficial to use step-and-shoot data acquisition mode to improve the detectability of small signals (i.e., less than 1 mm diameter) in digital tomosynthesis systems.

Original languageEnglish
Title of host publicationMedical Imaging 2017
Subtitle of host publicationPhysics of Medical Imaging
PublisherSPIE
Volume10132
ISBN (Electronic)9781510607095
DOIs
Publication statusPublished - 2017 Jan 1
EventMedical Imaging 2017: Physics of Medical Imaging - Orlando, United States
Duration: 2017 Feb 132017 Feb 16

Other

OtherMedical Imaging 2017: Physics of Medical Imaging
CountryUnited States
CityOrlando
Period17/2/1317/2/16

Fingerprint

digital systems
Signal-To-Noise Ratio
Noise
Data acquisition
Signal to noise ratio
X-Rays
Quantum noise
X ray tubes
Signal detection
Tooth
Breast
Thorax
Imaging techniques
X rays
acquisition
projection
data acquisition
signal to noise ratios
chest
signal detection

All Science Journal Classification (ASJC) codes

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

Cite this

Lee, C., Han, M., & Baek, J. (2017). Comparison of detectability in step-and-shoot mode and continuous mode digital tomosynthesis systems. In Medical Imaging 2017: Physics of Medical Imaging (Vol. 10132). [1013252] SPIE. https://doi.org/10.1117/12.2249954
Lee, Changwoo ; Han, Minah ; Baek, Jongduk. / Comparison of detectability in step-and-shoot mode and continuous mode digital tomosynthesis systems. Medical Imaging 2017: Physics of Medical Imaging. Vol. 10132 SPIE, 2017.
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abstract = "Digital tomosynthesis system has been widely used in chest, dental, and breast imaging. Since the digital tomosynthesis system provides volumetric images from multiple projection data, structural noise inherent in X-ray radiograph can be reduced, and thus signal detection performance is improved. Currently, tomosynthesis system uses two data acquisition modes: step-and-shoot mode and continuous mode. Several studies have been conducted to compare the system performance of two acquisition modes with respect to spatial resolution and contrast. In this work, we focus on signal detectability in step-and-shoot mode and continuous mode. For evaluation, uniform background is considered, and eight spherical objects with diameters of 0.5, 0.8, 1, 2, 3, 5, 8, 10 mm are used as signals. Projection data with and without spherical objects are acquired in step-and-shoot mode and continuous mode, respectively, and quantum noise are added. Then, noisy projection data are reconstructed by FDK algorithm. To compare the detection performance of two acquisition modes, we calculate task signal-to-noise ratio (SNR) of channelized Hotelling observer with Laguerre-Gauss channels for each spherical object. While the task-SNR values of two acquisition modes are similar for spherical objects larger than 1 mm diameter, step-and-shoot mode yields higher detectability for small signal sizes. The main reason of this behavior is that small signal is more affected by X-ray tube motion blur than large signal. Our results indicate that it is beneficial to use step-and-shoot data acquisition mode to improve the detectability of small signals (i.e., less than 1 mm diameter) in digital tomosynthesis systems.",
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Lee, C, Han, M & Baek, J 2017, Comparison of detectability in step-and-shoot mode and continuous mode digital tomosynthesis systems. in Medical Imaging 2017: Physics of Medical Imaging. vol. 10132, 1013252, SPIE, Medical Imaging 2017: Physics of Medical Imaging, Orlando, United States, 17/2/13. https://doi.org/10.1117/12.2249954

Comparison of detectability in step-and-shoot mode and continuous mode digital tomosynthesis systems. / Lee, Changwoo; Han, Minah; Baek, Jongduk.

Medical Imaging 2017: Physics of Medical Imaging. Vol. 10132 SPIE, 2017. 1013252.

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

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Lee C, Han M, Baek J. Comparison of detectability in step-and-shoot mode and continuous mode digital tomosynthesis systems. In Medical Imaging 2017: Physics of Medical Imaging. Vol. 10132. SPIE. 2017. 1013252 https://doi.org/10.1117/12.2249954