Detection of simulated microcalcifications in digital mammography-effects of quantum and anatomic noises: Preliminary study

Chao Jen Lai; Xinming Liu; Zhicheng You; Youtao Shen; Yuncheng Zhong; Lingyun Chen; Tao Han; Shuaiping Ge; Ying Yi; William R. Geiser; David Flores; Gary J. Whitman; Wei T. Yang; Chris C. Shaw

doi:10.1117/12.844426

Detection of simulated microcalcifications in digital mammography-effects of quantum and anatomic noises: Preliminary study

Chao Jen Lai, Xinming Liu, Zhicheng You, Youtao Shen, Yuncheng Zhong, Lingyun Chen, Tao Han, Shuaiping Ge, Ying Yi, William R. Geiser, David Flores, Gary J. Whitman, Wei T. Yang, Chris C. Shaw

Imaging Physics

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

1 Scopus citations

Abstract

To study the effects of overlapping anatomy on microcalcification detection at various incident exposure levels. Images of an anthropomorphic breast phantom (RMI 169) overlapping with simulated microcalcifications ranging from 150 to 212 μn in size placed in two breast density regions, fatty and heterogencously dense, were acquired with an a-Si/a-Se flat panel based digital mammography system (Selenia) operated with Mo-Mo target/filter combination at 28 kVp. The mammograms were exposed with 20, 30, 40, 60, 80, 120, 160, 240 and 325 mAs for varying the exposure level. A 4-AFC study was performed for evaluation of the detection performance. Four 400×400-pixel images were displayed as 2×2 array on a LCD flat panel based review workstation. One of the four images contained a cluster of five microcalcifications and was randomly placed in one of the four quadrants. A physicist was asked to select the image containing the microcalcifications and to report the number of visible microcalcifications. The fraction of correct responses was computed with two different criteria: (1) the selected images contained one or more microcalcifications, and (2) the selected images contained 4 or 5 visible microcalcifications. The statistical significance of the differences in fractions for different exposure levels and regions was evaluated. The results showed that, if visibility of one or more microcalcifications is required, the fractions of correct responses were 1 for all size groups and most exposure levels in both fatty and heterogencously dense regions. If a visibility of 80% or more of the microcalcifications was required, the fractions of correct responses significantly decreased in both regions. The results indicated that microcalcification detection in the fatty region appeared to be mainly limited by the quantum noise, and that in the heterogencously dense region may be limited by both the anatomic noise and the quantum noise.

Original language	English (US)
Title of host publication	Medical Imaging 2010
Subtitle of host publication	Physics of Medical Imaging
Edition	PART 3
DOIs	https://doi.org/10.1117/12.844426
State	Published - 2010
Event	Medical Imaging 2010: Physics of Medical Imaging - San Diego, CA, United States Duration: Feb 15 2010 → Feb 18 2010

Publication series

Name	Progress in Biomedical Optics and Imaging - Proceedings of SPIE
Number	PART 3
Volume	7622
ISSN (Print)	1605-7422

Other

Other	Medical Imaging 2010: Physics of Medical Imaging
Country/Territory	United States
City	San Diego, CA
Period	2/15/10 → 2/18/10

Keywords

4-AFC
Anatomic noise
Digital mammography
Microcalcification
Quantum noise

ASJC Scopus subject areas

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

Access to Document

10.1117/12.844426

Cite this

Lai, C. J., Liu, X., You, Z., Shen, Y., Zhong, Y., Chen, L., Han, T., Ge, S., Yi, Y., Geiser, W. R., Flores, D., Whitman, G. J., Yang, W. T., & Shaw, C. C. (2010). Detection of simulated microcalcifications in digital mammography-effects of quantum and anatomic noises: Preliminary study. In Medical Imaging 2010: Physics of Medical Imaging (PART 3 ed.). Article 76224Y (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 7622, No. PART 3). https://doi.org/10.1117/12.844426

Detection of simulated microcalcifications in digital mammography-effects of quantum and anatomic noises: Preliminary study. / Lai, Chao Jen; Liu, Xinming; You, Zhicheng et al.
Medical Imaging 2010: Physics of Medical Imaging. PART 3. ed. 2010. 76224Y (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 7622, No. PART 3).

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

Lai, CJ, Liu, X, You, Z, Shen, Y, Zhong, Y, Chen, L, Han, T, Ge, S, Yi, Y, Geiser, WR, Flores, D, Whitman, GJ , Yang, WT & Shaw, CC 2010, Detection of simulated microcalcifications in digital mammography-effects of quantum and anatomic noises: Preliminary study. in Medical Imaging 2010: Physics of Medical Imaging. PART 3 edn, 76224Y, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, no. PART 3, vol. 7622, Medical Imaging 2010: Physics of Medical Imaging, San Diego, CA, United States, 2/15/10. https://doi.org/10.1117/12.844426

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abstract = "To study the effects of overlapping anatomy on microcalcification detection at various incident exposure levels. Images of an anthropomorphic breast phantom (RMI 169) overlapping with simulated microcalcifications ranging from 150 to 212 μn in size placed in two breast density regions, fatty and heterogencously dense, were acquired with an a-Si/a-Se flat panel based digital mammography system (Selenia) operated with Mo-Mo target/filter combination at 28 kVp. The mammograms were exposed with 20, 30, 40, 60, 80, 120, 160, 240 and 325 mAs for varying the exposure level. A 4-AFC study was performed for evaluation of the detection performance. Four 400×400-pixel images were displayed as 2×2 array on a LCD flat panel based review workstation. One of the four images contained a cluster of five microcalcifications and was randomly placed in one of the four quadrants. A physicist was asked to select the image containing the microcalcifications and to report the number of visible microcalcifications. The fraction of correct responses was computed with two different criteria: (1) the selected images contained one or more microcalcifications, and (2) the selected images contained 4 or 5 visible microcalcifications. The statistical significance of the differences in fractions for different exposure levels and regions was evaluated. The results showed that, if visibility of one or more microcalcifications is required, the fractions of correct responses were 1 for all size groups and most exposure levels in both fatty and heterogencously dense regions. If a visibility of 80% or more of the microcalcifications was required, the fractions of correct responses significantly decreased in both regions. The results indicated that microcalcification detection in the fatty region appeared to be mainly limited by the quantum noise, and that in the heterogencously dense region may be limited by both the anatomic noise and the quantum noise.",

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AU - Ge, Shuaiping

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AB - To study the effects of overlapping anatomy on microcalcification detection at various incident exposure levels. Images of an anthropomorphic breast phantom (RMI 169) overlapping with simulated microcalcifications ranging from 150 to 212 μn in size placed in two breast density regions, fatty and heterogencously dense, were acquired with an a-Si/a-Se flat panel based digital mammography system (Selenia) operated with Mo-Mo target/filter combination at 28 kVp. The mammograms were exposed with 20, 30, 40, 60, 80, 120, 160, 240 and 325 mAs for varying the exposure level. A 4-AFC study was performed for evaluation of the detection performance. Four 400×400-pixel images were displayed as 2×2 array on a LCD flat panel based review workstation. One of the four images contained a cluster of five microcalcifications and was randomly placed in one of the four quadrants. A physicist was asked to select the image containing the microcalcifications and to report the number of visible microcalcifications. The fraction of correct responses was computed with two different criteria: (1) the selected images contained one or more microcalcifications, and (2) the selected images contained 4 or 5 visible microcalcifications. The statistical significance of the differences in fractions for different exposure levels and regions was evaluated. The results showed that, if visibility of one or more microcalcifications is required, the fractions of correct responses were 1 for all size groups and most exposure levels in both fatty and heterogencously dense regions. If a visibility of 80% or more of the microcalcifications was required, the fractions of correct responses significantly decreased in both regions. The results indicated that microcalcification detection in the fatty region appeared to be mainly limited by the quantum noise, and that in the heterogencously dense region may be limited by both the anatomic noise and the quantum noise.

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Detection of simulated microcalcifications in digital mammography-effects of quantum and anatomic noises: Preliminary study

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