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

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

1 Citation (Scopus)

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 languageEnglish (US)
Title of host publicationMedical Imaging 2010
Subtitle of host publicationPhysics of Medical Imaging
Volume7622
EditionPART 3
DOIs
StatePublished - Dec 1 2010
EventMedical Imaging 2010: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 15 2010Feb 18 2010

Other

OtherMedical Imaging 2010: Physics of Medical Imaging
CountryUnited States
CitySan Diego, CA
Period2/15/102/18/10

Fingerprint

Quantum noise
Calcinosis
Mammography
Visibility
Noise
Selenium
Liquid crystal displays
Pixels
visibility
breast
automatic frequency control
digital systems
anatomy
quadrants
workstations
selenium
pixels
filters
evaluation
Anatomy

Keywords

  • 4-AFC
  • Anatomic noise
  • Digital mammography
  • Microcalcification
  • Quantum noise

ASJC Scopus subject areas

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

Cite this

Lai, C. J., Liu, X., You, Z., Shen, Y., Zhong, Y., Chen, L., ... 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., Vol. 7622). [76224Y] 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; Shen, Youtao; Zhong, Yuncheng; Chen, Lingyun; Han, Tao; Ge, Shuaiping; Yi, Ying; Geiser, William R.; Flores, David; Whitman, Gary J.; Yang, Wei T.; Shaw, Chris C.

Medical Imaging 2010: Physics of Medical Imaging. Vol. 7622 PART 3. ed. 2010. 76224Y.

Research output: Chapter in Book/Report/Conference proceedingConference 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, vol. 7622, 76224Y, Medical Imaging 2010: Physics of Medical Imaging, San Diego, CA, United States, 2/15/10. https://doi.org/10.1117/12.844426
Lai CJ, Liu X, You Z, Shen Y, Zhong Y, Chen L et al. 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. Vol. 7622. 2010. 76224Y https://doi.org/10.1117/12.844426
Lai, Chao Jen ; Liu, Xinming ; You, Zhicheng ; Shen, Youtao ; Zhong, Yuncheng ; Chen, Lingyun ; Han, Tao ; Ge, Shuaiping ; Yi, Ying ; Geiser, William R. ; Flores, David ; Whitman, Gary J. ; Yang, Wei T. ; Shaw, Chris C. / Detection of simulated microcalcifications in digital mammography-effects of quantum and anatomic noises : Preliminary study. Medical Imaging 2010: Physics of Medical Imaging. Vol. 7622 PART 3. ed. 2010.
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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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