Evaluation of edge effect due to phase contrast imaging for mammography

Matsuo, Shoichiro; Katafuchi, Tetsuro; Tohyama, Keiko; Morishita, Junji; Yamada, Katsuhiko; Fujita, Hiroshi

doi:10.1118/1.1992087

Cited by 33 publications

(24 citation statements)

References 16 publications

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“…Phase imaging with a digital X-ray detector in our study could not produce edge-enhanced images as was seen in phase imaging with use of an analogue X-ray detector [4,5]. The cause was that the edge-enhancement effect was reduced, because the resolution characteristic of a photostimulable phosphor plate of computed radiography was much inferior to that with an intensifying screen-film system.…”

Section: Discussionmentioning

confidence: 75%

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Image-quality assessment method for digital phase-contrast imaging based on two-dimensional power spectral analysis

Matsuo

Morishita

Katafuchi

et al. 2011

Radiol Phys Technol

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With use of the phase shift of X-rays that occurs when they pass through an object, phase-contrast imaging (herein referred to as "phase imaging") can produce images different from those of conventional contact imaging (herein referred to as "conventional imaging"). For this reason, assessment of the image quality based on noise-equivalent quanta (NEQ) and detective quantum efficiency (DQE) which does not include object-based information may not be appropriate for comparison of image quality between phase and conventional images. As an alternative method, we conceived a new image-quality assessment method with images that contain information about an object. First, we constructed images with an object and without an object under the same imaging parameters; then, we obtained two-dimensional power spectra by Fourier transform of those images. Second, we calculated the radial direction distribution function with the power spectra, and the distribution of signal intensity, which we defined as a signal intensity distribution function (SIDF). In this way, differences in image quality were evaluated relatively based on the SIDF of the imaged object. In our study, we first confirmed that phase-imaging evaluation was not appropriate by comparing NEQ and DQE of conventional, magnification, and phase imaging. Further, comparing the image quality of projected plant seeds by employing conventional, magnification, and phase imaging, we found that the phase-imaging method provided a higher image quality regarding edge sharpness than did conventional and magnification imaging. Therefore, based on these results, our image assessment method is considered useful for evaluation of images which include object-based information.

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Section: Discussionmentioning

confidence: 75%

“…Phase imaging is intended to provide edge enhancement (phase effect) of an imaged object, utilizing refracted X-rays which occur when X-rays pass through the object [3][4][5][6][7][8][9][10].…”

mentioning

confidence: 99%

Image-quality assessment method for digital phase-contrast imaging based on two-dimensional power spectral analysis

Matsuo

Morishita

Katafuchi

et al. 2011

Radiol Phys Technol

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“…The theoretical consideration suggests that the phase-contrast effect would be more conspicuous in the images of fibroglandular tissue than calcification grains in the breast images. Matsuo et al (2005), in their empirical study of the total image quality evaluation including phase contrast, reported that phase contrast increases image signal as spatial frequency increases.…”

Section: Improvement Of Image Sharpness In Digital Full-field Pcmmentioning

confidence: 98%

Full-field Digital Phase-contrast Mammography

Tanaka¹,

Honda²,

Matsuo³

et al. 2008

Cancer Imaging

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“…A longer distance than typical clinical mammography values was utilized to target future applications, as this configuration has been used for preliminary studies in inline phase contrast x-ray imaging indicating the potential to reduce the dose in mammography without negatively affecting the detection capability [7,[35][36][37][38][39]. In addition, the air gap in this configuration provides a comparable amount of scatter rejection and resultant image quality improvement as the grid used in clinical systems [6,40,41]. The object was simulated by a BR12 phantom (Model 014A, CIRS, Norfolk, Virginia, USA) with a thickness of 5 cm.…”

Section: Inline X-ray Imaging System and Measurement Componentsmentioning

confidence: 99%

X-Ray Phase Imaging for Breast Cancer Detection

Wu¹

2012

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2. REPORT TYPE AUTHOR(S)Xizeng Wu, Ph.D.5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBERUniversity of Alabama at Birmingham, Birmingham, AL 35294 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) U.S. Army Medical Research and MaterialFort Detrick, Maryland 21702-5012 SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release; distribution unlimited SUPPLEMENTARY NOTES ABSTRACTAiming to develop a low-dose and quantitative x-ray phase imaging technique for facilitating breast cancer detection, in this project we designed and built a high-voltage x-ray imaging prototype that enables x-ray phase imaging and radiation dose reduction, as is demonstrated in phantom imaging. We developed an innovative phase attenuation duality based (PAD-based) method, which greatly facilitating the low doe phase retrieval for soft tissue body parts such as breast. The phantom imaging demonstrated that the PAD-based phase retrieval greatly enhance the contrast-to noise ratios of images, hence it has good potential for reducing radiation doses in breast imaging. We also developed a robust general phase retrieval method, the attenuation-partition based (AP-based) method for general clinical imaging. This method was demonstrated to be superior to the mostly used phase retrieval method in literature in performing robust phase retrieval for low-dose imaging. Considering the high breast density is one of the biggest risk factors for breast cancer, we proposed for the first time an x-ray phase-shifts based method of breast density measurement, as a quantitative imaging method of the phase-sensitive breast imaging. SUBJECT TERMSPhase-contrast x-ray imaging, Breast imaging, Phase retrieval Page 3 References……………………………………………………………………………. 14 Appendices…………………………………………………………………………… 16Page 4 Figure 1. Relative phase contrast visibility varies for different R1 and R2 of a system with a SID =1.5 m. In this plot we assumed a uniform circular focal spot of 50...

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Evaluation of edge effect due to phase contrast imaging for mammography

Cited by 33 publications

References 16 publications

Image-quality assessment method for digital phase-contrast imaging based on two-dimensional power spectral analysis

Image-quality assessment method for digital phase-contrast imaging based on two-dimensional power spectral analysis

Full-field Digital Phase-contrast Mammography

X-Ray Phase Imaging for Breast Cancer Detection

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