The impact of calibration phantom errors on dual-energy digital mammography.
The impact of calibration phantom errors on dual-energy digital mammography.
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DOI：
10.1088/0031-9155/53/22/004
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发表时间：
2008-11-21
影响因子：
3.5
通讯作者：
Zhang L
中科院分区：
文献类型：
--
作者：
Mou X;Chen X;Sun L;Yu H;Ji Z;Zhang L
微钙化是乳腺癌最早也是最主要的指标之一。由于双能量数字乳腺摄影可以抑制乳腺脂肪和腺体组织之间的对比度，因此它被认为是一种很有前途的技术，可以提高对微钙化的检测。在双能量数字乳房X光照相中，成像对象是人的乳房，而在校准测量中，只有乳房组织等效材料的模体可用。因此，体模和乳腺组织之间的差异将导致校准体模的误差。基于双能量成像模型，推导了标定体模误差的计算公式。然后，利用公开的数据对这类误差进行了定量分析，并与其他类型的误差进行了比较。结果表明，在双能量乳腺摄影中，标定模体误差较大且占主导地位，严重降低了计算精度。对校准模体误差的物理意义的进一步研究表明，具有相同腺体比的成像对象具有相同的校准模体误差。最后，基于我们的研究结果，提出了一种纠错方法。
Microcalcification is one of the earliest and main indicators of breast cancer. Because dual-energy digital mammography could suppress the contrast between the adipose and glandular tissues of the breast, it is considered a promising technique that will improve the detection of microcalcification. In dual-energy digital mammography, the imaged object is a human breast, while in calibration measurements only the phantoms of breast tissue equivalent materials are available. Consequently, the differences between phantoms and breast tissues will lead to calibration phantom errors. Based on the dual-energy imaging model, formulae of calibration phantom errors are derived in this paper. Then, this type of error is quantitatively analyzed using publicly available data and compared with other types of error. The results demonstrate that the calibration phantom error is large and dominant in dual-energy mammography, seriously decreasing calculation precision. Further investigations on the physical meaning of calibration phantom error reveal that the imaged objects with the same glandular ratio have identical calibration phantom error. Finally, an error correction method is proposed based on our findings.
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影响因子：
3.8
作者：
BOONE, JM;SHABER, GS;TECOTZKY, M
通讯作者：
TECOTZKY, M
影响因子：
19.7
作者：
FANDOSMORERA, A;PRATSESTEVE, M;TRAVERIACROS, A
通讯作者：
TRAVERIACROS, A
影响因子：
5
作者：
Soo, MS;Rosen, EL;Baker, JA
通讯作者：
Baker, JA
影响因子：
3.8
作者：
BRODY, WR;BUTT, G;MACOVSKI, A
通讯作者：
MACOVSKI, A
影响因子：
2.6
作者：
WHITE, DR;MARTIN, RJ
通讯作者：
MARTIN, RJ