ROC analysis comparing screen film mammography and digital mammography

被引:0
作者
Gaspard-Bakhach, S [1 ]
Dilhuydy, MH [1 ]
Bonichon, F [1 ]
Barreau, B [1 ]
Henriques, C [1 ]
Maugey-Laulom, B [1 ]
机构
[1] Ctr Reg Lutte Contre Canc, Inst Bergonie, Serv Imagerie Med & Senol, F-33076 Bordeaux, France
来源
JOURNAL DE RADIOLOGIE | 2000年 / 81卷 / 02期
关键词
storage phosphor plate; digital mammography; ROC curves;
D O I
暂无
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose: To compare the diagnosis performances of radiologists on screen film versus digital mammography. Material and methods: Two sets of 123 mammograms, screen film mammography and storage phosphor digital mammography, are studied comparatively with ROC analysis. Results: Phantom study show that conventional method give better scores for usual tension but the detectability of smaller microcalcification is equivalent. To obtain with digital technic the same conventional score you have to increase the radiation dose. Roc Curves, simulated "detection" mode showed that radiologists performed with higher accurancy with concentional system but this difference is weekly statistically significant. ROC Curves, simulated "diagnostic" mode showed the same results wit no statistically significant difference but when the decision to go to the biopsie is the gold standard. ROC Curves were ssentially equivalent for both film screen and digital mammography system. The readers consistently considered the digital mammograms to be less suspicious for cancer findings. The agrement study as proposed by the FDA indicate that probability of a positive digital mammograms given a positive screen film is 75% (threshold value 90%) and the probability of a negative digital mammograms given a negative analog film is 85% (threshold value 85%). Conclusion: Analysis of specific discrepanciers indicate that spatial resolution is an essential limitant factor for digital method but high resolution phosphor plate are interesting in imaging treated breast, radioluscent lesion, fatty benign tumor, hamartoma, intramammary lymph node, breast with prosthesis.
引用
收藏
页码:133 / 139
页数:7
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