公开(公告)号：US5965318A

公开(公告)日：1999-10-12

申请号：US50020

申请日：1998-03-30

申请人： Rudy Goedeweeck ,  Guy Vastenaeken ,  Luc Heremans ,  Kathy Elst

发明人： Rudy Goedeweeck ,  Guy Vastenaeken ,  Luc Heremans ,  Kathy Elst

IPC分类号： G03C5/17 ,  G03C1/00 ,  G03C1/46 ,  G03C5/16 ,  G03C1/035

CPC分类号： G03C1/46 ,  G03C5/16 ,  G03C2200/58 ,  Y10S430/167

摘要： A photographic silver halide material and a method using said material for mammography are disclosed. The photographic material has a large dynamic range and a high contrast, so that lesions deep in the glandular tissue are accurately detected, and also clearly depicts thin tissue such as the skin line of the breast. The sensitometric curve of optical density versus logarithmic exposure logE of said photographic material is characterised by (i) an average gradation of at least 3.5 between Dmin+1.0 and Dmin+2.5; and (ii) a local gradient ranging from 0.7 to 1.8 and an optical density not higher than 3.5 at the point where logE equals SP+0.8 (SP being defined as the logE at which the optical density equals Dmin+1.0); and (iii) an optical density of at least 3.7 at the point where logE equals SP+1.3.

摘要翻译： 公开了一种照相卤化银材料和使用所述用于乳腺摄影的材料的方法。 照相材料具有较大的动态范围和较高的对比度，从而可以精确地检测出腺体组织深处的病变，并且还清楚地描绘了薄组织，如乳房的皮肤线。 所述照相材料的光密度与对数暴露logE的感光度曲线的特征在于（i）Dmin + 1.0和Dmin + 2.5之间的平均灰度至少为3.5; 和（ii）在logE等于SP + 0.8（SP定义为光密度等于Dmin + 1.0的logE）的点处，0.7至1.8的局部梯度和不高于3.5的光密度; 和（iii）在logE等于SP + 1.3的点处的光密度至少为3.7。