Quantitative Assessment of Percent Breast Density: Analog versus Digital Acquisition

Analog versus Digital

In the digital world we distinguish two discrete values a signal can have, 0 or 1, and these values correspond to certain voltages. The mapping between the voltage on a point and the digital value it represents is determined by the electronics family the circuit is built in and the supply voltage [1]. This chart gives the HIGH (often “1”) and LOW (often “0”) values and thresholds for most logic...

Analog versus Digital

W hen considering alternative approaches to the design of dimmable electronic ballasts for fluorescent lamps, the lamp power regulation method employed is the critical factor. It determines the linearity (i.e., the linear response of the light output with the dimming control input), the smoothness of dimming and, most importantly, the stability of the light output. Both digital and analog appro...

static versus dynamic assessment of l2 learners’ reading ability

dynamic assessment according to vygotskys sociocultural theory, states that instruction and assessment are interrelated. using static forms of assessment with second and foreign language students could do more harm than good. many teachers neglect to take account of the complexity involved in learning a second or foreign language and often wonder why learning of a language take so long. thi...

Comparison of Breast Percent Density Estimated from Digital Mammograms and Central Reconstructed Tomosynthesis Slice Images

We analyzed breast percent density (PD) estimated from 35 women with existing or recently detected abnormalities. Analyzed were digital mammograms (DM) and the central digital breast tomosynthesis (DBT) reconstructed slices. PD was estimated from the breast contralateral to cancer. We have examined the effect of modifying the DBT reconstruction filter on the accuracy of dense tissue segmentatio...

Impact of quantitative breast density on experienced radiologists' assessment of mammographic breast density