These provide a digitized image of the breast, which has more clarity than the x-ray image traditionally used in mammograms. About 32% of all mammogram clinics in the US now have at least one "digital machine." (NYT 4/10/08)
CT Lung Scans
These scans also provide more clarity than traditional x-rays and some experts argue that CT Scans detect more Stage 1 lung cancer, which can lead to more surgical solutions.
Colon "Flat Growths"
Colonoscopies mainly detect polyps (often precancerous) that protrude from the colon wall. But the test misses growths that are flat against the colon wall -- even though they may be the most dangerous abnormalities in the colon.