By:
On:
In: Quick Answer
With: 0 Comments

Target. Need material that produces characteristic x-rays with energies of 17-20 keV (20-30 keV for larger breasts) to produce the best contrast. The commonly used material is Molybdenum (characteristic x-rays at 17.5 and 19.6 keV). What is the K edge in mammography? The K-absorption edge (K-edge) refers to the abruptRead More →

By:
On:
In: Quick Answer
With: 0 Comments

However, even though writing pencils made of graphite were first used around 1565, writing pencils that used lead were still in very common use in the 18th century. When did lead stopped being used in pencils? The mixture is then dipped in oil or wax to help create a moreRead More →