"TATP wields about 85 percent of the explosive power of TNT and can be made in a kitchen or bathroom. A dime-size amount of the explosive can ignite a fireball the size of a basketball."
And one still needs time and temperature control to create TATP.
"In crystalline form, TATP looks like powdered sugar and is difficult to detect in airports; security officials need to examine an exposed surface with a swab kit or other tester to determine its presence."
See that Kippie? The word "x-ray" is copiously absent from the explosives detection method.