Thanks for the ranking. I've submitted 3 versions of the logo which shows how it can be used in different situations. ie. from plain black & white to more stylised potentional website version.
I've introduced an atom / or material to give the abstract, analytical feel. Laser / waves penetrating etc...... Let me know what you think. Cheers, Craig
Another idea for you.... I've tried to incorporate both the atoms and the X-ray side of your business. The circle symbolizes the X-ray machine scanning the letter X :)