converting rasiation enery to light enery

hi all,
Do we have any latest and efficient technology which converts the radiation energy such as X ray to the light energy?

Yes, we have such materials that convert high-energy photons of X-rays to visible or IR band; they are called "scintillators".

According to quantum theory and Einstein's formulas of stimulated and spontaneous emission, it is natural that atoms excited by external radiation can radiate the acquired energy at other wavelengths. The easiest way is to irradiate the atoms with higher-energy photons (like X-ray) and they emit the excess energy at other wavelengths, with lower-energy photons.
Similar "frequency conversion" is the base of fluorescence, too.

Hi thank u for that valuable point..
One more question is
In all machines they use some material to convert radiation enery to visible light and do imaging...Do we have anymaterial using which we can image directly without converting to visible... First of all is it possible to image using radiations in high enery band..

To my knowledge there are IR CCD sensors and cameras available, recently also devices for UV range. It seems that X-ray matrix-type sensors will be available soon.
Please try Google to find the new developments.