The short answer is "possibly", as not all monitors can be converted into a touch screen.
Below are guides that may help you.
Monitors from 32" to 98"
For those customers who have a large-format LCD or plasma monitor and wish to convert it into a touch screen, we can supply a simple frame from PQ Labs that can be fitted in minutes and will convert most professional monitors from 32" up to 98" into a multi-touch touch screen monitor.
Installation is very easy:
The frame is fitted over the monitor, secured by straps and a USB cable plugged into the PC. Full details on the PQ Labs G5 Series touch frame installation procedure, plus a guide to help you select the correct frame for your monitor, can be found in the section Overlay Touch Screens.