Dicom integration

Hi., I integrate dicom in my rails application that purpose i install RMagick gem then the following errors are came. C:\Ruby187\bin>gem install RMagick Temporarily enhancing PATH to include DevKit... Building native extensions. This could take a while... ERROR: Error installing RMagick:         ERROR: Failed to build gem native extension.         C:/Ruby187/bin/ruby.exe extconf.rb checking for Ruby version >= 1.8.5... yes Invalid drive specification. Unable to get ImageMagick version *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options:         --with-opt-dir         --without-opt-dir         --with-opt-include         --without-opt-include=${opt-dir}/include         --with-opt-lib         --without-opt-lib=${opt-dir}/lib         --with-make-prog         --without-make-prog         --srcdir=.         --curdir         --ruby=C:/Ruby187/bin/ruby

Gem files will remain installed in C:/Ruby187/lib/ruby/gems/1.8/gems/rmagick-2.1 3.1 for inspection. Results logged to C:/Ruby187/lib/ruby/gems/1.8/gems/rmagick-2.13.1/ext/RMagick/g em_make.out can any one please suggest me a proper solution. Thank you.