Systems which first popularized the very concept of Open MR Because of its dependability, the MRP-7000 remains popular more than a decade after the first U.S. system was shipped. In fact, an overwhelming percentage of the MRP systems sold in the U.S. are still performing clinical scans today. This, combined with the tendency of all Hitachi MR systems to maintain high resale values, has made this system one of the most sought-after scanners on the used equipment market.