TUSTIN, Calif.--(BUSINESS WIRE)--As a testament to its customer service approach and competitive product portfolio, MD Buyline customers have ranked Toshiba America Medical Systems, Inc. number one in the very competitive CT category, marking the sixth consecutive year that Toshiba has achieved this top ranking. Toshiba’s Aquilion® CT product line received a 9.0 rating, up from 8.7 last quarter.