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NEWS 2005

[07/24/2005]

Potential for Real-Time Target Localization in Radiation Therapy Demonstrated

CalypsoR Medical Technologies, Inc., Investigators Present Progress at AAPM 47th Annual Meeting

Seattle, WA - July 24, 2005 - Reports of scientific investigations of CalypsoR Medical's CalypsoR 4D Localization System will be presented at the American Association of Physicists in Medicine (AAPM) 47th Annual Meeting. These abstracts discuss the CalypsoR System with permanently implanted BeaconR transponders, which is designed to provide efficient, objective, accurate and continuous tumor location information for external beam radiation therapy without adding ionizing radiation.

Current methods of marking a tumor's location for radiation therapy use less objective methods such as skin tattoos, snap shot x-ray images, or ultrasound images to align tumor targets prior to treatment. These methods lack the ability to continuously locate the target's movement during treatment. CalypsoR Medical Technologies' investigational platform is expected to provide a way to position patients and continuously track the tumor's position for external beam radiation therapy that is accurate, objective and efficient without an additional radiation dose.

CalypsoR Medical's technology will be highlighted in five technical abstracts presented at the AAPM 47th Annual Meeting at the Washington State Convention & Trade Center in Seattle, July 24 - 28, and published simultaneously in the journal Medical Physics:

• Accuracy and Precision of Implantable Radiofrequency Transponder Localization Measurements Conducted Using Multislice CT
  Presented by Lisha Zhang, PhD,
  Washington University, St Louis, MO;
  July 26, 4:00 PM - 4:45 PM; Exhibit Hall 4A
• Feasibility of Tracking Wireless AC Electromagnetic Transponders in Head and Neck Cancer Environment
  Presented by Timothy Mate, MD,
  Swedish Medical Center, Seattle, WA;
  July 26, 4:45 PM - 5:30 PM; Exhibit Hall 4A
• Dynamic Accuracy of An Implanted Wireless AC Electromagnetic Sensor for Guided Radiation Therapy; Implications for Real-Time Tumor Position Tracking
  Presented by Parag Parikh, MD,
  Washington University, St. Louis, MO;
  July 26, 4:45 PM - 5:30 PM; Exhibit Hall 4A
• Tracking Prostate Motion and Isocenter Offset During Treatment Using the Calypsoｮ 4D Localization System
  Presented by Twyla Willoughby, M. D.
  Anderson Cancer Center-Orlando, Orlando, FL, and
  Steven Dimmer,
  CalypsoR Medical Technologies;
  July 27, 1:15 PM - 3:05 PM; Room 6B
• Guided Radiation Therapy: Organ Motion Tracking with Implanted AC Electromagnetic Transponders
  Presented by J. Nelson Wright,
  CalypsoR Medical Technologies;
  July 27, 3:30 PM - 5:00 PM; Room 6B

The system will be available for demonstration viewing at two booths during the meeting: CalypsoR Medical (No. 217), and Philips Radiation Oncology Systems (No. 801).

CalypsoR Medical recently raised $44 million in venture capital financing and is continuing clinical studies with its investigational device, which is not yet for sale, in leading cancer centers for prostate application.

About CalypsoR Medical Technologies, Inc.

Calypso Medical was founded in 2000 and is a privately held medical device company located in Seattle, Washington. The Company and its employees are dedicated to enabling organ motion monitoring solutions that improve the delivery of radiation therapy throughout the body. Calypso Medical is a pioneer in solutions designed to accurately, objectively and continuously locate and align targets from inside the body without the addition of ionizing radiation. Its AC electromagnetic localization platform, the CalypsoR 4D Localization System with implanted BeaconR Electromagnetic Transponders, received FDA 510(k) clearance July 28, 2006.Learn more about us >>

http://www.calypsomedical.com/

Contact Information:

Lynn Purdy
CalypsoR Medical Technologies, Inc.
lpurdy@calypsomedical.com
(206) 774-4207