To: ekn who wrote (3996 ) 1/12/2000 1:04:00 AM From: ekn Respond to of 4122
UNIVERSITY OF VIRGINIA HEALTH SYSTEM TESTS NEW LASER FOR BREAST IMAGING The University of Virginia Health System is one of only two sites participating in a series of studies to assess the safety and accuracy of laser beams for breast imaging. Findings from the study may eventually result in an effective method of imaging the breast that neither uses ionizing radiation nor requires compression. The laser technology, called computed tomography (CT) laser mammography, allows for images to be displayed digitally and computer enhanced. Investigators hope that the three-dimensional perspective will allow physicians to observe questionable areas of the breast with greater clarity. CT laser mammography images can also be archived onto CD and retained for comparison during subsequent examinations. "We are excited to be participating in this innovative study. Laser mammography may prove to be a very useful means of finding breast abnormalities and specifically detecting breast cancer," according to Dr. Jennifer Harvey, associate professor of radiology and the principal investigator for the study at U.Va. "Additional studies are required before laser mammography will be used clinically, but there is no question that finding an accurate way to image the breast that is safer and less painful would be a significant development in women's health." The study will evaluate the appearance of normal and abnormal breast tissue as seen in images produced by the CT laser mammography device. These images will be compared with the appearance of regular mammograms and any other breast imaging techniques performed, including ultrasound and MRI. For the study, patients lay on their stomach on a scanning table placing one breast through a hole in the table into the scanning chamber. The laser beam sweeps 360 degrees around the breast in a horizontal plane. Each sweep takes approximately 45 seconds and focuses on a four-millimeter section of the breast. The laser continues to sweep sections of the breast until the entire breast from the chest wall to the nipple is imaged. An image of one breast takes between ten and fifteen minutes. The other breast is then placed in the scanning chamber and imaged. U.Va. began the study this week. Women who have had recent mammograms will be contacted for possible participation. Theoretical and experimental studies indicate there are no adverse reactions to the laser energy used in this device. Patients will be asked questions after the study to assess any physical sensation experienced as a result of exposure to the laser beam. CT laser mammography was developed and patented by Imaging Diagnostic Systems, Inc. of Plantation, Florida. November 17, 1999