About DOSI [DOC]

Other common names:           DOSI Scan
                                                Laser Breast Scan (LBS)

Description:    Diffuse Optical Spectroscopic Imaging (DOSI) is a non-invasive breast scanning technology based on near infrared light (NIR) and advanced laser technology. DOSI measures the biochemical composition of breast tissue, specifically the amount of water, lipid, and hemoglobin in the scanned tissue. These measurements are used to form functional images that reveal the supply of blood and the utilization of oxygen in breast tissue. This information allows doctors to distinguish between tumor and normal tissue, and assess the response of tumors to chemotherapy. DOSI is a hand-held, portable device which does not require compression of the breast. DOSI can be used in a variety of settings, including a clinic, imaging center or physician’s office.
Example of uses:        DOSI is being studied in the screening or monitoring of:
·        breast cancer
·        skin cancer
·        brain blood flow
Preparation: There is no preparation required for this scan.
During the Exam: For a breast DOSI scan, you will be asked to recline in a comfortable chair. A small hand-held scanner will be moved over the area to be scanned in a specific pattern with no compression.
Time Required for scan: 20-40 minutes
Noise During Exam: None
·        DOSI is non-invasive
·        DOSI does not use ionizing radiation
·        DOSI is a portable scan and can be done in a variety of locations
Risks: There are no known harmful effects for DOSI scans
Results: Since DOSI is an investigational technology, results are considered investigational and can not be used to make treatment decisions at this time. Results of the DOSI scan will contribute to the study of DOSI as a breast imaging technology.

This information, as well as additional imaging descriptions, can be found under the Patients section on the ACRIN Web site:

The development of lay imaging descriptions is a project of the 
American College of Radiology Imaging Network
Patient Advocacy Committee.