Handbook of Biomedical Optics

Diffuse Optical Tomography Using CW and Frequency Domain Imaging Systems 383

is technique, called transilliumination light scanning, or

diaphanography, used projections of CW light from a lamp to

determine areas of high absorption. e pioneering work by

Cutler et al. (Cutler 1929) was followed by Bartrum and Crow

(1984) and others (Alveryd et al. 1990, Gisvold et al. 1986) who

used more modernized equipment to guide visible and NIR light

to the breast with ber optics and detect breast projections with

video equipment. ese studies were suspended aer reporting

lower sensitivity and higher numbers of false positives com-

pared to x-ray mammography (Alveryd et al. 1990), with poor

spatial resolution, even with sophisticated C