Assessing breast tissue oxygenation using inspired gas stimulation with NIR tomography

The dynamic vascular change in the breast induced by prospectively targeted and sustained end-tidal partial pressures of oxygen and carbon dioxide are imaged by a fast frame rate frequency domain tomographic system. The results of a particular normal subject case show that under the inhaled gas stimuli the maximum changes of deoxy-hemoglobin, oxygen saturation, oxy-hemoglobin and total hemoglobin in the breast are 20%, 9%, 7% and 3%, respectively.

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