. Biophysical science. Biophysics. Absorption due to Soft Tissue only Absorption due to Soft Tissue only Distance Across Trace Path Figure 2. A cross section through the humerus. The upper figure shows the bone and soft tissue distribution. The lower figure shows the optical density of the X-ray film. Based on original data of H. Schraer. The Pennsylvania State Distance Across Trace Path Figure 3. Equivalent wedge thick- ness. This is for the same trace path shown in Figure 2. The abscissa (distance axis) is the same in both figures. The ordinate scales have been adjusted to make
. Biophysical science. Biophysics. Absorption due to Soft Tissue only Absorption due to Soft Tissue only Distance Across Trace Path Figure 2. A cross section through the humerus. The upper figure shows the bone and soft tissue distribution. The lower figure shows the optical density of the X-ray film. Based on original data of H. Schraer. The Pennsylvania State Distance Across Trace Path Figure 3. Equivalent wedge thick- ness. This is for the same trace path shown in Figure 2. The abscissa (distance axis) is the same in both figures. The ordinate scales have been adjusted to make the peaks coincide. and wedge on the picture, then it is possible to determine independently the mass of both the bone and the soft tissue lying around it. A similar procedure has been employed using two wedges, one an analog of the bone and the other an analog of the soft tissue. These are placed in the path of two monochromatic X-ray beams of different wavelengths which pass through the wedges, soft tissue, and bone to scintillation counters. The limb is moved across the beam and the wedges adjusted to give a constant intensity at both wavelengths at the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ackerman, Eugene, 1920-. Englewood Cliffs, N. J. , Prentice-Hall
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