3. Radiography

Table 2 provides an introduction to the physics of medical radiology (source NIST/ICRU44). The attenuation α ^–1 corresponds to the thickness passed through at 63% attenuation [MED 200] . The values quoted for bone correspond to very compact cortical bone (density 1.92), but these values extrapolate to densities between 1.5 and 3 by a simple rule of three (bones have an average density of around 1.80 to 1.85 g/cm ³ , 1.65 in low-density cases). In practice,...