Radiography
X-ray medical imaging. Equipment and modalities

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/cm³, 1.65 in low-density cases). In practice, iodine is present in a complexed form (often iohexol or an equivalent product:...