xdesign.acquisition
xdesign.codes
xdesign.constants
xdesign.formats
xdesign.geometry
xdesign.material
xdesign.metrics
xdesign.phantom
xdesign.plot
xdesign.recon
Constants in cgs units.
Avagadro constant [1/mol]
float
Boltzmann constant [erg/k]
Classical electron radius [cm]
Electronic charge [esu]
Electron volt (keV) [erg]
Electron mass [g]
Fine structure constant
Reduced planck’s constant [keV*s]
Proton mass [g]
Speed of light in vacuum [cm/s]
Thomson cross section [cm^2]
Ratio of a circle’s circumference to its diameter
Return wavelength [cm] of light given energy [keV].