| Acronym | Meaning |
| VC | Vital Capacity (lung Function) |
| SRH | Spin-adapted Reduced Hamiltonian |
| IRN | Indicator Radionuclide |
| ETB | Extended Tight-binding (method For Electronic-structure Calcns.) |
| CBEC | Concentration-based Exemption Criteria |
| GO-SCF | Gaussian Orbital Self-consistent Field |
| RSF | Radial Structure Function |
| IPC | International Patent Classification |
| AAMI | Association For The Advancement Of Medical Instrumentation |
| QDPT | Quasi-degenerate Perturbation Theory |