Evaluation and routine testing in medical imaging departments. Part 3-3. Imaging performance of X-ray equipment for digital subtraction angiography (DSA). Acceptance tests
State system for ensuring the uniformity of measurements. Standard reference data. Parahydrogen, liquid and gaseous. Density, enthalpy, entropy, isochoric, isobaric heat capacities and speed of sound at temperatures from 14 K up to 1000 K and pressures up to 100 MPa
