TY  - RPRT
TI  - An electron density calibration phantom for CT-based treatment planning computers.
AU  - C Constantinou
AU  - J C Harrington
AU  - L A DeWerd
DO  - 10.1118/1.596862
UR  - https://pubmed.ncbi.nlm.nih.gov/1584125/
ID  - 1584125
ER  -