TY  - GEN
AU  - Ketchum,L E
TI  - Smithsonian documents history of PET
SN  - 0161-5505
PY  - 1995///0123
KW  - History, 20th Century
KW  - Humans
KW  - Museums
KW  - Tomography, Emission-Computed
KW  - history
KW  - United States
N1  - Publication Type: Historical Article; News
ER  -