Biomedical Engineering Reference
In-Depth Information
figure 1.4
first human PeN scanner PeTT III (1974) located in the hall of the Department
of radiology Washington University School of Medicine in St. louis, where this scanner had
been invented. The inventors had given the name “positron emission transaxial tomography”
(PeTT). The name was reduced to PeT because transaxial was no longer the only plane used
for image reconstruction. (
See insert for color representation of the figure.)
)
Fatty acid chains
Glycerol
Phosphate and choline
O
O
CH
3
O
P
CH
2
CH
2
N
CH
3
O
O
O
O
CH
3
H
O
Lecithin
figure 1.5
Structure of a multilamellar liposome and of a typical lecithin component
phosphatidylcholine. The latter is composed from choline and phosphate group, glycerol, and
long-chain fatty acid. lecithin was first isolated in 1846 by the french chemist and pharmacist
Theodore gobley.
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