In-room imaging and MR planning

Ultra-short TE

T2 values Water: 4000 ms Soft-tissue: 90 ms Achilles tendon: 5 ms Cortical bone: 0.5 ms Ice: 0.015 ms

1

0.9 .

0.8 .

0.7 .

0.6 .

Long T2 (600 ms)

Short T2 (80 ms)

0.5 .

Bone T2 (0.5 ms)

0.4 .

R. Rai et al Med Phys 2017

0.3 .

Signal Intensity Signal Intensit

0.2 .

0.1 .

Solid material becomes visible if we can encode signal rapidly

0

1

2

3

4

200 5

0

50

100

150

TE (ms) (

TE ≤ 0.1 ms (100 µs) is ‘ultra-short’