Background
Methods
CMR
Pulse sequences
Parameters | Cartesian | Radial triggered | Retrospective |
---|---|---|---|
TR [ms]
| 5 | 3 | 3 |
TE [ms]
| 1.7 | 1.2 | 1.2 |
Sampling bandwidth [kHz]
| 75.8 | 75.8 | 75.8 |
Flip angle
[°]
| 30-40 | 30-40 | 30-40 |
Echo position
| 25 | 10 | 10 |
[% of the read-out]
| |||
Number of read-out points
| 160 | 90 | 90 |
Number of projections
| 160 | 160 | 16000* |
Number of Cine segments
| 5 | 3 | - |
Frames per Cine Segment
| 8 | 14 | - |
Number of velocity-encoding steps
| 3 | 3 | 3 |
VENC [m/s]
| 1.7 | 1.7 | 1.7 |
Spatial resolution
[
μ
m
2
]
| 150×150** | 150×150
‡
| 150×150
‡
|
Field of view [mm
2
]
| 24×24 | 24×24 | 24×24 |
Slice thickness [mm]
| 1 | 1 | 1 |
Measurement time [minutes]
| 6.7±1.1 | 4.3±0.6 | 2.9 |
Retrospectively triggered measurement
Prospectively triggered measurement
Gradient delay correction
Trigger signal processing
Modified golden angle based radial read-out
Signal processing
K-space selection
Reconstruction
PWV calculation
Animal handling
Results
Discussion
PWV values
Parameters | Results |
---|---|
Weight (g)
| 24.9±3.1 |
Peak CSA [ mm
2
] | |
Cartesian Measurement | 0.75±0.05 |
Radial Triggered Measurement | 0.75±0.04 |
Retrospective Measurement | 0.73±0.04 |
Peak volume flow [ cm
3
/s] | |
Cartesian Measurement | 0.27±0.04 |
Radial Triggered Measurement | 0.28±0.03 |
Retrospective Measurement | 0.28±0.04 |
PWV [m/s]
| |
Cartesian Measurement | 2.4±0.2 |
Radial Triggered Measurement | 2.3±0.2 |
Retrospective Measurement | 2.3±0.2 |