Protocols
The T1-Weighted Images and True FISP Cines were acquired using a breath-hold retrospectively gated steady state free precession anatomical spin echo sequences with a phased array surface coil and ECG-R wave triggering. MR tagging requires the application of additional spatial modulating gradient, (cSPAMM) to create the image voids of the tags and the Phase Contrast MR's applies a velocity encoding gradient in the through plane direction. Typical pulse sequence parameters are listed below:
Pulse Sequence Parameters
The following table contains detailed information about the 4 different pulse sequences used to create the Cardiac Atlas.
T1 Weighted Image |
True FISP Cine |
Phase Contrast |
Tagging |
|
|---|---|---|---|---|
Manufacturer |
SIEMENS |
SIEMENS |
SIEMENS |
SIEMENS |
Institution name |
Centre for Advanced MRI Auckland |
Centre for Advanced MRI Auckland |
Centre for Advanced MRI Auckland |
Centre for Advanced MRI Auckland |
Series description |
tse_11_db_t1_coronal |
tf2d15_retro iPAT LA |
fl3_150_through-p_AORTA_P |
fl2d9_grid_la |
Manufacturer model name |
Avanto |
Avanto |
Avanto |
Avanto |
Scanning sequence |
Spin Echo |
Spin Echo |
Gradient Echo |
Gradient Echo |
Sequence variant |
SK\SP\OSP |
SK\OSP |
SK\SP\OSP |
SK\SP\OSP |
Scan options |
DB\CT |
CT |
CT |
G7\CT |
MR acquisition type |
2D |
2D |
2D |
2D |
Sequence name |
*tse2d1_11 |
tfi2d1_9 |
fl2d1_v200in |
fl2d1r7 |
Slice thickness |
6mm |
6mm |
8mm |
8mm |
Repetition time (TR) |
944.1msec |
27.2msec |
28msec |
37msec |
Echo time (TE) |
29msec |
1.28msec |
3.2msec |
3.8msec |
Averages |
1 |
1 |
3 |
1 |
Imaging frequency |
63.68MHz |
63.68MHz |
63.68MHz |
63.68MHz |
Imaged nucleus |
1H |
1H |
1H |
1H |
Magnetic field strength |
1.493999958Tesla |
1.493999958Tesla |
1.493999958Tesla |
1.493999958Tesla |
Echo train length |
11 |
1 |
1 |
1 |
Percent sampling |
100% |
100% |
80% |
75% |
Percent phase FOV |
100% |
81.25% |
75% |
81.25% |
Pixel bandwidth |
305Hz |
930Hz |
390Hz |
185Hz |
Protocol name |
tse_11_db_t1_coronal |
tf2d15_retro iPAT LA |
fl3_150_through-p_AORTA |
fl2d9_grid_la |
Trigger time |
612.5msec |
409.5msec |
0.001msec |
45msec |
Nominal interval |
939msec |
1009msec |
817msec |
875msec |
Number of images |
1 |
32 |
25 |
20 |
Transmitting coil |
Body |
Body |
Body |
Body |
Flip angle |
180 degrees |
75 degrees |
30 degrees |
11 degrees |
SAR |
0.967950165 |
3.965087652 |
0.15162967145443 |
0.052100766 |
Rows |
256 |
208 |
192 |
208 |
Columns |
256 |
256 |
256 |
256 |
Pixel spacing |
1.3671875mm\1.3671875mm |
1.25mm\1.25mm |
1.3671875mm\1.3671875mm |
1.328125mm\1.328125mm |