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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