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Table 1 Sequence parameters

From: Real-time assessment of right and left ventricular volumes and function in children using high spatiotemporal resolution spiral bSSFP with compressed sensing

 

Standard BH technique

Spiral real-time technique

Field of view (mm)

350

350

Rectangular field-of-view (%)

75

100

Matrix size

240 × 180

208 × 208

Number of slices

~ 13 (range: 10–17)

~ 13 (range: 10–17)

Image resolution (mm)

1.46 × 1.46 × 8

1.68 × 1.68 × 8

TE/TR (ms)

1.16/2.32

0.67/3.34

Flip Angle (degree)

67

67

Pixel Bandwidth (Hz/pixel)

1225

1502

Cardiac gating

Retrospective

Temporal resolution (ms)

29.48

30.06

Reconstructed cardiac phases

40

~ 24 (range: 20–37)

Trajectory

Cartesian

Spiral

Fully sampled spiral interleaves

72

GRAPPA

×2

Compressed Sensing

×8

Breath-hold time per slice (sec)

3.6–8.8

Total acquisition time for SAX (sec)

~ 350 (range: 239–573)

~ 20 (range: 11 to 36)

  1. BH, breath hold; TE, echo time; TR, repetition time, GRAPPA, generalized autocalibrating partially parallel acquisition