Table 2: MR imaging parameters for contrast-enhanced 3D sequences.

 

Parameter

T2-prepared SSFP

IR SSFP

Repetition time/echo time (msec)

4.7/2.4

4.5/2.1

Flip angle (degrees)

90

90

Bandwidth (Hz/pixel)

542

542

Field of view (mm)

340 340

340 340

Voxel size (mm)*

1.4 1.4 1.4

1.4 1.4 1.4

Acceleration factor for SENSE

4

4

Acquisition time (sec)

240-255

230-248

Navigator efficiency (%)

52 8

53 9

 

Acquisition parameters relevant to image analysis were identical for the T2-prepared SSFP and IR SSFP sequences. The inversion time for the IR SSFP sequence was 260-280 msec. The acquisition window of the navigator was 5 mm. Two consecutive phases were acquired at contrast-enhanced MR angiography.

 

*Acquired as over contiguous sections.