• Object ID: 00000018WIA30CFD870GYZ
  • Topic ID: id_40026742 Version: 1.4
  • Date: Aug 20, 2022 12:11:21 PM

3D FIESTA scan

The 3DFIESTA sequence is a fully balanced steady-state coherent imaging pulse sequence designed to produce high SNR images at very short TRs. It accentuates the contrast of spins with high T2/T1 ratios (such as cerebral-spinal fluid, water, and fat) while suppressing signal from tissues with low T2/T1 ratios (such as muscle and myocardium).

Use 3D FIESTA for whole body imaging in clinical applications that benefit from the differentiation of contrast between tissues of low T2/T1 ratios (low signal intensity) and high T2/T1 ratios (high signal intensity).

Figure 1. 3D FIESTA images
Table 1. Image legend
NumberDescription
1Cervical spine
2MRCP
3IAC
4Coronary arteries

Consider this information when modifying 3D FIESTA scan parameters. For specific scan parameter values, select a protocol from your GE or Site library.

  • Scan selections: 3D Mode, Gradient Echo family, Fiesta pulse.

Scan parameters

  • Bandwidth: For shortest TR with high-resolution imaging (0.5 mm), use an RBw of 42 kHz. This is due to gradient heating limitations. Otherwise, 125 kHz would give the shortest TR. RBw choices are 125, 100, 83.3, 62.5, 41.57, and 31.25 kHz.
  • Flip angle: To achieve the shortest TR, use a small flip angle (40°) and then increase it in five degree increments to see if SAR limits your min. TR. Compromise should be made between highest flip angle (70°) and shortest achievable TR (< 6).
    • Start with a 40 flip angle and increase it every 5° to see if SAR limits your minimum TR. Compromise between the highest flip angle (70) and the shortest achievable TR (< 6 ms).
  • TR: The advantages of 3D FIESTA can only be realized with very short TR where TR << T2, and TR << 1/b where b is the local frequency shift caused by inhomogeneity.

User CVs

Click the Advance tab to view the available User CVs. The CVs may vary based on the field strength and selected scan and imaging parameters.

Post-process tasks

There are multiple compatible post-process tasks. For details, see Add post-process task.

  • Maximum Intensity Projection
  • Multi Planar Reconstruction
  • Image Enhancement Filters
  • Pasting