Difference between revisions of "MR Acquisition Protocols"
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| + | == Generic dynamic protocol == | ||
| + | 1.5 Tesla | ||
| + | 3D spoiled gradient echo | ||
| + | Body XMT | ||
| + | Phased array RCV | ||
| + | Quiet breathing | ||
| + | No parallel imaging | ||
| + | No magnetization preparation | ||
| + | Oblique coronal | ||
| + | Frequency encode S/I | ||
| + | TE as short as possible (1-3 ms) | ||
| + | TR as short as possible (5-7 ms) | ||
| + | Temporal resolution ≤10 sec | ||
| + | SNR/DR trade-off flip angle (30 degree) | ||
| + | ±31.25 kHz receiver bandwidth (i.e., 250 Hz/pixel) | ||
| + | Region appropriate FOV (pilot 40 cm for body) | ||
| + | 80% FOV for acquisition (may need to adjust arm position to avoid wrap-around) | ||
| + | Partial Fourier as needed | ||
| + | As many slices per acquisition as possible (~12 prior to zero fill) | ||
| + | 5-8 mm slice thickness | ||
| + | 256 X 160 acquisition matrix (i.e., 1.56 mm × 2.00 mm pixel size) | ||
| + | Zero fill in slice direction (ZIP2) | ||
| + | [For phantom, also zero fill in plane (ZIP512)] | ||
| + | Acquire data for 10 minutes, inject at 1 minute | ||
| + | |||
| + | == Generic ratio protocol == | ||
| + | These images will be acquired prior to contrast injection | ||
| + | All parameters the same as for dynamic protocol except: | ||
| + | 15 degree flip angle | ||
| + | 8 NEX (averages) | ||
| + | Repeat second time with body RCV | ||
| + | |||
| + | |||
| + | == Generic T1 protocol == | ||
| + | These images will be acquired prior to contrast injection | ||
| + | All parameters the same as for dynamic protocol except: | ||
| + | 3, 6, 9, 15, 24, 35 degree flip angles (may need to be adjusted | ||
| + | – look-up table dependent on TR and scanner) | ||
| + | 4 NEX | ||
| + | |||
| + | |||
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Revision as of 17:12, 6 October 2008
Generic dynamic protocol
1.5 Tesla 3D spoiled gradient echo Body XMT Phased array RCV Quiet breathing No parallel imaging No magnetization preparation Oblique coronal Frequency encode S/I TE as short as possible (1-3 ms) TR as short as possible (5-7 ms) Temporal resolution ≤10 sec SNR/DR trade-off flip angle (30 degree) ±31.25 kHz receiver bandwidth (i.e., 250 Hz/pixel) Region appropriate FOV (pilot 40 cm for body) 80% FOV for acquisition (may need to adjust arm position to avoid wrap-around) Partial Fourier as needed As many slices per acquisition as possible (~12 prior to zero fill) 5-8 mm slice thickness 256 X 160 acquisition matrix (i.e., 1.56 mm × 2.00 mm pixel size) Zero fill in slice direction (ZIP2) [For phantom, also zero fill in plane (ZIP512)] Acquire data for 10 minutes, inject at 1 minute
Generic ratio protocol
These images will be acquired prior to contrast injection All parameters the same as for dynamic protocol except: 15 degree flip angle 8 NEX (averages) Repeat second time with body RCV
Generic T1 protocol
These images will be acquired prior to contrast injection
All parameters the same as for dynamic protocol except:
3, 6, 9, 15, 24, 35 degree flip angles (may need to be adjusted
– look-up table dependent on TR and scanner)
4 NEX
Back to DCE-MRI