1170 / 1363
Temporal resolution:
The temporal resolution should be less than 10 sec.
Flip angles:
Smaller flip angles will lead to potential saturation of the signal intensity vs. gadolinium
concentration, particularly in vessels. Note should be made that SAR limits may affect the maximum
allowable flip angle. Operators should use the maximal allowed flip angle when SAR limitations occur.
Flip angles ranging from 25-35 degrees are recommended in order to minimize saturation effects and
to avoid specific absorption rate (SAR) problems.
Receiver Bandwidth
: Greater or equal to
±
31.25 kHz (or ~250 Hz/pixel)
Field of View (FOV) and Partial Fourier (“fractional echo” and/or reduced phase-encoding FOV) as
needed to meet temporal resolution requirements
Number of Slices:
Acceptable: ≥10 prior to zero fill. Ideal: as many as possible while maintaining ideal
temporal resolution.
Slice thickness
:
Ideal
: <5 mm,
Target
: 5.1-6 mm,
Acceptable
: 6.1-8 mm
Matrix:
256 x 160 (before applying rectangular FOV) – in order to meet 1-2mm in-plane spatial
resolution
Number of acquisitions (phases):
Sufficient to allow acquisition of at least 5 minutes of
post injection data plus at least 5 phases acquired before contrast agent injection (baseline
images).
Digitized bit depth:
The maximum dynamic range should be utilized, e.g., “extended
dynamic range” or equivalent.
Temporal resolution < 10sec.
Dynamic series
http://www.rsna.org/QIBA_.aspxParameter
Compliance
Levels
TE
Acceptable
2.0-2.5ms
Target
1.5-2.0ms
Ideal
<1.5ms
Parameter
Compliance
Levels
TR
Acceptable
5-7ms
Target
3-5ms
Ideal
< 3ms