Purpose
b-SSFP (balanced steady-state free precession) cine sequence gives the best image quality for ventricular volumetric and functional evaluation (1).
Cine imaging is part of routine protocol,
and usual don’t require contrast agent.
However in clinical use is possible to acquire cine sequences after contrast administration,
focused mainly to shortening acquisition time (2).
In therm of physics tissue contrast of b-SSFP sequence depend primarily on T2/T1 ratio,
and use of T1-active gadolinium based contrast agents should have impact on blood pool and tissue appearances (3).
Review...
Methods and Materials
Study selection
The history of old myocardial infarction was criteria of prospective selection for dedicated CMR protocol.
Retrospective,
LCE sequences was used for confirmation of transmural lesion and wall thickness,
was used for confirmation of chronic lesion.
The adequate breath hold capability and normal sinus cardiac pace also was considered,
in order to have a good image quality.
Finally in this study were included 51 patients (56 ± 9 y),
with good image quality.
All the studies were performed according to the guidelines of the...
Results
Visual appearances
On cine and CE-cine images transmural scar has two appearances.
In more thin scar was represented by low SI - “dark line”.
Low SI was visualised in 24 cases (47%) of non-contrast cine images,
wall thickness 3.3 ± 1.1 mm and in 15 cases (29%) of CE-cine images,
wall thickness 2.7 ± 0.6 mm (figure 1,
2).
In rest of cases,
more thick scar was hyper intense on non-contrast cine and CE-cine images (4.5 ± 0.8 mm and respective 4.4 ± 1.0 mm)....
Conclusion
Performed CE-cine imaging can be a part of imaging acquisition for clinical evaluation of patient with CMR.
Focused to shorten total examination time,
in other way this strategy can be very useful for patients in bad clinical conditions,
like significant heart failure,
where patient cooperation is progressively decreasing during scanning.
In other hand this kind of images ad new information for more accurate depiction of different pathological findings (fig.
7,
8).
Acquisition of b-SSFP cine images,
actually recommended and used for standard volumetric and functional...
References
Barkhausen J,
Ruehm SG,
Goyen M,
Buck T,
Laub G,
Debatin JF.
MR evaluation of ventricular function: true fast imaging with steady-state precession versus fast low-angle shot cine MR imaging: feasibility study.
Radiology.
2001 Apr;219(1):264-9.
Lasalarie JC,
Serfaty JM,
Carre C,
Messika-Zeitoun D,
Jeannot C,
Schouman-Claeys E,
Laissy JP.
Accuracy of contrast-enhanced cine-MR sequences in the assessment of left ventricular function: comparison with precontrast cine-MR sequences.
Results of a bicentric study.
Eur Radiol.
2007 Nov;17(11):2838-44.
Scheffler K,
Lehnhardt S.
Principles and applications of balanced SSFP...