- Poster presentation
- Open Access
Estimation of the flow motion in SSFP images using moving shadows; reliable or not?
© Ahmadinia and Moghaddam; licensee BioMed Central Ltd. 2015
- Published: 3 February 2015
- Peak Velocity
- Blood Pool
- Phase Encode
- Flow Motion
- Bloch Equation
SSFP plays an important role in cardiovascular MRI due to its high speed and unrivaled contrast between blood and myocardium. Some "flow artifacts", however, rises because blood flow prevents spins from reaching the steady state. One artifact in this category is the moving shadows in the blood pool that appear to represent the actual flow behavior. In this study, we show that the shadows are not necessarily representing actual flow behavior. Therefore, cardiologists should consider the moving shadows cautiously to avoid misinterpretations.
As figure 2 illustrates, shadows move toward right proportional to the in-plane velocity (figure 2 frames 1, 3, 5, 7, 9) for half of the period and after reaching the peak velocity, while the reference flow is still moving toward right, they seem to return to left (compare frames 11 and 13). This can result in some improper judgments about the direction of the flow.
In cardiac imaging with SSFP sequence, flow artifacts appear in images since fluid motion prevents spins to reach steady state. One should note that flow artifacts showing themselves as moving shadows, are not always reliable for considering actual flow behavior. We showed the shadows motion could be in the opposite direction of actual flow.
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