Type:
Poster Presentation
Keywords:
Image verification, Technical aspects, Computer Applications-General, MR, Cardiac, Tissue characterisation
Authors:
P. Triadyaksa, A. Handayani, T. Willems, P. M. Van Ooijen, M. Oudkerk, P. E. Sijens; Groningen/NL
Results
- Regardless of subjective selection,
inter-observers correspondence in CNR-optimized composite image shows better reproducibility (DSC improvement) of short axis LV-myocardial contour segmentation (Table 1).
- For observers selecting the same image,
there is no significant difference between experienced observers with regards to the goodness of DSC with the composite image method but the correspondence between the composite image ROIs shows DSC improvement for less experienced observers (Table 1).
- However,
when the selected images differ,
the correspondence between the composite image ROIs significantly exceeds that between the subjectively chosen image ROIs for both degrees of observers experience (Table 1).
- The median myocardial iron T2* of all slices shows no significant different for both image selection and CNR-optimized composite selection improves the precision of T2* calculation.
(Table 2).
Table 2 Myocardial iron T2* from subjectively-chosen and CNR-optimized composite image.
|
Myocardial iron T2* (ms) |
p(pW-test) |
Subjectively-chosen image |
CNR-optimized composite image |
median |
32.94 |
31.56 |
0.113 |
median absolute deviation |
1.79 |
1.08 |
0.004 |