Comparison between 2d-psir and 2d-ir magnetic resonance imaging in the evaluation of myocardial enhancement

Aims and objective: Assessment of late gadolinium enhancement of myocardium in ischemic and non-ischemic cardiomyopathies holds a strong diagnostic and prognostic importance specially in terms of viability. The present study focused on comparison between the post contrast sequence for detecting infarcted or fibrosed myocardium tissue, for proper identification of LGE is important to narrow down the differential diagnosis.
Our main aimwas to provide a comparison between 2D-PSIR and 2D-IR Magnetic resonance imaging in the evaluation of myocardial enhancement
Materials and Methods: 40suspected cases of ischemic & non-ischemic cardiomyopathy underwent CMR with contrast.
For all cardiomyopathies their LGE pattern was assessed by 2DPSIR and 2D-IR sequences. Further image quality assessment was done at qualitative, inter-observer and quantitative levels for both the sequences
Results: Kendall Tau-b showed poor agreement between qualitative variability of overall image quality in PSIR & IR, (Kendall's tau-b = 0.23**, p = 0.046) PSIR showing significantly better over-all image quality which are independent of nulling time selection.
There was significant difference in quantitative assessment that is CNR for PSIR v/s IR was (p<0.001) A good inter-observer agreement for PSIR and IR image quality assessment (kendall tau-0.74, p<0.001).
Conclusion: To our best knowledge, this is the first prospective studyto compare 2D-PSIR and 2D-IR sequences at 1.5T with delayed contrast–enhanced cardiac magnetic resonance (MR) imaging value in the evaluation of ischemic and non-ischemic causes of cardiomyopathies, with respect to presence &extent of LGE and viability assessment.PSIR revealed a better imaging quality with higher diagnostic confidence than IR images in terms of artifacts, sharpness and over all quality.