Exploring intrinsic MR signal relaxation in acute RF ablation lesions using T2 mapping and IR-SSFP CINE imaging

Table 1 T2 and M0 in remote, edema and ablation zones.

Area of myocardium	T2 in ms: Mean (Range)	M0 map: Percentage increase of mean signal of ROI compared to remote zone. [ 100*(ROI- ROI_remote)/ROI_remote ]
Remote zone	47 (42-53)	0%
Edema zone	79 (65-103)	31%
Ablation zone	83 (69-98)	85%

The table shows the values of T2 and M0 in the ablation, edema and remote zones. The ablation zone was defined as the area of high signal intensity on M0map near the ablation as confirmed by LGE and pathology. The edema zone was defined as the area of high T2 values near the ablation. It surrounds the ablation zone. The remote zone was defined on the same slice far from the ablation. Note that in the ablation zone, M0 increased by 85%, in the edema zone about 30%. The T2 values increased in the ablation and edema zones by about the same amount (30-35 ms).

ISSN: 1532-429X