Figure 1

Comparison of late gadolinium enhancement in the left atrium in patients with and without external beam radiotherapy. Posteroanterior (above) and left lateral (below) views of the atrium of LGE -MRI in patients with a history of radiation (patients 1 and 2) and in control patients (patients 3 and 4) demonstrating increased signal with the radiation exposure. Patients 1 and 2 showed enhancement in 17.15% and 7.72% of the left atrium, respectively, while Patients 3 and 4 showed enhancement in 1.80% and 0.87%, respectively, of the left atrium.