Figure 3. MRI of the same patient as Figure 2. (a) The unenhanced T₁ weighted spin echo image (TR 620 ms, TE 14 ms) of the liquefied progressive massive fibrosis (PMF) demonstrates a heterogeneous signal intensity with isointensity to the muscles in the upper part and signal loss in the dependent part of the lesion. Note the small high signal outer rim of the PMF. (b) A high signal intensity in the upper part of the lesion on the T₂ weighted image (single shot fast spin echo/90 with TR>20 000 ms, TE 94 ms).