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Figure 3: Examples of diffusion–perfusion mismatches for three patients are shown. Panel A shows a patient who was imaged 305 min (5 h) from last seen normal and was found to have a mismatch ratio of 3.73. Panel B shows a patient who was imaged 343 min (5.7 h) from last seen normal and was found to have a mismatch ratio of 16.6. Panel C shows a patient who was imaged 271 min (4.52 h) from last seen normal and was found to have a mismatch ratio of 2.80. All three patients presented outside of the 4.5-h time window but had a target that potentially could have benefited from thrombolysis

Figure 3: Examples of diffusion–perfusion mismatches for three patients are shown. Panel A shows a patient who was imaged 305 min (5 h) from last seen normal and was found to have a mismatch ratio of 3.73. Panel B shows a patient who was imaged 343 min (5.7 h) from last seen normal and was found to have a mismatch ratio of 16.6. Panel C shows a patient who was imaged 271 min (4.52 h) from last seen normal and was found to have a mismatch ratio of 2.80. All three patients presented outside of the 4.5-h time window but had a target that potentially could have benefited from thrombolysis