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Changes over Time in Lung Scintigraphy Perfusion Imaging. Left image is pre-BPA and right image is 4 months after BPA. This figure shows changes in lung scintigraphy from after PEA to during exacerbation, and at 4 months after BPA. The blood flow in treated regions improved. Abbreviations: BPA, balloon pulmonary angioplasty; PEA, pulmonary endarterectomy.
