The marginally significant disparity of 13 NH 3 vs DB DCE-MRI MBF at only 12 months may be due to the intrasubject biological variations between the two modality measurements, in which DCE-MRI depends on functional capillary density, while 13 NH 3 depends on the glutamine synthetase reaction in the myocardial tissue.
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Changes in myocardial blood flow in a canine model of left sided breast cancer radiotherapy.
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