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[18F]-ET-1 microPET images: (a) whole-body distribution in four coronal planes; (b) distribution after injection of BQ788 revealing the lack of tracer displacement in the lung; (c) blockade of binding in the lung and kidney and increased uptake in the liver after preinjection of BQ788; visualisation of ET receptors in the heart after preinjection of BQ788 in coronal (d), sagittal (e) and transverse planes (f). Scale bars=10 mm.
