title: Photon-deficient areas around the heart.
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D010490:Pericardial Effusion / Q000000981:diagnostic imaging / Q000209:etiology; D011877:Radionuclide Imaging