Fig. 1
From: Efficacy of 99mTc-DTPA SPECT/CT in diagnosing Orbitopathy in graves’ disease
99mTc-DTPA SPET/CT scintigraphy of the orbital cavity in coronal planes. All the rectus muscles of the eye are thickened: a) with increased accumulation of 99mTc-DTPA only in the medial and superior muscles of the right eye, which is indicative of active GO in the medial and superior muscles. b without increased accumulation of 99mTc-DTPA, which is indicative of non-active GO. The physiological 99mTc-DTPA uptake of nasal mucosa is visible at both cases. Abbreviations: MRI = magnetic resonance imaging; SPECT-CT = fused single photon emission computed tomography with computed tomography; GO = Graves’ orbitopathy; 99mTc-DTPA = diethylenetriaminepentaacetic acid tagged with 99mTc