Title: Nanodots: Ultrasmall NaGdF₄ Nanodots for Efficient MR Angiography and Atherosclerotic Plaque Imaging

Abstract: As shown by J. Shi, W. Bu, and co‐workers on page 3867, ultrasmall NaGdF₄ nanodots (ca. 2 nm) with diethylenetriaminepenta‐acetic acid (DTPA) conjugation are synthesized for efficient magnetic resonance (MR) angiography. Impressively, the r₁ value in magnetic resonance imaging (MRI) reaches up to 8.93 mM⁻¹ s⁻¹. The ultrasmall vessel lumen of a rabbit is lit up remarkably. After 3 h, atherosclerotic plaques can be discriminated clearly. This is quite favorable for the accurate early diagnosis of vascular pathema.