Table 1.

The in vivo NIR imaging with different nanoprobes.

Type	NIR Windows	Nanoprobe	Dose	Emission	Ref.
Organic dye	NIR-I	IR dyes	1 μM *	650–950 nm	[42,43,44,45,46,47,48,49,50,51,52]
		Cy5.5	2 mg/mL	690–750 nm	[53,54,55,56,57]
		ICG	200 nmol/kg	750–950 nm	[58,59]
		MMP	20 nM	750 nm	[60]
		SiNC	1 mg/kg	600–800 nm	[61]
	NIR-II	New designed IR dyes	10 mM	900–1400 nm	[62,63,64]
Lanthanide-doped nanoparticle	NIR-I	Tm-doped	15 mg/kg	800 nm	[65]
	NIR-II	Nd-doped	1 mg/mL	1060 and 1340 nm	[66,67,68]
	NIR-III	Er-doped	5 mg/mL	1525 nm	[69]
Quantum dot	NIR-I	Ag2S	1 mg/mL *	650–840 nm	[70]
	NIR-II			1000–1400 nm	[71,72,73]
		N,B-doped graphene quantum dot	1 mg/mL	950–1100 nm	[74]
Nanophosphor	NIR-I	Cr3+-doped	250 mg/mL *	650–850 nm	[75]
Polymer dot	NIR-II	Aggregation-induced emission (AIE)	10 mg/kg *	800–1600 nm	[76,77,78,79]

* The dose concentration is selected from one of the references.