Table 2.

Imaging labels and their potential therapeutic properties.

	Imaging Labels	Therapeutic Properties
Nuclear Imaging	Radioactive Isotopes	Radiotherapy
MRI	Lanthanide metal ions, including Gd2+, Mn2+	Radiosensitizing
	Iron oxide nanoparticles	Photodynamic therapy
		Magnetic hyperthermia treatment
	Labile protons	Magnetic targeting
Ultrasound	Phase-transition material Calcium carbonate	US-triggered release Physical shock High-intensity focused ultrasound therapy
Optical or optoacoustic	NIR dyes	Photothermal therapy
	Metallic and inorganic NPs, e.g., gold nanorod, quantum dots	Photodynamic therapy