[Retracted] Magnetic Resonance Neuroimaging Contrast Agents of Nanomaterials

Table 1

Imaging modalities employed in molecular imaging and system of detection.

Molecular imaging mode	Detection method
X-ray computed tomography	X-ray
Single photon emission computed tomography	Low energy gamma rays
Positron emission tomography	High energy gamma rays
Magnetic resonance imaging	Radio frequency waves
Optical imaging	Near infrared light
Ultrasound imaging	Ultrasound