The difference between CT and MRI is mainly in the imaging principle, radiation dose, examination area, examination time and examination cost.
1. Different imaging principles: CT uses X-ray scanning of human tissues, computer processing, reconstruction of different densities, different shades of gray of the image, while the MRI is the use of hydrogen nuclei in the body tissues in the role of a specific radio frequency pulse generated by the magnetic resonance phenomenon, through the acquisition of professional equipment, the formation of images.
2. Different radiation: MRI is the use of magnetic resonance principle, there is no radiation damage to the human body. While CT utilizes X-ray imaging, there is radiation damage, but within the acceptable range of the human body.
3. Different examination applications: CT is better than MRI in displaying lung texture and small lesions in the lungs, while MRI is generally more advantageous for soft tissue examination.
4. Different examination time and cost: CT examination time is shorter, usually takes 2~5 minutes; MRI examination time is longer, usually takes 10~30 minutes, and the price of MRI is obviously more expensive than CT.
CT and MRI have their own advantages, and it is recommended to choose the examination that suits your condition under the guidance of specialized physicians.