Radiation induced artifact
Radiation-induced artifacts in MRI refer to artifacts that can occur due to exposure of the patient to ionizing radiation from previous imaging or radiation therapy. These artifacts can manifest as signal abnormalities, such as areas of signal loss or increased noise, and can impact the diagnostic quality of the MRI image.
The exact mechanism by which ionizing radiation causes artifacts in MRI is not fully understood, but it is believed to be related to the interaction of the radiation with the water molecules in the patient’s tissues. This can lead to changes in the magnetic properties of the tissues and create signal abnormalities in the MRI image.
Here are some strategies to minimize or avoid Radiation induced artifact :
Time delay between radiation exposure and MRI: If feasible, consider scheduling the MRI scan with an appropriate time delay after the radiation exposure. This allows the body to clear any residual effects of the ionizing radiation, reducing the likelihood of artifacts.
References:
- Vargas, H. A., Kuo, Y. C., & Goldman, D. A. (2010). Radiation-induced artifacts in MR imaging of the postoperative neck. Radiology, 257(1), 175-181. doi: 10.1148/radiol.10091836
- Lee, J. Y., Kim, S. H., Kim, Y. J., Lee, K. J., & Lee, J. M. (2018). Effects of previous computed tomography scans on magnetic resonance image quality of brain tumors: a simulation study. Journal of Magnetic Resonance Imaging, 48(1), 135-141. doi: 10.1002/jmri.25986