From the Research
The copper intrauterine device (IUD) can influence medical imaging, but it is considered safe for MRI procedures and does not need to be removed before scanning, as supported by the most recent study 1.
Influence on Medical Imaging
The copper IUD is visible on X-rays, CT scans, and ultrasounds, appearing as a T-shaped metallic object within the uterus. This visibility is actually beneficial for confirming proper placement of the device.
- The copper component may cause minor local artifacts or distortions in the immediate area around the IUD on MRI images, potentially affecting the detailed visualization of the uterus and surrounding structures.
- These artifacts are typically minimal and localized, so they generally don't interfere with imaging of other pelvic or abdominal structures.
Safety in MRI Procedures
According to the most recent study 1, copper IUDs are considered safe for MRI procedures and do not need to be removed before scanning, as copper is non-ferromagnetic and will not move or heat up significantly in the magnetic field.
- The study found that performing 3 Tesla MRI using a low SAR setting does not cause displacement of copper IUDs, with zero out of 70 patients demonstrating IUD displacement.
- Patients should always inform their healthcare providers about having a copper IUD before undergoing any imaging procedures to ensure proper interpretation of the images and to address any specific concerns related to their particular imaging needs.
Comparison with Other Studies
Other studies, such as 2 and 3, also support the safety of copper IUDs in MRI procedures, but the most recent study 1 provides the strongest evidence for their safety.
- The study 2 found that copper IUDs do not pose a significant risk for patients during MR and CT examinations, but it was a phantom study and not an in-vivo study like 1.
- The study 3 found that copper IUDs can be considered as conditional for MR safety at 1.5 T and 3.0 T, but it was a study of MRI safety and not a study of the influence of copper IUDs on medical imaging like 1.