MRI is an abbreviation of Magnetic Resonance Imaging and the images are generated using strong magnetic fields, radio waves and magnetic field gradients. This means that no x-ray radiation is used and MRI is considered safe for most patients.
The most commonly seen MRI scanners can scan all body parts. Full-leg MRI is however very uncommon, as it is rarely medically indicated making it a costly and time-consuming appointment.
Another downside to a full-leg MRI is its inability to define the type of disorders. Scanning a large area means image quantity takes priority over quality and in order to have a precise diagnosis, another MRI of the targeted region is recommended.
Contrast (dye)
Some symptoms and illnesses can be hard to detect even on a MRI scan and require injection of dye (contrast) before or during the scan.
It is particularly helpful in the following conditions:
- Tumours
- Inflammation
- Blood vessels
- Distinguishing between scar tissue and normal organ tissue
The injection is considered very safe for most and you will complete a safety questionnaire detailing your medical history before. The contrast agent (dye) is Gadolinium based and most of it is removed by your kidneys within the next day.
Read more about Gadolinium contrast dye