Question

What medical imaging technique combines MRI with a contrast medium to locate problems with blood vessels?

1) CT scan
2) Ultrasound
3) PET scan
4) MRA

Answer 1

MRA (Magnetic Resonance Angiography) is the medical imaging technique that combines MRI with a contrast medium to locate problems with blood vessels.

Step-by-step explanation:

The medical imaging technique that combines MRI with a contrast medium to locate problems with blood vessels is MRA (Magnetic Resonance Angiography).

MRA uses a contrast agent, typically a paramagnetic metal cation, which alters the magnetic properties of water in cells. This allows physicians to obtain detailed images of soft tissues, including blood vessels.

Unlike CT scans or PET scans, which use X-rays or radiopharmaceuticals respectively, MRA does not expose patients to radiation, making it a safer option.