Final answer:
The size of metal artifacts in T-2 weighted MRI imaging is influenced by the magnetic properties of the metal. Paramagnetic and ferromagnetic metals create larger artifacts, with gadolinium being a common example when used as a stable complex due to its seven unpaired electrons.
Step-by-step explanation:
The question seems to seek information on the influence of different metals on MRI imaging, particularly on T-2 weighted imaging. In an MRI, the magnetic properties of protons in hydrogen atoms are used to create images of the body. Certain metals greatly affect MRI images due to their magnetic properties; metals that are paramagnetic or ferromagnetic create larger artifacts on T-2 weighted imaging. A classic example of a paramagnetic metal used in MRI is Gadolinium (Gd³+), due to its seven unpaired electrons, although it's toxic and must be used as a stable complex like Gd-DTPA. Thus, the combination of metals that will produce a larger artifact would be those that possess higher paramagnetic properties or those that are ferromagnetic.
It is important to note that any contrast agent to be used in MRI must be in a stable complex form to avoid toxicity and ensure that it can be excreted from the body efficiently. The use of such agents allows for greater contrast in MRI images, thereby providing more detail about the structure and function of organs and soft tissues.