Which lead lengths are included in the MRI expansion?

The inclusion of 60cm octrode leads in the MRI expansion is significant because these lead lengths are optimized for certain medical applications where depth and reach are important. In MRI environments, specific lead lengths can affect the quality of signal and safety during imaging procedures.

The choice of 60cm provides a practical option for many standard clinical scenarios, allowing for sufficient reach while still maintaining compatibility with MRI systems. This balance ensures that healthcare practitioners can utilize these leads effectively, ensuring both patient safety and the reliability of the imaging process.

Other lead lengths may not meet the specific requirements necessary for MRI compatibility or might not be commonly used in the context covered by the expansion, making them less favorable choices for this question. Thus, 60cm stands out as the most suitable and commonly utilized lead length for MRI applications within the provided options.