The purpose of this project was to provide national guidance on the optimal use of ^99mTc during a situation of reduced supply. To accomplish this, our objective at CADTH was:

• to develop, taking a national perspective, a priority ranking of the most common clinical uses of ^99mTc for use by decision-makers at various levels of the health system (i.e., institution, health authority, or jurisdiction) during a period of reduced supply of the isotope.

Early in the project, CADTH and MIIMAC acknowledged that a priority ranking constructed taking a national perspective will not accurately reflect the local contexts of all jurisdictions in which it is meant to be used. Given this, our second objective was:

• to design a customizable, web-based prioritization tool that allows decision-makers the opportunity to create personalized priority lists specific to their institution, health authority, or jurisdiction for use during a period of reduced supply of the isotope.