At the University of Chicago medical Center, doctors are recommending alternative diagnostic tests that do not rely on this medical isotope but may not be as good and may cost more.

芝加哥大学医学中心，医生们推荐不以来这种医用同位素的替代诊断方法，但效果可能不佳且耗费更大。

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It is worth noting, moreover, that no company has ever been denied an export license for HEU to be used in medical isotope production under current law which has, moreover, created incentives for countries to begin to convert to LEU .

CENTERFORSECURITYPOLICY: Kyl and Schumer move to monitor uranium exports

If enacted in its current form, Section 621 of this year's Energy bill , by contrast, would allow foreign companies to receive U.S. HEU for use in medical isotope production without having to move toward a low-enriched uranium (LEU) target, even if it is technically feasible for them to do so.

CENTERFORSECURITYPOLICY: Kyl and Schumer move to monitor uranium exports

The isotope, known as a medical tracer, is made outside the United States by a complicated process requiring highly enriched uranium from nuclear reactors.

NEWYORKER: Fussbudget