Frans Jozef Thomas Wackers (born 1939) is a Dutch American clinical cardiologist and research scientist known for his contributions to nuclear cardiology.

Wackers was the director of the Cardiovascular Nuclear Imaging and Stress Laboratories at Yale School of Medicine for 22 years.

[1] While a medical school student, Wackers began research in 1963 as a student-research-assistant in the UvA Anatomical Pathology Laboratory under the mentorship of Professor Jan Hampe.

[4] From 1972 to 1974, Wackers pursued his Internal Medicine Residency at the Wilhelmina Gasthuis University Hospital in Amsterdam and subsequently continued with a Cardiology Fellowship at the same institution from 1974 to 1977.

[6] Wackers was a pioneer in exploring and advancing new clinical cardiac imaging applications with radiotracers, particularly thallium-201, for detecting coronary artery disease.

In 1993, along with a core group of clinical investigators, he founded the American Society of Nuclear Cardiology (ASNC).