Ultra-low Dose PET/MRI Imaging in a Pregnant Patient With Metastatic Lung Cancer

Imaging pregnant women diagnosed with cancer constitutes a challenge, particularly with modalities using ionizing radiation. While positron emission tomography/computed tomography (PET/CT) is routinely used for staging of malignancy, its use during pregnancy and the potential risk for the fetus requires careful evaluation. PET/MRI, together with reduced administered radiotracer activity, has been explored as an alternative to conventional PET/CT examination with the goal of lowering radiation exposure to the fetus while maintaining good diagnostic performance. This report highlights the case of a 38-year-old pregnant woman diagnosed with metastatic lung adenocarcinoma. PET/MRI with ultra-low dose administered radiotracer activity is a valuable imaging approach, maintaining the need for accurate diagnostic evaluation while markedly reducing radiation exposure.