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Abstract #2805

Breath-hold and Free-Breathing Single-Shot Radial Quiescent-Interval Slice-Selective (QISS) MRA for Evaluation of the Pulmonary Arteries

Robert R. Edelman1,2, Shivraman Giri3, Robert Silvers1, Kiran Thakrar1, and Ioannis Koktzoglou4,5

1Radiology, NorthShore University HealthSystem, Evanston, IL, United States, 2Radiology, Northwestern University, Chicago, IL, United States, 3Siemens HealthCare, 4Radiology, NorthShore University HealthSystem, 5Radiology, University of Chicago

For suspected pulmonary embolism, CTA is the first-line imaging test, with CEMRA a potential alternative. Disadvantages including exposure to ionizing radiation and iodine contrast for CTA, while CEMRA is sensitive to respiratory motion and requires a gadolinium-based contrast agent. As a nonenhanced alternative, we tested breath-hold and free-breathing versions of single-shot radial QISS. Compared with the reference standard, all pulmonary artery branches down to the segmental level were visualized by breath-hold and navigator-gated QISS. With further optimization and validation, radial QISS has the potential to provide a nonenhanced alternative to CTA and CEMRA for the evaluation of suspected pulmonary embolism.

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