Martin. The addition of VIBE provides a gray scale that allows readers to distinguish between the clot, or thrombus, and the lung, which both show up dark on MRPA. Also, VIBE is not time delicate, Dr. Martin stated. If the patient coughs, that can be done it again. You do not have that choice with MRPA. The true FISP test does not require contrast agent or a breath hold, a significant consideration for embolism patients who often cannot hold their breath very long enough for picture acquisition on MRPA.Inusa, M.D., Paul T. Telfer, M.D., Melanie Kirby-Allen, M.D., Timothy L. McCavit, M.D., Annie Kamdem, M.D., Gladstone Airewele, M.D., Gerald M. Woods, M.D., Brian Berman, M.D., Julie A. Panepinto, M.D., M.S.P.H., Beng R. Fuh, M.D., Janet L. Kwiatkowski, M.D., Allison A. King, M.D., M.P.H., Jason M. Fixler, M.D., Melissa M. Rhodes, M.D., Alexis A. Thompson, M.D., M.P.H., Mark E. Heiny, M.D., Ph.D., Rupa C. Redding-Lallinger, M.D., Fenella J. Kirkham, M.D., Natalia Dixon, M.D., Corina E. Gonzalez, M.D., Karen A. Kalinyak, M.D., Charles T. Quinn, M.D., John J. Strouse, M.D., Ph.D., J. Philip Miller, A.B., Harold Lehmann, M.D., Ph.D., Michael A.