Hyperpolarized 129-Xenon Imaging in Adult Hematopoietic Cell Transplant Recipients With Pulmonary Impairment

The primary objective of the study is to correlate 129-Xenon measures of ventilation, gas exchange, and pulmonary circulation with spirometric and quantitative CT measurements. A secondary objective is to assess the differences in 129-Xe MRI characteristics between patients with and without OS progression at 6 months after enrollment. Other secondary objectives include the assessment of the relationship of VDP, barrier defects (continuous variable), and circulation defects (continuous variable) with pulmonary function, quantitative CT measurements, SGRQ, and SF-6D.