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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: J Allergy Clin Immunol. 2011 Sep 1;128(3):467–478. doi: 10.1016/j.jaci.2011.04.051

Figure 4. MR of lungs in health and asthma.

Figure 4

Examples of conventional proton MR images paired with corresponding slices from HP He MR images in a healthy normal subject without ventilation defects (a and b) and a healthy normal subject with ventilation defects (c and d, arrows). HP He MR images in a patient with mild-moderate persistent asthma (e) and severe asthma (f). Note the greater central extent of the defects more typical of severe asthma (f, arrowheads).