ABSTRACT Objective To evaluate perioperative changes in olfactory bulb volume (OBV) and olfactory function in patients with eosinophilic chronic rhinosinusitis (ECRS) using 3T magnetic resonance imaging (MRI) with fast imaging employing steady‐state acquisition (FIESTA) sequence and to assess their associations. Methods This single‐center, retrospective observational study included 32 patients with ECRS who underwent functional endoscopic sinus surgery. Olfactory function was assessed pre‐ and postoperatively using the Alinamin test, T OSIT‐J: r = 0.402, p = 0.022), which should be interpreted as exploratory. Multivariate analysis revealed that longer odor duration on the Alinamin test (≥ 50 s) and higher SAOQ scores predicted smaller OBV increases. Conclusion OBV measurement using 3T MRI with FIESTA may provide a structural correlate of olfactory changes in ECRS. The observed correlation between OBV changes and olfactory identification suggests a potential relationship with postoperative functional recovery. Level of Evidence 4.
Yamamoto et al. (Sat,) studied this question.
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