Figure.

Analysis of odour perception in the patient during radiotherapy sessions

The upper graph indicates periods when the patient perceived the foul odour; the different coloured lines represent results for days in which odour perception was measured. The lower images indicate the beam positions that overlapped the sagittal views of treatment-planning CT: yellow lines indicate the start (cranial; left panel) and end (caudal; right panel) of the full session; red lines indicate the beam positions during the start and end of olfaction for each period of perception. Part of this figure was reproduced, with permission, from Hara et al (2021).²