In Khot et al.’s interesting recent paper in the British Journal of Radiology,1 they describe breath-hold durations of 36 s with maximum inspirations of air as “prolonged breath-holding”. Breath-holding is indeed increasingly applied to mitigate the effects of respiratory motion, both in radiology to improve the imaging and in radiotherapy to decrease the margins. In breast cancer radiotherapy,2 it is also used to expand the lung volume to avoid irradiation of the heart. Here, the breath-holds with air are described as multiple (5–10), “short” breath-holds (20–30 s) and are sometimes called deep inspiratory breath-holds.
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