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Comparison of CLD and MHD in FB, EBH, DIBH
CLD=central lung distance; MHD=maximum heart distance; FB=free breathing; EBH=expiration breath hold; DIBH=deep inspiration breath hold.
*Parallel line distance from the centre of the exposed field to the back surface of the anterior chest of the backward surface; †Back surface of the beam's eye view of plans for the heart to the backward surface of the anterior heart.
