Figure 1.

Lung. Dose plots (a-l): the 1^st, 2^nd and 3^rd rows correspond to LET $L$, dose $d$ and biological dose $b$ respectively; the 1^st, 2^nd, 3^rd and 4^th columns correspond to QN, ICR, QN-LET and ICR-LET respectively. Dose\LET-volume plots (m-s): LVH (m), DVH (n) and BVH (o) for CTV1cm, DVH (p) for CTV, LVH (q), DVH (r) and BVH (s) for the heart. The display window for $L$ is [0, 5keV/μm], and iso-LET lines of 4.0 and 3.2 are highlighted in (a-d); the display window for $d$ and $b$ is [0%, 110%] of prescription dose, and iso-dose lines of 110% and 80% are highlighted in (e-l).