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. 2017 Apr 27;2(3):503–514. doi: 10.1016/j.adro.2017.04.005

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© 2017 The Authors on behalf of the American Society for Radiation Oncology

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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(A) Decomposition and comparison of 2 plans from the head and neck cohort. Two plans of different difficulty levels, overall plan generalized evaluation metrics (GEM) at the median (green plus) and 95% quantile (red diamond), are detailed by GEM scores of each threshold-priority constraint (missing data indicate structure not contoured in that plan). Box-and-whisker plots have their whiskers located at the 5% and 95% quantiles of the GEM scores. Their corresponding metric values are tabled in the right columns of metric quantiles. (B) Decomposition and comparison of 2 plans from the prostate cohort, with as low as reasonably achievable (ALARA) constraints involved. ALARA thresholds (constraint values) are set to be the medians of their corresponding metric values, with an assigned priority of 4 and highlighted in blue. For the Rectum:V75Gy[%] constraint, which has a median of 0 Gy, a small number of 0.1 is used as the threshold. (C) Decomposition and comparison of 2 plans from 5-fraction liver stereotactic body radiation therapy cohort, with ALARA constraints involved. ALARA thresholds (constraint values) are set to be the medians of their corresponding metric values, with an assigned priority of 4 and highlighted in blue.

(A) Decomposition and comparison of 2 plans from the head and neck cohort. Two plans of different difficulty levels, overall plan generalized evaluation metrics (GEM) at the median (green plus) and 95% quantile (red diamond), are detailed by GEM scores of each threshold-priority constraint (missing data indicate structure not contoured in that plan). Box-and-whisker plots have their whiskers located at the 5% and 95% quantiles of the GEM scores. Their corresponding metric values are tabled in the right columns of metric quantiles. (B) Decomposition and comparison of 2 plans from the prostate cohort, with as low as reasonably achievable (ALARA) constraints involved. ALARA thresholds (constraint values) are set to be the medians of their corresponding metric values, with an assigned priority of 4 and highlighted in blue. For the Rectum:V75Gy[%] constraint, which has a median of 0 Gy, a small number of 0.1 is used as the threshold. (C) Decomposition and comparison of 2 plans from 5-fraction liver stereotactic body radiation therapy cohort, with ALARA constraints involved. ALARA thresholds (constraint values) are set to be the medians of their corresponding metric values, with an assigned priority of 4 and highlighted in blue.