Radiation Oncology

Table 1 Quality scores for each objective

From: Combining deep-inspiration breath hold and intensity-modulated radiotherapy for gastric mucosa-associated lymphoid tissue lymphoma: Dosimetric evaluation using comprehensive plan quality indices

	Target			Organ-at-risk (OAR)
Score	PTV			Rt. kidney	Lt. kidney	Spinal cord	Liver	Heart	Lung		Bowel^a
Score	D₉₅ (cGy)	HI	CI	D_mean (cGy)	D_mean (cGy)	D_max (cGy)	D_mean (cGy)	D_mean (cGy)	D_mean (cGy)	V20 (cm³)	D_max (cGy)
0	< 2550	1.0	–	> 1800	> 1800	> 3000	≥2000	> 1000	≥900	> 2000
1	2550	0.9	< 0.2, > 1.8	1800	1800	3000	1950	1000	950	2000
2	2600	0.8	0.2, 1.8	1700	1700	2900	1900	950	900	1900
3	2650	0.7	0.3, 1.7	1600	1600	2800	1850	900	850	1800
4	2700	0.6	0.4, 1.6	1500	1500	2700	1800	850	800	1700
5	2750	0.5	0.5, 1.5	1400	1400	2600	1750	800	750	1600
6	2800	0.4	0.6, 1.4	1300	1300	2500	1700	750	700	1500	2700
7	2850	0.3	0.7, 1.3	1200	1200	2400	1650	700	650	1400	2750
8	2900	0.2	0.8, 1.2	1100	1100	2300	1600	650	600	1300	2800
9	2950	0.1	0.9, 1.1	1000	1000	2200	1550	600	550	1200	2850–2950
9	2950	0.1	0.9, 1.1	1000	1000	2200	1550	600	550	1200	3050–3150
10	3000	0.0	1.0	950	950	2100	1500	550	500	1100	3000
11				900	900	2000	1450	500	450	1000
12				850	850	1900	1400	450	400	900
13				800	800	1800	1350	400	350	800
14				750	750	1700	1300	350	300	700
15				700	700	1600	1250	300	250	600
16				650	650	1500	1200	250	200	500
17				600	600	1400	1150	200	150	400
18				550	550	1300	1100	150	100	300
19				500	500	1200	1050	100		200
20				400	400	1100	1000	50		100

The sum of scores for each objective is defined as the “raw plan quality metric (PQM)”. The maximum score was set to 178, and the PQM (%) was determined as the percent of the Raw PQM to Max PQM for each plan
^aBowel scoring was conducted differently because part of the bowel is included in the PTV, and therefore, the bowel dose partly reflects the PTV coverage
Abbreviations: PTV planning target volume, HI homogeneity index, CI conformity index

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ISSN: 1748-717X

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