Table 1.

Information of HN‐SABR patients.

Patient	Site	Prescription (Gy)	Fraction	Target volume (cm3)	Total MUs a	Total Delivery Time a (min)	Group b
1	Right RP Node	45	5	7.37	1575	2.92	1
2	Right RP Node	45	5	9.95	1984	3.22	1
3	Right BOT	45	5	8.26	1566	2.67	2
4	Right OPX	45	5	15.27	2221	3.88	2
5	OPX	40	5	36.93	2819	4.74	1
6	Left RMT CA	40	5	59.82	2486	4.27	2
7	Right RP Node	45	5	8.98	2359	3.97	1
8	OPX	47.5	5	21.05	4259	7.13	1
9	Right BOT	45	5	17.19	2232	3.80	2
10	Skull Base	45	5	36.43	3388	6.79	1
11	Left NPX	45	5	21.56	4110	6.94	1
12	Right Neck	45	5	12.75	1875	3.17	2
13	Right Neck	45	5	24.59	2031	3.70	2
14	Post Pharynx	45	5	9.95	3000	5.15	1
15	Left RP Node	45	5	16.31	2018	3.37	1
16	Clivus	45	5	26.05	4505	7.52	1
17	Rt Neck	45	5	24.87	1885	3.16	2
18	C1‐C2	45	5	30.54	4365	7.05	2
19	Ethmoid Sinus	45	5	25.7	1649	2.72	1
20	Rt OPX	45	5	9.45	2285	3.87	2
21	BOT	45	5	29.18	1831	3.12	2

^aTotal MUs and total delivery time are per fraction.

^bGroup 1: skull base patients; Group 2:patients with targets inferior to C1 bone.

$\text{RP}=\text{retropharyngeal}$; $\text{BOT}=\text{base of tongue}$; $\text{OPX}=\text{oropharynx}$; $\text{RMT CA}=\text{retromolar trigone carcinoma}$.