. Author manuscript; available in PMC: 2021 Jan 10.

Published in final edited form as: Med Phys. 2020 Oct 30;47(12):6294–6309. doi: 10.1002/mp.14523

Table 2.

The concentration and size of real phantom inserts used in CT scans

Inserts	Concentration
Hydroxyapatite	200 mgHA/cc (25 mm in DIA) ^† 400 mgHA/cc (25 mm in DIA) ^†
Iodine	2 mgI/cc (30 mm DIA) ^†† 5 mgI/cc (2, 5, 10, 30 mm DIA) ^† 10 mgI/cc (30 mm DIA) ^†† 15 mgI/cc (30 mm DIA) ^†† 3 mgI/cc (7.5 mm DIA) ^* 6 mgI/cc (7.5 mm DIA) ^* 12 mgI/cc (7.5 mm DIA) ^* 18 mgI/cc (7.5 mm DIA) ^* 24 mgI/cc (7.5 mm DIA) ^*
Iodine + blood	2 mgI/cc (30 mm DIA) ^† 4 mgI/cc (30 mm DIA) ^†
Fat	956 mgFat/cc (30 mm DIA) ^†

DIA – diameter

^†

these inserts were not included in training dataset

^††

these iodine inserts were used to generate a part of training dataset

the in-house-made iodine insert that were used as a part of testing dataset

Except for the in-house iodine inserts, the other phantom inserts are standard CT phantom inserts fabricated by the vendor (Sun Nuclear, Inc.); the concentration of the other materials (e.g., the blood mimicking material in the blood-iodine mixture) are available in the technical specifications from the vendor.