Table 4.

CT numbers calibrated and mapped to 80 keV from all vendor‐protocols

Scanner	Foam 1	Foam 2	Foam 3	Air	Water	Lung	kVp (kV)	Dose (mGy)
1	−939.26	−822.01	−697.80	−1000.00	0.00	−854.62	100	1.5
	−939.12	−821.85	−697.93	−1000.00	0.00	−855.07	120	1.5
	−938.80	−821.99	−697.91	−1000.00	0.00	−854.13	100	3.0
	−938.51	−822.13	−697.89	−1000.00	0.00	−854.70	120	3.0
	−938.49	−822.08	−697.92	−1000.00	0.00	−853.91	100	6.0
	−938.60	−821.90	−698.01	−1000.00	0.00	−854.51	120	6.0
2	−940.44	−820.96	−698.19	−1000.00	0.00	−858.33	120	3.0
3	−940.34	−823.32	−696.82	−1000.00	0.00	−855.05	100	1.5
	−940.68	−822.69	−697.12	−1000.00	0.00	−855.76	120	1.5
	−940.68	−822.27	−697.37	−1000.00	0.00	−856.16	140	1.5
	−939.19	−822.91	−697.29	−1000.00	0.00	−854.51	100	3.0
	−938.78	−822.44	−697.65	−1000.00	0.00	−855.10	120	3.0
	−939.18	−822.29	−697.66	−1000.00	0.00	−855.36	140	3.0
	−938.21	−822.61	−697.67	−1000.00	0.00	−854.15	100	6.0
	−938.35	−822.17	−697.90	−1000.00	0.00	−854.92	120	6.0
	−938.39	−821.98	−698.00	−1000.00	0.00	−855.14	140	6.0
4	−938.28	−823.61	−697.06	−1000.00	0.00	−856.11	100	3.0
	−938.11	−822.72	−697.62	−1000.00	0.00	−856.01	120	3.0
	−938.40	−822.39	−697.76	−1000.00	0.00	−856.06	135	3.0
	−938.27	−823.42	−697.18	−1000.00	0.00	−855.85	100	6.0
	−938.32	−822.59	−697.65	−1000.00	0.00	−855.83	120	6.0
	−938.30	−822.23	−697.87	−1000.00	0.00	−855.80	135	6.0

CT numbers_80keV = (H _{80 kev} − 1) × 1000.

CT number (HU) mapped to 80 keV for each scanner‐protocol.