Table 1.

Minimum, maximum, and range Hounsfield units of the NRFP fetal specimen over the 22-week staining period (excluding airspace and peripheral hyperenhanced regions)

Time point	Minimum HU	Maximum HU	HU range
Week 0	−163.02	803.90	966.92
Week 2	−185.53	808.52	994.05
Week 4	−180.77	818.32	999.09
Week 6	−182.03	824.36	1006.39
Week 8	6.39	1223.60	1217.21
Week 10	43.02	1362.39	1319.37
Week 12	154.43	1509.32	1354.89
Week 14	185.89	1569.36	1383.47
Week 16	185.96	1609.16	1423.2
Week 18	205.77	1736.35	1530.58
Week 20	205.30	1742.17	1536.87
Week 22	225.34	1756.78	1531.44