Table 2 Effective Radiation Temperatures of Different Materials.

From: Passive Millimeter Wave Imaging System Based on Helical Scanning

Objects

T E

T s  = 0 °C

T s  = 20 °C

T s  = 37 °C

T s  = 40 °C

Clear volunteer

305.929

308.130

310.000

310.330

Metal

273.000

293.000

310.000

313.000

Plastics

289.057

300.377

310.000

311.698

Ceramics

291.271

301.395

310.000

311.519