Table 6. Summary of thoracic deposition fraction in 10 different subjects under oral and sitting breathing conditions using different equations.

Particle diameter (µm)	Cheng equation†	Other equations‡	ICRP equation without lung scaling	ICRP equation with lung scaling§	ICRP equation with different breathing patterns§
0.001	-	0.24±0.02	0.34±0.001	0.32±0.003	0.31±0.011
0.01	-	0.65±0.04	0.65±0.001	0.64±0.057	0.63±0.06
0.1	-	0.30±0.02	0.30±0.0001	0.29±0.056	0.26±.092
1	0.18±0.01	0.17±0.01	0.17±0.001	0.17±0.044	0.15±0.068
5	0.57±0.08	0.56±0.024	0.53±0.025	0.52±0.079	0.48±0.059
10	0.49±0.09	0.40±0.04	0.31±0.015	0.31±0.025	0.27±.022

^†se equation 10 in appendix; ^‡other equations include average deposition fraction obtained from ICRP (6), NCRP (31) and Cheng (10); ^§see equations 2a and 4a in appendix.