Table 2.

Forecasting dose based on distance and time after injection in exponential regression equation. The relationship between distance at 30, 60, 100, and 200 cm at 0 h (injection time), 1.5 h (waiting time), and 3 h (scanning/discharge time) at left lateral, right lateral, anterior, and posterior orientations.

Patient Position	Distance (cm)			Time (h)
		0		1.5		3
		(Exponential Regression) Dose * (μSv/h)	Fold Change from 0 h at 30 cm	(Exponential Regression) Dose * (μSv/h)	Fold Change from 1.5 h at 30 cm	(Exponential Regression) Dose * (μSv/h)	Fold Change from 3 h at 30 cm
Left lateral	30	12.27		7.37		4.23
	60	9.41	−0.23	5.66	−0.23	3.30	−0.22
	100	6.61	−0.46	3.97	−0.46	2.36	−0.44
	200	2.73	−0.78	1.64	−0.78	1.03	−0.76
Right lateral	30	12.14		6.97		4.08
	60	9.23	−0.24	5.36	−0.23	3.15	−0.23
	100	6.40	−0.47	3.78	−0.46	2.23	−0.45
	200	2.57	−0.79	1.58	−0.77	0.94	−0.77
Anterior	30	18.67		11.17		6.25
	60	13.77	−0.26	8.24	−0.26	4.71	−0.25
	100	9.17	−0.51	5.49	−0.51	3.23	−0.48
	200	3.32	−0.82	1.99	−0.82	1.25	−0.80
Posterior	30	19.80		11.87		6.75
	60	14.51	−0.27	8.75	−0.26	5.06	−0.25
	100	9.59	−0.52	5.83	−0.51	3.44	−0.49
	200	3.41	−0.83	2.11	−0.82	1.31	−0.81

* The (exponential regression) dose was calculated using the exponential regression equations from Figure 5 shown in $y=a\times b^x$, where y is the mean dose rate (μSv/h) and x is the distance from the patient (cm).