Comprehensive Assessment of Health Impacts from Exposure to Nonionizing Radiation for Healthcare Practitioners Working with MRI and Ultrasound

Table 2

The levels of occupational hazards at the workplaces of ultrasound diagnostics specialists.

Indicators		Dimension	n	Mean ± m	Min–Max	Standard deviation	TLV	Percentage of exceeding	Mean/TLV
The 2nd group—ultrasound diagnostics specialists
Noise		dBA	18	50.1 ± 2.1	32.0–63.1	8.9	50	61.1	1.0
Ultrasound (kHz)	12.5	dB	18	26.8 ± 2.0	10.1–41.3	8.4	80	0	0.3
	16		18	23.7 ± 1.7	11.3–40.3	7.4	90	0	0.3
	20		18	28.6 ± 2.1	13.5–50.3	8.9	100	0	0.3
	25		18	20.1 ± 1.7	12.1–32.4	7.0	105	0	0.2
	31.5		18	17.4 ± 1.2	12.9–28.1	4.9	110	0	0.1
EMF (50 Hz)		Electric (kV/m)	18	0.5 ± 0.1	0.06–1.1	0.3	0.5	50	1.1
		Magnetic (A/m)	18	0.8 ± 0.1	0.1–2.0	0.6	4	0	0.2
CMF		Strength (kА/m)	18	0.18 ± 0.01	0.05–0.23	0.04	8	0	0.02
		Magnetic induction (mT)	18	0.22 ± 0.01	0.06–0.26	0.04	10	0	0.02
EMF of RF		Electric field (V/m)	18	1.32 ± 0.15	0.05–1.99	0.6	80	0	0.02
		Magnetic field (А/m)	18	0.67 ± 0.08	0.03–1.32	0.35	3	0	0.2
EMF (5–2,000 Hz)		Electric field (V/m)	18	7.30 ± 0.81	2.69–13.01	3.42	25	0	0.3
		Magnetic field (nT)	18	113.4 ± 17.1	0.07–12.3	72.5	250	0	0.5
EMF (2–400 kHz)		Electric field (V/m)	18	0.92 ± 0.12	0.19–1.66	0.51	2.5	0	0.4
		Magnetic field (nT)	18	4.8 ± 1.0	0.50–13.8	4.2	25	0	0.2
Electrostatic field		kV/m	18	0.27 ± 0.04	0.03–0.62	0.19	20	0	0.01