Table 1.

The criteria for radiation-induced acute dermatitis of rat dorsal skin

Score	Observation
0.0	No change
0.5	Faint erythema
1.0	Bright erythema
1.5	<50% dry desquamation
2.0	>50% dry desquamation, mild edema
2.5	<50% moist desquamation, moderate edema
3.0	>50% moist desquamation, moderate edema
3.5	Erosion, strong edema
4.0	Ulceration

Skin reactions were evaluated macroscopically from Grade 0 to 4 in nine steps, according to clinical criteria of cancer radiotherapy. The observation period was 4 weeks after irradiation.