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Table 1 Dose coverage to PTV and OAR doses

From: A large helmet-shaped proliferating trichilemmal tumor of the scalp: Is definitive radiotherapy the treatment? A case report

Target

Coverage

Achieved

PTV

95% PTV to receive 47.5 Gy

92% PTV received 47.5 Gy

GTV

100% PTV to receive 47.5 Gy

96% GTV received 47.5 Gy

OARs

Constraints

Achieved

Right eye

Dmean < 35 Gy

12.1 Gy

Left eye

Dmean < 35 Gy

11 Gy

Right cochlea

Dmax < 45 Gy

24.3 Gy

Left cochlea

Dmax < 45 Gy

10.27 Gy

Right optic nerve

Dmax < 54 Gy

9.7 Gy

Left optic nerve

Dmax < 54 Gy

9.97 Gy

Optic chiasma

Dmax < 54 Gy

9 Gy

Right temporal lobe

Dmax < 55 Gy

51.8 Gy

Left temporal lobe

Dmax < 55 Gy

49.7 Gy

Brain

As low as reasonably achievable

Dmax 50 Gy

Brainstem

Dmax < 54 Gy

12 Gy

Spinal cord

Dmax < 45 Gy

26.4 Gy

Right parotid

Dmean < 26 Gy

27 Gy

Left parotid

Dmean < 26 Gy

34 Gy