Volumetric Modulated Arc Radiotherapy for Early Stage Non-Small-Cell Lung Carcinoma: Is It Better Than the Conventional Static Beam Intensity Modulated Radiotherapy?

Table 1

Dose parameters of organs at risk used for data analysis.

Organs at risk	Dose parameters for
Spinal cord	Maximum dose (𝐷max)
Heart	Mean dose (𝐷mean),; Volume received 40 Gy or above (𝑉40)
Whole lung; (exclude PTV)	Mean dose (𝐷mean),; Volume received 20 Gy or above (𝑉20); Volume received 10 Gy or above (𝑉10); Volume received 5 Gy or above (𝑉5)
Ipsilateral lung; (exclude PTV)	Mean dose (𝐷mean); Volume received 20 Gy or above (𝑉20)
Contralateral lung	Mean dose (𝐷mean); Volume received 20 Gy or above (𝑉20)