Cancer type

Beam angle

Number of beamlets

VOI

Number of voxels

Prostate

90˚

599

STV

4916

270˚

605

Bladder

15,189

Femoral heads

23,908

Rectum

8570

Head-and-neck

75˚

374

CTV

2603

240˚

356

Brain

96,536

300˚

365

Brainstem

2506

Optic chiasm

110

Lung

205˚

1539

PTV

11,161

275˚

1218

Esophagus

1435

345˚

1042

Spinal cord

2030

Total lung

159,188

Heart

18,148