TY  - RPRT
TI  - Intensity-modulated radiation therapy using a variable-aperture collimator.
AU  - S Webb
AU  - G Hartmann
AU  - G Echner
AU  - W Schlegel
PY  - 2003
DO  - 10.1088/0031-9155/48/9/310
UR  - https://pubmed.ncbi.nlm.nih.gov/12765333/
ID  - 12765333
ER  -