PMID- 9949399
OWN - NLM
STAT- MEDLINE
DCOM- 19990428
LR  - 20170214
IS  - 0094-2405 (Print)
IS  - 0094-2405 (Linking)
VI  - 26
IP  - 1
DP  - 1999 Jan
TI  - Physical characteristics of a miniature multileaf collimator.
PG  - 65-70
AB  - A preliminary study of the physical characteristics of a miniature multileaf 
      collimator (mMLC) used with 4 MV x rays is reported. The mMLC attached to the 
      accessory mount of a class C or D Varian linear accelerator (Varian Oncology 
      Systems, Palo Alto, CA) with a source to aperture distance of 65 cm. The field 
      penumbra using the small leaves was found to be consistent with the anticipated 
      field penumbra using photon jaws at the same source to aperture distance as the 
      mMLC. The percentage depth dose values of square fields were found to be 
      consistent with the fields collimated with the upper and lower jaws. Output 
      factors for the very small fields were found to vary rapidly. Circular fields 
      could be produced with depth dose characteristics similar to those produced using 
      conical tertiary collimators, commonly used for radiosurgery, but with a broader 
      penumbra.
FAU - Xia, P
AU  - Xia P
AD  - School of Medicine, University of California at San Francisco, California 94143, 
      USA.
FAU - Geis, P
AU  - Geis P
FAU - Xing, L
AU  - Xing L
FAU - Ma, C
AU  - Ma C
FAU - Findley, D
AU  - Findley D
FAU - Forster, K
AU  - Forster K
FAU - Boyer, A
AU  - Boyer A
LA  - eng
GR  - CA43840/CA/NCI NIH HHS/United States
PT  - Journal Article
PT  - Research Support, U.S. Gov't, P.H.S.
PL  - United States
TA  - Med Phys
JT  - Medical physics
JID - 0425746
SB  - IM
MH  - Dose-Response Relationship, Radiation
MH  - Energy Transfer
MH  - Humans
MH  - Particle Accelerators/*instrumentation
MH  - Radiosurgery
MH  - Radiotherapy Dosage
MH  - Radiotherapy, Computer-Assisted/*methods
MH  - Sensitivity and Specificity
EDAT- 1999/02/09 00:00
MHDA- 1999/02/09 00:01
CRDT- 1999/02/09 00:00
PHST- 1999/02/09 00:00 [pubmed]
PHST- 1999/02/09 00:01 [medline]
PHST- 1999/02/09 00:00 [entrez]
AID - 10.1118/1.598478 [doi]
PST - ppublish
SO  - Med Phys. 1999 Jan;26(1):65-70. doi: 10.1118/1.598478.