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Implementation of 10X FFF

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Q1 w
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For those of you with 10X FFF, have you commissioned it?

  • Answered: 61
  • Skipped: 0
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YesNo
Answer Choices –
Responses –
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Yes
85.25%
52
–
No
14.75%
9
TOTAL61
Q2 w
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If yes, do you find it is sometimes superior to 6X FFF?

  • Answered: 53
  • Skipped: 8
Created with Highcharts 10.3.30%10%20%30%40%50%60%70%80%90%100%10…
YesNo
Other (please
specify)
Answer Choices –
Responses –
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Yes
56.60%
30
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No
15.09%
8
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Responses
Other (please specify)
28.30%
15
TOTAL53
Q3 w

If yes, what treatment sites are better treated with 10X FFF?

  • Answered: 28
  • Skipped: 33
Lung and Pelvis
12/5/2019 12:54 AM
in some arcs of SBRT in Chest and Abdomen
5/9/2017 05:09 PM
SBRT Liver, Spine
5/9/2017 03:45 PM
chest, abdomen
5/1/2017 04:31 PM
prostate and gyn pelvis, sbrt livers
5/1/2017 03:49 PM
Deep sites with lower integral dose, and ver high Rx, like single fraction bone mets, when patient is in extreme pain and rapid tx is prioritized. Used very rarely
5/1/2017 02:10 AM
For dose distributions - helps with liver SABR (sometimes get dose 'holes' with 6FFF VMAT). For treatment delivery, 2400MU/min on Varian TB shortens tx time considerably (3-5 min for Liver and Spine SABR)
4/28/2017 06:36 PM
lung and body sbrt
4/28/2017 03:39 PM
Liver SBRT, allows for much shorter treatment time. For high dose per fraction, we can gate to control for motion and still have reasonable treatment times.
4/28/2017 02:43 PM
Abdomen & Pelvis
4/28/2017 01:25 PM
Q4 w

Please add any comment regarding the implementation of 10X FFF.

  • Answered: 26
  • Skipped: 35
It has had limited functionality. We were considering moving to 10X FFF for Step-n-Shoot IMRT but now that VMAT is almost exclusively used for dynamic therapy, the time of treatment delivery is limited by MLC and Gantry Speed, not dose rate.
5/9/2017 05:09 PM
The high dose rate makes for a shorter Tx time
5/9/2017 03:45 PM
Use flattened 10x for prostate IMRT on large patients.
5/4/2017 02:02 PM
not yet commissioned
5/2/2017 01:10 PM
Currently not a priority.
5/1/2017 01:54 PM
Per Varian: 10 FFF = 8.1 MV, 6 FFF = 4.3 MV
5/1/2017 12:58 PM
We are only using 10FFF for SBRT. We'd like to use it for other things but will wait until it is more standard.
4/28/2017 11:52 PM
Actively investigating other benefits (e.g. neutron dose, peripheral photon dose reduction)
4/28/2017 06:36 PM
we only use for sbrt, not conventional fractionation
4/28/2017 03:39 PM
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61 responses