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. Author manuscript; available in PMC: 2021 Sep 1.
Published in final edited form as: Pract Radiat Oncol. 2020 May 13;10(5):372–381. doi: 10.1016/j.prro.2020.04.004

Table 3.

Demographics of the sample set. “% of this irradiation type” refers to the % of all IROC phantoms irradiated under these conditions that failed the irradiation.

Demographic Lung Phantoms Spine Phantoms

Treatment Machine Number of Failing Phantoms % of this irradiation type Number of Failing Phantoms % of this irradiation type
Varian 94 12% 32 18%
 Base classa 43 11% 18 27%
 Trilogy 1 6% 4 44%
 TrueBeam 50 13% 10 10%
Elekta 17 15% 4 25%
 Agility 1 13% 0 0%
 Infinity 6 16% 1 13%
 Synergy 5 12% 0 0%
 Versa HD 4 15% 3 38%
 Precise 1 50% 0 0%
Siemens 3 7% 1 50%
 Artiste 2 15% 1 50%
 Oncor 1 17% 0 0%
Accuray 1 4% 5 17%
 Cyberknife 0 0% 4 15%
 Hi-Art Tomotherapy 1 4% 1 25%

Energy (MV)
6 91 10% 31 16%
6 SRS 1 6% 4 44%
6 FFF 14 16% 2 50%
10 4 10% 4 20%
10 FFF 6 24% 1 9%

TPS Algorithm
Eclipse AAA 54 11% 20 17%
Grid-based Boltzmann solversb 19 13% 3 11%
Measuredc 0 0% 3 43%
Monte Carlo 5 5% 2 6%
Superposition Convolution 38 13% 14 21%

Treatment Technique
3D CRT 9 6% 0 0%
Dynamic MLC 23 14% 5 19%
Segmental (Step & Shoot) MLC 16 14% 11 26%
VMAT 67 13% 21 14%
Tomotherapy 1 3% 1 14%
Cyberknife 0 0% 4 15%

Respiration Motion Technique
Gating* 23 18% N/A N/A
ITV* 84 18% N/A N/A
Static 9 2% N/A N/A
Tracking 0 0% N/A N/A
*

p<<0.001, Fisher’s exact test for pairwise comparisons of gating, ITV and static respiratory motion management techniques

a

Clinac 21EX, Clinac 21iX, Clinac 23iX, Clinac iX, Clinac 2300CD[11]

b

Acuros dose calculation algorithm[20, 21]

c

Ray tracing was the only measurement based algorithm used[21]