Display Settings:

Items per page
We are sorry, but NCBI web applications do not support your browser and may not function properly. More information

Results: 9

1.
Figure 8

Figure 8. From: Modelling the throughput capacity of a single-accelerator multitreatment room proton therapy centre.

Schematic of a two-accelerator system, with each accelerator serving an independent multiroom system.

A H Aitkenhead, et al. Br J Radiol. 2012 December;85(1020):e1263-e1272.
2.
Figure 1

Figure 1. From: Modelling the throughput capacity of a single-accelerator multitreatment room proton therapy centre.

Schematic of a typical proton therapy centre, where multiple rooms are served by a single proton source.

A H Aitkenhead, et al. Br J Radiol. 2012 December;85(1020):e1263-e1272.
3.
Figure 5

Figure 5. From: Modelling the throughput capacity of a single-accelerator multitreatment room proton therapy centre.

Cumulative histogram of the modelled waiting times per beam for each indication. The mean waiting time for the beam was 40 s. CNS, craniospinal; CNS_anaes, craniospinal with anaesthesia; GI, gastrointestinal; GU, genitourinary; THOR, thoracic.

A H Aitkenhead, et al. Br J Radiol. 2012 December;85(1020):e1263-e1272.
4.
Figure 4

Figure 4. From: Modelling the throughput capacity of a single-accelerator multitreatment room proton therapy centre.

The total fraction time by the number of fields per session. The error bars indicate the standard deviations for the total treatment time. The lines connecting the data points are shown for visual emphasis only.

A H Aitkenhead, et al. Br J Radiol. 2012 December;85(1020):e1263-e1272.
5.
Figure 3

Figure 3. From: Modelling the throughput capacity of a single-accelerator multitreatment room proton therapy centre.

Example of the use of an offset Rayleigh distribution to generate random variation in the duration of a process step. For this illustration, a Rayleigh distribution having a Rayleigh sigma (σr) of 3 min has been offset by 6.25 min, yielding a distribution with a typical (mode) value equal to 9.25 min. The mean and standard deviation of this distribution are 10 min and 2 min, respectively, whereas the minimum value is 6.25 min.

A H Aitkenhead, et al. Br J Radiol. 2012 December;85(1020):e1263-e1272.
6.
Figure 2

Figure 2. From: Modelling the throughput capacity of a single-accelerator multitreatment room proton therapy centre.

The process flow followed by the model within each treatment room. The durations of Stages 2, 3, 6, 7, 9 and 10 are defined by the inputs to the model. The duration of Stage 5 is dependent on the beam queue, and therefore on the status of all other rooms in the system. N, no; Y, yes.

A H Aitkenhead, et al. Br J Radiol. 2012 December;85(1020):e1263-e1272.
7.
Figure 9

Figure 9. From: Modelling the throughput capacity of a single-accelerator multitreatment room proton therapy centre.

Model predictions of (a) the throughput capacity, (b) the mean waiting time per beam and (c) the saturation level for the MD Anderson Cancer Center system as the number of rooms in the system is varied. (d) The mean waiting time per beam against the saturation level of the system. In each plot the two curves correspond to the single-accelerator and double-accelerator scenarios. The lines connecting the data points are shown for clarity only.

A H Aitkenhead, et al. Br J Radiol. 2012 December;85(1020):e1263-e1272.
8.
Figure 7

Figure 7. From: Modelling the throughput capacity of a single-accelerator multitreatment room proton therapy centre.

Model predictions of (a) the throughput capacity, (b) the mean waiting time per beam and (c) the saturation level for the MD Anderson Cancer Center system as the number of rooms in the system is varied. (d) The mean waiting time per beam against the saturation level of the system. In each plot the three curves correspond to reductions in the patient set-up time of 0%, 50% and 75% relative to the standard set-up times. The lines connecting the data points are shown for clarity only.

A H Aitkenhead, et al. Br J Radiol. 2012 December;85(1020):e1263-e1272.
9.
Figure 6

Figure 6. From: Modelling the throughput capacity of a single-accelerator multitreatment room proton therapy centre.

Model predictions of (a) the throughput capacity, (b) the mean waiting time per beam and (c) the saturation level for the MD Anderson Cancer Center system as the number of rooms in the system is varied. (d) The mean waiting time per beam against the saturation level of the system. In each plot the four curves correspond to beam switch times of 27 s, 54 s, 81 s and 108 s. The lines connecting the data points are shown for clarity only.

A H Aitkenhead, et al. Br J Radiol. 2012 December;85(1020):e1263-e1272.

Display Settings:

Items per page

Supplemental Content

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...
Write to the Help Desk