Radiotherapy/Experimental Runs/2022-07-26

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Second experimental measurements with Cyberknife at Birmingham. Green scintillator thin sheet measurements only.

Schematic

setup.png

Data Taking

All images taken with Nikon D7000, 20mm lens, f/2.8, 400ISO

First run

Collimator Size (mm) Exposure (s) Image Comments
5 30

size_5mm.jpg

7.5 20

size_7-5mm.jpg

10 15

size_10mm.jpg

12.5 10

size_12-5mm.jpg

15 8

size_15mm.jpg

20 8

size_20mm.jpg

25 6

size_25mm.jpg

30 6

size_30mm.jpg

35 5

size_35mm.jpg

40 4

size_40mm.jpg

50 3

size_50mm.jpg

60 3

size_60mm.jpg

Collimator Size (mm) Exposure (s) Image Comments
5 30

size_60mm.jpg


Second run
Collimator Size (mm) Exposure (s) Image Comments
5 30

size_5mm.jpg

7.5 20

size_7-5mm.jpg

10 15

size_10mm.jpg

12.5 10

size_12-5mm.jpg

15 8

size_15mm.jpg

20 8

size_20mm.jpg

25 6

size_25mm.jpg

30 6

size_30mm.jpg

35 5

size_35mm.jpg

40 4

size_40mm.jpg

50 3

size_50mm.jpg

60 3

size_60mm.jpg

Collimator Size (mm) Exposure (s) Image Comments
5 30

size_5mm.jpg

7.5 20

size_7-5mm.jpg

10 15

size_10mm.jpg

12.5 10

size_12-5mm.jpg

15 8

size_15mm.jpg

20 8

size_20mm.jpg

25 6

size_25mm.jpg

30 6

size_30mm.jpg

35 5

size_35mm.jpg

40 4

size_40mm.jpg

50 3

size_50mm.jpg

60 3

size_60mm.jpg



End of range telescope tests.

Experiment Plan

Rev. B Prototype

  • Background & calibration shoot-throughs (background at all 8 DDC232 full-scale ranges – likely 12.5 pC is most appropriate FSR)
  • Pencil beams, 70-130 MeV, 10 MeV steps, in both directions into stack. For direction with Bragg peak in clear sheets, test 2 currents (high/low)

Rev. C Prototype

  • Background & calibration shoot-throughs (12.5 pC FSR)
  • Pencil beams, 70-110 MeV, 5 MeV steps, at clinical current.

Experiment Notes

Range calorimeter measurements with CMOS sensor + photodiodes.

Images from Sensor: /unix/www/html/pbt/wikiData/images/UCLH_Jun2022/CMOS

Photodiode hexadecimal data: /unix/pbt/data/uclh/20220616/DDC232

Run number Beam Energy (MeV) Estimated Range (mm) Current (nA) Spot size (mm, FWHM) DDC232 FSR (pC) DDC232 Integration Time (us) Degrader WET (mm) Comments Photodiode QB Fit CMOS QB Fit PDL Comparison Replay Fit
0 Background N/A N/A N/A 350 170 0 room light off N/A N/A N/A N/A
1 Background N/A N/A N/A 300 170 0 room light off N/A N/A N/A N/A
2 Background N/A N/A N/A 250 170 0 room light off N/A N/A N/A N/A
3 Background N/A N/A N/A 200 170 0 room light off N/A N/A N/A N/A
4 Background N/A N/A N/A 150 170 0 room light off N/A N/A N/A N/A
5 Background N/A N/A N/A 100 170 0 room light off N/A N/A N/A N/A
6 Background N/A N/A N/A 50 170 0 room light off N/A N/A N/A N/A
7 Background N/A N/A N/A 12.5 170 0 room light off (continued) N/A N/A N/A N/A
8 240 N/A 10 N/A 350 170 50 LH shoot through; 270° gantry; CMOS sensor saturated N/A N/A N/A N/A
9 240 N/A 10 N/A 12.5 170 50 LH shoot through; 270° gantry; CMOS sensor saturated N/A N/A N/A N/A
10 240 N/A 10 N/A 12.5 170 50 RH shoot through; 90° gantry; CMOS sensor saturated N/A N/A N/A N/A
11 200 N/A 90 N/A 12.5 170 50 RH shoot through; 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
12 200 N/A 20 N/A 12.5 170 50 RH shoot through; 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
13 130 N/A 50 N/A 12.5 170 0 90° gantry; CMOS sensor slight saturation; N/A N/A N/A N/A
14 120 N/A 60 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
15 120 N/A 270 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
16 110 N/A 70 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
17 110 N/A 300 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
18 100 N/A 90 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
19 100 N/A 350 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
20 90 N/A 110 N/A 12.5 170 0 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
21 90 N/A 400 N/A 12.5 170 0 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
22 80 N/A 500 N/A 12.5 170 0 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
23 70 N/A 700 N/A 12.5 170 0 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
24 130 N/A 200 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
25 200 N/A 20 N/A 12.5 170 50 LH shoot through; 270° gantry; CMOS sensor fine; N/A N/A N/A N/A
26 130 N/A 200 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
27 120 N/A 270 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
28 110 N/A 300 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
29 100 N/A 350 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
30 90 N/A 400 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
31 80 N/A 500 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
32 70 N/A 700 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
33 background N/A N/A N/A 12.5 170 0 RevC onwards; 270° gantry N/A N/A N/A N/A
34 240 N/A 13 N/A 12.5 170 50 LH shoot through; 270° gantry N/A N/A N/A N/A
35 240 N/A 13 N/A 12.5 170 50 RH shoot through; 90° gantry N/A N/A N/A N/A
36 110 N/A 300 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
37 105 N/A 350 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
38 100 N/A 350 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
39 95 N/A 400 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
40 90 N/A 400 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
41 85 N/A 500 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
42 80 N/A 500 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
43 75 N/A 700 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
44 70 N/A 700 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A