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

With scintillator sheet
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

No scintillator sheet
Collimator Size (mm) Exposure (s) Image Comments
60 3

size_60mm.jpg

Can see green discolouration caused by previous irradiations.
Blocks must have been rotated by 90 when re-assembling

Second run
Replaced plastic blocks from first run with new un-irradiated plastic blocks
With scintillator sheet
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

Green discolouration probably from scintillator sheet.
Rotated by 90 when re-assembling blocks and sheet

No scintillator sheet
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