Radiotherapy/Experimental Runs/2022-09-07: Difference between revisions
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https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Nov2022/setup_1.png | https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Nov2022/setup_1.png | ||
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=== Pre-data Taking Information and Notes === | |||
* Used 200mmx200mmx2mm green or blue scintillator sheet polystyrene base sandwiched by two 200mmx200mmx50mm polystyrene clear plastic blocks | |||
* 53cm from "phi" symbol on camera to sheet | |||
* Checked camera in focus with ruler in front/back and middle of two blocks. | |||
* Pelicase on couch | |||
* Scintillator blocks aligned to laser cross hairs | |||
* 785 mm source to surface distance suitable for output factor/PDD/profile measurements. | |||
* Room lights out and pelicase window closed by 1mm pelicase material. | |||
* Check optical axis aligned with top surface using crosshair in the image analysis. | |||
=== Camera settings === | === Camera settings === | ||
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=== Plan === | === Plan === | ||
* Take photos of | * Take photos of blue sheet with blocks starting from 60mm collimator size to 5mm. | ||
* Remove blue sheet – repeat measurements | * Remove blue sheet – repeat measurements | ||
* | * Use new set of blocks and blue sheet - repeat measurements | ||
== Data taking == | == Data taking == |
Revision as of 17:43, 16 November 2022
Third experimental measurements with Cyberknife at Birmingham. Green and blue scintillator thin sheet measurements with measurements of green radiation damage.
Setup
Schematic
Pre-data Taking Information and Notes
- Used 200mmx200mmx2mm green or blue scintillator sheet polystyrene base sandwiched by two 200mmx200mmx50mm polystyrene clear plastic blocks
- 53cm from "phi" symbol on camera to sheet
- Checked camera in focus with ruler in front/back and middle of two blocks.
- Pelicase on couch
- Scintillator blocks aligned to laser cross hairs
- 785 mm source to surface distance suitable for output factor/PDD/profile measurements.
- Room lights out and pelicase window closed by 1mm pelicase material.
- Check optical axis aligned with top surface using crosshair in the image analysis.
Camera settings
- Focal length 20mm
- lens focus distance – 0.5 (500mm)
- 53cm focal plane (phi on camera ) to sheet
- f-number 5.6
Plan
- Take photos of blue sheet with blocks starting from 60mm collimator size to 5mm.
- Remove blue sheet – repeat measurements
- Use new set of blocks and blue sheet - repeat measurements
Data taking
Blue scintillator sheet | ||||||
---|---|---|---|---|---|---|
Collimator Size (mm) | Exposure (s) | ISO | f-number | File no. | Comments | Image |
60 | 10 | 400 | 5.6 | 69-73 | ||
50 | 10 | 400 | 5.6 | 74-78 | ||
40 | 13 | 400 | 5.6 | 79-83 | ||
35 | 15 | 400 | 5.6 | 84-88 | ||
30 | 15 | 400 | 5.6 | 89-93 | ||
25 | 20 | 400 | 5.6 | 94-98 | ||
20 | 25 | 400 | 5.6 | 99,101-104 | ||
15 | 30 | 400 | 5.6 | 106-110 | ||
12.5 | 30 | 400 | 5.6 | 111-115 | ||
10 | 30 | 400 | 5.6 | 116-120 | ||
7.5 | 30 | 400 | 5.6 | 121-130 | ||
5 | 30 | 400 | 5.6 | 131-140 | ||
60 | 4 | 400 | 5.6 | 161-165 | ||
60 | 5 | 400 | 5.6 | 166-170 | ||
60 | 6 | 400 | 5.6 | 171-175 | ||
5 | 30 | 800 | 5.6 | 141-145 | ||
5 | 30 | 1600 | 5.6 | 146-150 | ||
5 | 30 | 400 | 2.8 | 151-155 | ||
5 | 15 | 1600 | 5.6 | 156-160 |
No scintillator sheet | ||||||
---|---|---|---|---|---|---|
Collimator Size (mm) | Exposure (s) | ISO | f-number | File no. | Comments | Image |
60 | 10 | 400 | 5.6 | 69-73 | ||
50 | 10 | 400 | 5.6 | 74-78 | ||
40 | 13 | 400 | 5.6 | 79-83 | ||
35 | 15 | 400 | 5.6 | 84-88 | ||
30 | 15 | 400 | 5.6 | 89-93 | ||
25 | 20 | 400 | 5.6 | 94-98 | ||
20 | 25 | 400 | 5.6 | 99,101-104 | ||
15 | 30 | 400 | 5.6 | 106-110 | ||
12.5 | 30 | 400 | 5.6 | 111-115 | ||
10 | 30 | 400 | 5.6 | 116-120 | ||
7.5 | 30 | 400 | 5.6 | 121-130 | ||
5 | 30 | 400 | 5.6 | 131-140 | ||
60 | 4 | 400 | 5.6 | 195-199 | ||
60 | 6 | 400 | 5.6 | 200-204 |
Green scintillator sheet | ||||||
---|---|---|---|---|---|---|
Collimator Size (mm) | Exposure (s) | ISO | f-number | File no. | Comments | Image |
60 | 2 | 400 | 5.6 | 281-285 | ||
60 | 3 | 400 | 5.6 | 286-290 | ||
60 | 4 | 400 | 5.6 | 291-295 | ||
60 | 6 | 400 | 5.6 | 296-300 | ||
60 | 10 | 400 | 5.6 | 301-305 | ||
50 | 10 | 400 | 5.6 | 306-310 | ||
50 | 2 | 400 | 5.6 | 311-315 | ||
40 | 13 | 400 | 5.6 | 316-320 | ||
40 | 2 | 400 | 5.6 | 321-325 | ||
35 | 4 | 400 | 5.6 | 326-330 | ||
35 | 15 | 400 | 5.6 | 331-335 | ||
30 | 15 | 400 | 5.6 | 336-340 | ||
30 | 4 | 400 | 5.6 | 341-345 | ||
25 | 20 | 400 | 5.6 | 346-350 | ||
25 | 5 | 400 | 5.6 | 351-355 | ||
20 | 25 | 400 | 5.6 | 356-360 | ||
20 | 6 | 400 | 5.6 | 361-365 | ||
15 | 30 | 400 | 5.6 | 366-370 | ||
12.5 | 30 | 400 | 5.6 | 377-381 | ||
10 | 30 | 400 | 5.6 | 382-386 | ||
7.5 | 30 | 400 | 5.6 | 387-391 | ||
5 | 30 | 400 | 5.6 | 392-396 |
Background | ||||||
---|---|---|---|---|---|---|
Collimator Size (mm) | Exposure (s) | ISO | f-number | File no. | Comments | Image |
None | 4 | 400 | 5.6 | 176 | ||
None | 5 | 400 | 5.6 | 177 | ||
None | 6 | 400 | 5.6 | 178 | ||
None | 8 | 400 | 5.6 | 179 | ||
None | 10 | 400 | 5.6 | 180 | ||
None | 13 | 400 | 5.6 | 181 | ||
None | 15 | 400 | 5.6 | 182 | ||
None | 20 | 400 | 5.6 | 183 | ||
None | 25 | 400 | 5.6 | 184 | ||
None | 30 | 400 | 5.6 | 185 |