Radiotherapy/Experimental Runs/2022-09-07: Difference between revisions
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== Data taking == | == Data taking == | ||
=== Plan === | === Plan === | ||
* Position camera by placing aligning crosshair on image with top surface of block | |||
* Take photos of blue sheet with blocks starting from 60mm collimator size to 5mm. | * Take photos of blue sheet with blocks starting from 60mm collimator size to 5mm. | ||
* Remove blue sheet – repeat measurements | * Remove blue sheet – repeat measurements | ||
* Position camera by placing aligning crosshair on image with top surface of block | |||
* Use new set of blocks and blue sheet - repeat measurements | * Use new set of blocks and blue sheet - repeat measurements | ||
<!-- ------------------------------------table1------------------------------------------ --> | <!-- ------------------------------------table1------------------------------------------ --> | ||
Latest revision as of 10:46, 17 November 2022
Third experimental measurements with Cyberknife at Birmingham. Green and blue scintillator thin sheet measurements with measurements of green radiation damage.
Setup
Schematic
Photos of setup
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 plastic.
- Check optical axis aligned with top surface using crosshair in the image analysis.
- Used shims to level top surface of plastic blocks and scintillator sheet
Camera settings
- Focal length 20mm
- lens focus distance – 0.5 (500mm)
- 53cm focal plane (phi on camera ) to sheet
- f-number 5.6
Data taking
Plan
- Position camera by placing aligning crosshair on image with top surface of block
- Take photos of blue sheet with blocks starting from 60mm collimator size to 5mm.
- Remove blue sheet – repeat measurements
- Position camera by placing aligning crosshair on image with top surface of block
- Use new set of blocks and blue sheet - repeat measurements
| 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 | 
| |