Radiotherapy/Experimental Runs/2020-02-04: Difference between revisions

From PBTWiki
Jump to navigation Jump to search
No edit summary
 
(7 intermediate revisions by the same user not shown)
Line 6: Line 6:
=== Schematic ===
=== Schematic ===
<div class="image600px" style="text-align: center;">
<div class="image600px" style="text-align: center;">
https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/setup.png
https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/setup.png
</div>
</div>


=== Photos of setup ===
<div class="image300px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/_DSC4718.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/_DSC4718.JPG]
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/_DSC4715.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/_DSC4715.JPG]
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/_DSC4713.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/_DSC4713.JPG]
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/_DSC4716.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/_DSC4716.JPG]
</div>
(Inside pelicase, outside pelicase, collimators, through pelicase window)
=== Pre-data Taking Information and Notes ===
=== Pre-data Taking Information and Notes ===


* Used 200mmx200mmx2mm green scintillator sheet polystyrene base sandwiched by two 200mmx200mmx50mm polystyrene clear plastic blocks  
* Phantom
* 53cm from lens to sheet
** 200mmx200mmx2mm blue scintillator sheet polystyrene base  
** sandwiched by two 200mmx200mmx50mm polystyrene clear plastic blocks  
* 565mm from lens to sheet
* Check camera in focus with ruler on the sheet
* Check camera in focus with ruler on the sheet
* Near/Far limit of focus 49.4cm 57.1cm calculated using https://dofmaster.com/dofjs.html
* Ruler in focus at sheet
* Pelicase on couch
* Scintillator blocks aligned to laser cross hairs
* Scintillator blocks aligned to laser cross hairs
* 785 mm source to surface distance suitable for output factor/PDD/profile measurements.
* 785 mm source to surface distance suitable for output factor/PDD/profile measurements.
* Room lights out and pelicase window open.
* Wooden box is covered with black cloth
* Check optical axis aligned with top surface using crosshair in the image analysis.
* Camera height adjusted with wooden plates
* Arrived at hospital at 11am, finished data taking at 5pm
* Top surfaces of plastic blocks and sheet aligned with paper underneath


== Data Taking ==
== Data Taking ==
* All images taken with Nikon D7000, 20mm lens, f/2.8, 400ISO
* All images taken with  
* Used camera control pro 2 app
** Canon EOS 1100D
** 18-55mm lens
** f/5
** 200ISO
** 30s exposure
* Beam turned on for a given amount of time within the 30s exposure
* This is noted in monitor units, with the beam having constant 1000MU/minute
 
* Used EOS utility app for controlling camera
* Image of ruler taken at sheet for pixels to mm conversion
* Image of ruler taken at sheet for pixels to mm conversion
* 5 images taken at each collimator size with 1 background image each.
* 3 images taken at each collimator size with 1 background image each.
* Change exposure time until near max saturation - get's best bit depth
 
* View data analysis [https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/data_analysis.pdf here]
<!-- ------------------------------------table3------------------------------------------ -->


<!-- ------------------------------------table1------------------------------------------ -->
<b> First run </b>
{|class="wikitable" style="display: inline-table;"
{|class="wikitable" style="display: inline-table;"
!colspan="4" | With scintillator sheet
|-
!Collimator Size (mm)
!Collimator Size (mm)
!Exposure (s)
!Monitor Units
!Image
!With sheet
!Comments
!No sheet
|-
|-
| 5 || 30 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_5mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_5mm.jpg]
| 5 || 400 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_098.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_098.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_166.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_166.JPG]
</div>
</div>
|-
|-
| 7.5 || 20 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_7-5mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_7-5mm.jpg]
| 7.5 || 400 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_101.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_101.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_163.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_163.JPG]
</div>
</div>
|-
|-
| 10 || 15 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_10mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_10mm.jpg]
| 10 || 400 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_104.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_104.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_160.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_160.JPG]
</div>
</div>
|-
|-
| 12.5 || 10 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_12-5mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_12-5mm.jpg]
| 12.5 || 400 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_107.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_107.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_157.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_157.JPG]
</div>
</div>
|-
|-
| 15 || 8 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_15mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_15mm.jpg]
| 15 || 400 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_110.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_110.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_153.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_153.JPG]
</div>
</div>
|-
|-
| 20 || 8 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_20mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_20mm.jpg]
| 20 || 400 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_113.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_113.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_150.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_150.JPG]
</div>
</div>
|-
|-
| 25 || 6 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_25mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_25mm.jpg]
| 25 || 300 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_116.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_116.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_147.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_147.JPG]
</div>
</div>
|-
|-
| 30 || 6 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_30mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_30mm.jpg]
| 30 || 300 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_119.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_119.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_144.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_144.JPG]
</div>
</div>
|-
|-
| 35 || 5 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_35mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_35mm.jpg]
| 35 || 250 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_122.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_122.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_141.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_141.JPG]
</div>
</div>
|-
|-
| 40 || 4 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_40mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_40mm.jpg]
| 40 || 250 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_125.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_125.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_138.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_138.JPG]
</div>
</div>
|-
|-
| 50 || 3 || <div class="image150px" style="text-align: center;">
 
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_50mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_50mm.jpg]
| 50 || 150 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_128.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_128.JPG]
</div>
|| <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_135.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_135.JPG]
</div>
</div>
|-
|-
| 60 || 3 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_60mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_1/size_60mm.jpg]
</div>
|-
<!-- ------------------------------------table2------------------------------------------ -->


{|class="wikitable" style="display: inline-table;"
| 60 || 150 || <div class="image150px" style="text-align: center;">
!colspan="4" | No scintillator sheet
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_095.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_095.JPG]
|-
</div>
!Collimator Size (mm)
|| <div class="image150px" style="text-align: center;">
!Exposure (s)
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_132.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_132.JPG]
!Image
!Comments
|-
| 60 || 3 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_1/size_60mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_1/size_60mm.jpg]
</div>
</div>
|| Can see green discolouration caused by previous irradiations. <br> Blocks must have been rotated by 90 when re-assembling
|-
|-


<!-- ------------------------------------table3------------------------------------------ -->
|}


{|class="wikitable" style="display: inline-table;"
== Before and after irradiation ==
!colspan="4" | With scintillator sheet
|-
!Collimator Size (mm)
!Exposure (s)
!Image
!Comments
|-
| 5 || 30 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_5mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_5mm.jpg]
</div>
|-
| 7.5 || 20 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_7-5mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_7-5mm.jpg]
</div>
|-
| 10 || 15 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_10mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_10mm.jpg]
</div>
|-
| 12.5 || 10 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_12-5mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_12-5mm.jpg]
</div>
|-
| 15 || 8 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_15mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_15mm.jpg]
</div>
|-
| 20 || 8 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_20mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_20mm.jpg]
</div>
|-
| 25 || 6 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_25mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_25mm.jpg]
</div>
|-
| 30 || 6 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_30mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_30mm.jpg]
</div>
|-
| 35 || 5 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_35mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_35mm.jpg]
</div>
|-
| 40 || 4 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_40mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_40mm.jpg]
</div>
|-
| 50 || 3 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_50mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_50mm.jpg]
</div>
|-
| 60 || 3 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_60mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/sheet_2/size_60mm.jpg]
</div>
||
Green discolouration probably from scintillator sheet. <br> Rotated by 90 when re-assembling blocks and sheet
|-
<br>
<b> Second run </b>
<br>
Replaced plastic blocks from first run with new un-irradiated plastic blocks, but using same green scintillator sheet.
<br>
<!-- ------------------------------------table4------------------------------------------ -->


{|class="wikitable" style="display: inline-table;"
<div class="image300px" style="text-align: center;">
!colspan="4" | No scintillator sheet
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/5mm_010.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/5mm_010.JPG]
|-
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_092.JPG https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Feb2020/calibration_092.JPG]
!Collimator Size (mm)
!Exposure (s)
!Image
!Comments
|-
| 5 || 30 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_5mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_5mm.jpg]
</div>
</div>
|-
Green discolouration observed after irradiation. Only present when the lights are on
| 7.5 || 20 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_7-5mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_7-5mm.jpg]
</div>
|-
| 10 || 15 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_10mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_10mm.jpg]
</div>
|-
| 12.5 || 10 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_12-5mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_12-5mm.jpg]
</div>
|-
| 15 || 8 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_15mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_15mm.jpg]
</div>
|-
| 20 || 8 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_20mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_20mm.jpg]
</div>
|-
| 25 || 6 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_25mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_25mm.jpg]
</div>
|-
| 30 || 6 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_30mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_30mm.jpg]
</div>
|-
| 35 || 5 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_35mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_35mm.jpg]
</div>
|-
| 40 || 4 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_40mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_40mm.jpg]
</div>
|-
| 50 || 3 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_50mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_50mm.jpg]
</div>
|-
| 60 || 3 || <div class="image150px" style="text-align: center;">
[https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_60mm.jpg https://www.hep.ucl.ac.uk/pbt/wikiData/images/Cyberknife_Birmingham_Jul2022/nosheet_2/size_60mm.jpg]
</div>
|-
 
<!--
Section commented out
-->

Latest revision as of 09:51, 15 September 2022

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

Setup

Schematic

setup.png

Pre-data Taking Information and Notes

  • Phantom
    • 200mmx200mmx2mm blue scintillator sheet polystyrene base
    • sandwiched by two 200mmx200mmx50mm polystyrene clear plastic blocks
  • 565mm from lens to sheet
  • Check camera in focus with ruler on the sheet
  • Ruler in focus at sheet
  • Scintillator blocks aligned to laser cross hairs
  • 785 mm source to surface distance suitable for output factor/PDD/profile measurements.
  • Wooden box is covered with black cloth
  • Camera height adjusted with wooden plates
  • Top surfaces of plastic blocks and sheet aligned with paper underneath

Data Taking

  • All images taken with
    • Canon EOS 1100D
    • 18-55mm lens
    • f/5
    • 200ISO
    • 30s exposure
  • Beam turned on for a given amount of time within the 30s exposure
  • This is noted in monitor units, with the beam having constant 1000MU/minute
  • Used EOS utility app for controlling camera
  • Image of ruler taken at sheet for pixels to mm conversion
  • 3 images taken at each collimator size with 1 background image each.


Collimator Size (mm) Monitor Units With sheet No sheet
5 400

calibration_098.JPG

calibration_166.JPG

7.5 400

calibration_101.JPG

calibration_163.JPG

10 400

calibration_104.JPG

calibration_160.JPG

12.5 400

calibration_107.JPG

calibration_157.JPG

15 400

calibration_110.JPG

calibration_153.JPG

20 400

calibration_113.JPG

calibration_150.JPG

25 300

calibration_116.JPG

calibration_147.JPG

30 300

calibration_119.JPG

calibration_144.JPG

35 250

calibration_122.JPG

calibration_141.JPG

40 250

calibration_125.JPG

calibration_138.JPG

50 150

calibration_128.JPG

calibration_135.JPG

60 150

calibration_095.JPG

calibration_132.JPG

Before and after irradiation

5mm_010.JPG calibration_092.JPG

Green discolouration observed after irradiation. Only present when the lights are on

Retrieved from "https://www.hep.ucl.ac.uk/pbt/pbtWiki/index.php?title=Radiotherapy/Experimental_Runs/2020-02-04&oldid=4801"