JosephBateman: /* Joe Bateman */

2025-02-10T16:22:51Z

Joe Bateman

← Older revision		Revision as of 16:22, 10 February 2025
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	* Re-did simulations in TOPAS (ongoing) and FRED with adjusted input beam size from DICOM for 3x3 and 5x5 cm box fields		* Re-did simulations in TOPAS (ongoing) and FRED with adjusted input beam size from DICOM for 3x3 and 5x5 cm box fields
	** Calculated new input beam size as: σ_P = (σ_iso × (SAD - d)) / SAD Where:		** Calculated new input beam size as: σ_P = (σ_iso × (SAD - d)) / SAD Where:
			*** σ_P is spot size at position P
	σ_P is spot size at position P		*** σ_iso is spot size from DICOM (at isocenter)
	σ_iso is spot size from DICOM (at isocenter)		*** SAD is virtual source-axis distance
	SAD is virtual source-axis distance		*** d is distance from isocenter to position P
	d is distance from isocenter to position P		** Using d as 10 cm upstream from phantom surface

	* Resulting shape looks more characteristic of TPS distribution.		* Resulting shape looks more characteristic of TPS distribution.

JosephBateman: /* Joe Bateman */

2025-02-10T16:21:52Z

Joe Bateman

← Older revision		Revision as of 16:21, 10 February 2025
Line 58:		Line 58:

	=== [[ELogs/JoeBateman\|Joe Bateman]] ===		=== [[ELogs/JoeBateman\|Joe Bateman]] ===

			* Re-did simulations in TOPAS (ongoing) and FRED with adjusted input beam size from DICOM for 3x3 and 5x5 cm box fields
			** Calculated new input beam size as: σ_P = (σ_iso × (SAD - d)) / SAD Where:

			σ_P is spot size at position P
			σ_iso is spot size from DICOM (at isocenter)
			SAD is virtual source-axis distance
			d is distance from isocenter to position P

			* Resulting shape looks more characteristic of TPS distribution.

JosephBateman: Created page with "== Minutes for UCL Proton Beam Therapy Group Meetings, 4th February == === Present === '''Joe Bateman''', '''Sonia Escribano''', '''Simon Jolly''', '''Raffaella Radogna (via Teams)''', '''Kirsty Hall (from Hamamatsu)''' * Discussion with Kirsty Hall from Hamamatsu about photodiode arrays for scintillating fibre array to allow for better integration with QuARC. * Kirsty to investigate two possible routes for going forward: ** Possibility of having on board DDC or way o..."

2025-02-10T16:18:32Z

Created page with "== Minutes for UCL Proton Beam Therapy Group Meetings, 4th February == === Present === '''Joe Bateman''', '''Sonia Escribano''', '''Simon Jolly''', '''Raffaella Radogna (via Teams)''', '''Kirsty Hall (from Hamamatsu)''' * Discussion with Kirsty Hall from Hamamatsu about photodiode arrays for scintillating fibre array to allow for better integration with QuARC. * Kirsty to investigate two possible routes for going forward: ** Possibility of having on board DDC or way o..."

New page

== Minutes for UCL Proton Beam Therapy Group Meetings, 4th February ==

=== Present ===

'''Joe Bateman''', '''Sonia Escribano''', '''Simon Jolly''', '''Raffaella Radogna (via Teams)''', '''Kirsty Hall (from Hamamatsu)'''

* Discussion with Kirsty Hall from Hamamatsu about photodiode arrays for scintillating fibre array to allow for better integration with QuARC.
* Kirsty to investigate two possible routes for going forward:
** Possibility of having on board DDC or way of connecting S13885-128 photodiode array to DDC board.
** Possibility of having surface mounted photodiodes (such as S12859-021) shrunk to a smaller size so that pixel pitch is comparable with 0.5mm fibre diameter.
* Also will look into questions Raffy has a about current experience with S13885-128 photodiode array, i.e.:
** If observed response at saturation (e.g., decreasing signal rather than plateau or charge sharing among neighbours) is expected
** How response of individual photodiodes within array vary and how to characterise this.

=== [[ELogs/RaffaellaRadogna|Raffaella Radogna]] ===

* Discussed with Bari mech eng Producing second prototype with resin material harry suggested - use inventor files (should be able to open fusion) will share with them once harry has finished with the fusion file
* Produce 2 new prototypes (frame + fibres + screws etc) and have one sent here
* Beam test in Trento
** ~5s per beam
** 10 beam deliveries each for CONV and UHDR calibrations (but may only need 8)
** Background measurement at FSR for 12.5pC acquisition and for for FLASH
** Happy to cut out as many pristine Bragg peaks as necessary to keep within FLASH time limits at Trento
** I.e. 1 minute = 12 Bragg peaks at ~5s per measurements
** Or Bragg peaks at lower measurement time per FLASH Bragg peak (i.e. <5 s)
** Spot scanning at CONV dose rates
** Potentially WET measurement of fibres at next UCLH if using giraffe on new QuARC electronics

=== [[ELogs/SoniaEscribano|Sonia Escribano]] ===

* Looking at new calibration method - now works with txt file that is generated with calibration values
* Problem with calibration
** Need calibRMS - need separate file with these values?
*** Important for the fit
*** Include rms beneath calibration coefficients
** How do we save name of header file for calibration file
** Include in header file which files were used to generate calibration coefficients

* In new file structure maybe have new file directory for background data, i.e. calibration, background, date
** For now do it manually
* New calibration and fitting procedure
** generate calibration txt files using shoot throughs
** Apply calibration values generates calibrated txt with every single measurement
** Fit data averaged at 25 Hz -read calibrated data and fit at desired frequency (default 25hz)
* Things for new experiment
** Raw data = 160*8 (hex length and 8 modules)
** Calibration: 4 calibration_i files
** Calibrate data
** Initially split the raw data in two files for each Bragg peak
* Messaged harry about scintillators waiting to hear from John and Wayne but still hasn't sent them scintillator sheets yet
* Simon and Sonia to check final design on fusion

* How do you ensure consistency between modules if there's difference in coupling etc
** Take Manchester data and do shoot-through calibration in current way then apply it to one of the shoot-through calibration files and see how it looks for each module (i.e. treat each module independently)
** Need to find a way to scale to dose in each of the modules

=== [[ELogs/JoeBateman|Joe Bateman]] ===

Proton Calorimetry/Meetings/2025/02/04 - Revision history

JosephBateman: /* Joe Bateman */

JosephBateman: /* Joe Bateman */