Single PET-module Design Update 1 TRIMAGE Meeting Munich, Dec.
12,2014 WP 3 Design and optimization of PET-system Andreas
Seebacher, raytest
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Single PET-module Design Update 2
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3 Cassette design: Two solutions to be developed
-Solution1:Fully 3D-printed plastics to be painted with copper
paint (first solution to be tested, design already started)
-Solution 2: 3D printed holder + carbon tube around (more advanced
alternative) Decisions of the Pisa WP3 meeting:
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Single PET-module Design Update 4 Solution1a/b: Fully
3D-printed plastics to be painted with copper paint -Closed
3D-printed Positioning Plate -3 mm Glasfiberplate as module support
-U-shaped FPGA-board -Al-radiators on each ASIC -Aircooling from
above -Overall length: 313 mm (Solution 1a) or 363 mm ( Solution 1b
) Both solutions can be adapted into Solution 2 by changing the
shielding material from plastics to carbon fiber. All other parts
remain the same as in solution 1a/b Solution 1a Solution 1b
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Single PET-module Design Update 5 Main components
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Single PET-module Design Update 6 Components of the Single
PET-modul: Positioning Plate -3D-printed -PA2200 -Material coloured
black -Copper paint at bottom side -Overall tolerances min. +/- 0,1
mm
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Single PET-module Design Update 7 PET-module BackplateBackplate
-Material: POM -Provides stability to the module
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Single PET-module Design Update 8 Isolator Plate -Made from POM
-Bores for cooling hoses and cables -Positioning pins for assembly
Isolator Plate Material: POM
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Single PET-module Design Update 9 Universal End Plate - slide
rails for accurate positioning -bores for cooling hoses and
cabeling -Made from POM
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Single PET-module Design Update 10 The Glasfiber Plate:
-Additional stability for the Single PET module -Airchamber screwed
to it -Connects the two Backplates
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Single PET-module Design Update 11 Crystal matrix Delivery of
crystal matrix has to be decided ( seperate arrays or glued)
Optical shielding 100 mikron thick
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Single PET-module Design Update 12
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Single PET-module Design Update 13
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Single PET-module Design Update 14
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Single PET-module Design Update 15 SiPM with ASIC`s Gap 120
mikrons for opt. shielding
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Single PET-module Design Update 17 Board with FPGA -
U-shaped
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Single PET-module Design Update 18 Pin radiator (Aluminium)
Data: Bottom thickness: 2 mm Dimensions: 14 mm x 14 mm Height: 6 mm
Capacity: 0,8 W Minimum thermal resistance:72,5 K/W Material:
Al99,5
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Single PET-module Design Update 19 Air cooling of the ASIC`s -
mounted above the pin radiators -provides aircooling -Air will be
led away on backside of module
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Single PET-module Design Update 20 Detector Shielding -Made
from plastic or carbon fiber -Surfaces painted with copper
paint
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Single PET-module Design Update 21 PET-Ring - 18 modules
arranged in a circle -Pet-ring mounted within magnet -All suplies
from backside of the ring -Weight: ca. 45+ kg
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Single PET-module Design Update 22 Distance of 2 Crystal stacks
between two modules
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Single PET-module Design Update 23
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Single PET-module Design Update 24 What do we need? What
decisions need to be made! -CAD-model or Spec of magnet and RF-Coil
-Attachment points to mount Pet-ring to magnet -Specification of
the patients table -Delivery of crystal matrix has to be decided (
seperate arrays or glued) -Glueing procedure crystal/SiPM -Air or
water cooling? -Module shielding made from carbon or painted
plastic -Tolerance +/- 0,1 mm acceptable for rapid prototyping
parts? -Testing of mechanical components in magnetic field
-Intergration of head coil on Patients table -Integration of
EEG