Alex Markovic

43 Pages·2017·3.74 MB·English

by  Alex Markovic

MAKING CUSTOMIZED BOLUS WITH A
3D PRINTER
Alex Markovic, PhD
Banner Health, North Colorado Medical Center, Greeley, CO
RMAAPM Annual Meeting
May 20, 2017
OUTLINE
(cid:1)Advantages of 3Dprinted bolus
(cid:1)Equipment and software
(cid:1)Clinical cases
(cid:1)Test case on a phantom
(cid:1)Dosimetry data
(cid:1)Other uses of 3d printing in radiation oncology
Greeley In the News
DISADVANTAGE OF
Axial
Narrow
TRADITIONAL BOLUS
bolus
coverin
g scar
(cid:1)Air gaps
(cid:1)Poor conformity
(cid:1)In many cases, the delivery
does not reflect the plan Coronal
ADVANTAGES OF 3D PRINTED BOLUS
(cid:1) Conformity
(cid:1) The treatment more closely
Ear
matches the plan
MERT
(cid:1) Reduces air gaps
(cid:1) Speeds up the placement
during setup
Face
(cid:1) We send a message to
patients that we customize
our treatments to them
Wrist
PROCESS TO PRINT A 3D BOLUS
Use TPS
Decide to use 3D contouring tools
bolus during tx to make a bolus
planning and calculate
dose
Export plan and
structure dicom
Load into Cura,
files to convert to
and print!
.STL file
Cura
Printed bolus
EQUIPMENT CHOICES - PRINTER
(cid:1) 1000 3D printers on the market!
(cid:1) Taz 6 – fused filament fabrication (FFF)
(cid:1) Print volume: 11x11x10”
(cid:1) Fast print speed (up to 200 mm/sec)
(cid:1) Wide array of filament choices including
flexible
(cid:1) Cost of printer+ optional tool-head: $3000.00
TAZ 6 PRINTER ANATOMY
Close up
Z-rails
Toolhead
Filament
X-rails
nozzle
Print bed
Y-rails
EQUIPMENT CHOICES - FILAMENT
(cid:1)Hard filament: easiest to print with:
(cid:1)PLA, ABS, co-polyester
(cid:1)Flexible filament – most difficult to work with:
Ninjaflex, Filaflex
(cid:1)Semi Flexible – easier to work with: Cheetah,
Polyflex
(cid:1)1 kg spool of filament = $70.00
Pick ONE, master it!
EQUIPMENT CHOICES - SOFTWARE
(cid:1)Basic:
(cid:1) Cura – slicer software, which converts an STL file to GCODE.
(cid:1) STL: contains the coordinates of the vertices of triangles that
make up part.
(cid:1) GCODE: contains instruction for the printer to print each layer
(cid:1)Advanced:
(cid:1) 3DCAD: Tinkercad, Fusion 360, Onshape
(cid:1) 3D manipulation: Blender, Meshmixer