2.10. Pet

The PET scanner generator page allows the user to create a PET scanner geometry, using his own configuration or from a set of predefined commercial scanners.

The geometry is composed by three components:
  1. Crystals block, a unit that contains many rectangular crystals

  2. Module, repetition of crystal blocks

  3. A repetition of the crystal modules using LATTICE.gifLATTICE around the patient

grab-pet-page.gif

2.10.1. Ribbon

Templates group

Label

Shortcut

Description

Template

Select a commercial PET scanner from flair templates

Action group

Label

Shortcut

Description

gear32.gif Create

Create the geometry input cards

2.10.2. Options

Axes Naming: The geometry will be generated along the Z axis on the X-Y plane. The naming of the axes used are the following:

Radial

Along the radius of the scanner. Origin is at X=Y=0

Azimuthal

Azimuthal angle of the scanner starting from X=0

Axial

Equal to the Z-direction

Label Frames:

NR

Number of crystals along the radial direction

DR

Thickness of crystals along the radial direction

dR

Gap between crystals along the radial direction

Nz

Number of crystals along the axial/Z direction

Dz

Thickness of crystals along the axial/Z direction

dz

Gap between crystals along the axial/Z direction

NTheta

Number of crystals along the azimuthal (theta) direction

DTheta

Thickness of crystals along the azimuthal (theta) direction

dTheta

Gap between crystals along the azimuthal (theta) direction

Module:
MR

Number of blocks along the radial direction

SR

Gap between blocks along the radial direction

Mz

Number of blocks along the axial/Z direction

Sz

Gap between blocks along the axial/Z direction

MTheta

Number of blocks along the azimuthal (theta) direction

STheta

Gap between blocks along the azimuthal (theta) direction

Pet:
Modules

Number of crystal modules composing the scanner

Radius

Inner(minimum) radius location of the crystal modules

Angle

Opening angle for half of the PET. 180deg is for a full PET system

Material

Material to be assigned to the crystals.

Warning

the material definition is not automatically inserted to the input. The user has to inserted it from the database

Region

FLUKA region name where the scanner will be placed. The region expression will be modified, all crystal modules will be subtracted from it