Tomography test phantom

for CT scanfor nuclear imagingspine

Presentation
The Anthropomorphic torso phantom reproduces the upper torso anatomy of an adult patient (medium to large build), including simulated lungs, liver and spine. It enables testing of ECT (SPECT/CT, PET/CT) systems performance under realistic activity distribution, non-uniform attenuation and scatter conditions.

Construction and components
The phantom is made of a large transparent PMMA anatomical volume with lung inserts that can be filled with polystyrene beads and water to mimic real lung parenchyma density. Optional modules are available:

• Cardiac insert (ECT/CAR/I)
• Fillable spine insert
• Spine insert simulating liquid bone

Functions and uses
It is used for protocol validation, characterization of attenuation and scatter corrections, evaluation of cardiac ECT reconstructions and research studies.

Key points

• Realistic anthropomorphic torso with simulated lungs, liver and spine
• Fillable lung inserts (water + polystyrene beads) to simulate tissue density
• Dimensions representative of a medium to large adult (380 × 260 mm)
• Compatible with optional cardiac insert
• Spine inserts available: fillable or "liquid bone"
• Reproduces realistic distributions of attenuation and radioactivity

Main applications

• Assessment of cardiac ECT acquisition and reconstruction methods
• Analysis of non-uniform attenuation corrections and scatter effects
• Validation of quantitative SPECT/CT and PET/CT protocols
• Research studies and inter-system comparisons

Characteristics / technical specifications

• Material: transparent PMMA
• External lateral dimension: ~380 mm
• Internal lateral dimension: ~360 mm
• External antero-posterior dimension: ~260 mm
• Internal antero-posterior dimension: ~240 mm
• Wall thickness: ~9.5 mm
• Total empty volume: ~13.4 L
• Left lung (without beads): ~0.9 L
• Right lung (without beads): ~1.1 L
• Left lung (with beads): ~0.36 L
• Right lung (with beads): ~0.44 L
• Liver: ~1.2 L
• Background volume: ~1.2 L
• Cylinder with lung + spine inserts: ~7.4 L
• Models: ECT/TOR/P - Anthropomorphic torso phantom