MRI test phantom HD-C03

for ultrasound imagingfor CT scanfor radiography

Overview
The Adult Head (Dynamic, Openable) phantom is visible on Ultrasound, MRI and X-Ray/CT scans. It features an anatomically shaped brain made of an ultra-soft polyurethane-based material and a realistic three-layered skull bone with an inner diploe layer. The phantom includes realistic blood vessels and an inflatable ventricular system that can be filled with liquid.

Imaging & Applications
The phantom is suitable for T2-weighted MRI imaging (tissue T2 relaxation times are realistic) and yields very good results with Proton Density imaging methods. It can also be imaged with T1-weighted methods though T1 values are less realistic (approximately 100 ms). The phantom can be used for angiography and accepts a variety of contrast media including Barium-sulfate, Iodine-based, Gadolinium-based, Microbubble and Iron Oxide-based agents.

Anatomy & Key Features

• Skull with temporal and suboccipital windows for transcranial Doppler ultrasound — openable and removable calvaria
• Anatomically shaped brain parenchyma (grey matter)
• Complex brain vessels including an incorporated Circle of Willis (vessel inner diameters: 2 mm, 3 mm, 4 mm)
• One bifurcation, one stenosis, two aneurysms
• Vessels connected with the neck and plastic connectors for filling
• Entire ventricular system (lateral, third, fourth ventricles), inflatable and fillable
• Alignment markings and acoustically correct skin-mimicking material

Preparation & Use
Prior to imaging, fill the ventricles completely with water or chosen contrast agent using the filling tube on the back of the brain. After filling, plug the tube with the removable silicone plug. For ultrasound scanning, fill the skull cavity with water (via syringe or pouring through the back opening) or submerge the head in a water tank and remove air bubbles between skull and brain. After testing, drain and dry before storage.

Appearance
Default appearance: Amber Translucent. A skin appearance option is available upon request. Small variations in appearance may be present due to material characteristics and production tolerances.

Technical properties (selected table)
Type of Tissue | Sound Velocity [m/s] | Density [g/cm3] | Hardness [Shore 00] | T2 [ms] | Speckles | Attenuation at 2.25 MHz [dB/cm]
Cortical Bone | 3000 ± 30 | 2.31 | N/A | N/A | N/A | 6.4 ± 0.3
Trabecular Bone | 2800 ± 50 | 2.03 | N/A | N/A | N/A | 21 ± 2
Brain Matter | 1400 ± 10 | 0.99 | 20 | 70 | YES | 1.0 ± 0.2
Skin/Body Tissue | 1400 ± 10 | 1.02 | 60 | 50 | NO | 1.7 ± 0.2

Thermal properties of bone-mimicking tissue (selected)
Thermal Conductivity: 0.776 W/m K | Volumetric Specific Heat Capacity: 1.040 MJ/m^3 K | Thermal Diffusivity: 0.746 mm^2/s | Thermal Resistivity: 1.289 m K/W | Specific Heat: 0.978 J/g °C | Speed of Sound: 3070 m/s

HU values of tissue-mimicking materials (selected)
S.No. | Tissue Type | HU Value (average)
1 | Brain Tissue | -25
2 | Trabecular Bone | 800
3 | Cortical Bone | 1300
4 | Skin Tissue | -25

Head phantoms - selected comparative features
Feature | Dynamic Openable Head | Static Head | Dynamic Head | Standard Head
Skull | ✓ | ✓ | ✓ | ✓
Openable/removable calvaria | ✓ | ✖ | ✖ | ✖
Brain ventricles | ✓ | ✖ | ✖ | ✓
Brain vessels (inc. Circle of Willis) | ✓ (2/3/4 mm) | ✖ | ✓ (2/3/4 mm) | ✖

Included in order (standard)

• Adult Head (Dynamic, Openable) phantom
• User manual / assembly instructions
• 2-year warranty
• Hard carry case

Caractéristiques / spécifications techniques

• Denomination commerciale: Adult Head (Dynamic, Openable)
• SKU / Product code: HD-C03
• Phantom size: 12 x 9 x 7 inches (approx.)
• Shipment size: 23 x 14 x 10 inches
• Phantom weight: ~17 lbs; Shipment weight: ~22 lbs
• Ventricles: total volume 35 mL; inner diameter ~9.5 mm; outer diameter ~15.1 mm; attached tube ~50 mm long
• Vessels: inner diameters 2 mm (blue), 3 mm (green), 4 mm (red)
• Brain material: ultra-soft polyurethane-based tissue-mimicking material (stable over time, does not dry out)
• Skull: realistic three-layered structure with inner diploe; synthetic bone materials are ceramic-reinforced epoxy-based composite
• Coating: standard phantoms coated with a harder urethane rubber protective layer (glossy finish); coating increases measured Shore 00 hardness by ~30 points
• Ultrasound properties: acoustically correct skin-mimicking material, specified sound velocities and attenuation values per tissue type
• MRI properties: realistic T2 relaxation times (optimized for T2-weighted imaging); Proton Density imaging yields very good results; T1 values approx. 100 ms
• Contrast compatibility: compatible with Barium-sulfate, Iodine-based, Gadolinium-based, Microbubble and Iron Oxide-based contrast agents
• Features: openable and removable calvaria, plastic connectors, alignment markings, vessels connected to neck for filling, realistic aneurysms/stenosis/bifurcation