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Liqui-Phil™ Phantoms
Hollow phantoms that can be filled with liquid for nuclear medicine and MRI studies
The Phantom Laboratory manufactures two hollow, liquid-fillable phantoms which are applicable to nuclear medicine and magnetic resonance imaging studies: the Liqui-Phil™ Head Phantom and the Liqui-Phil™ Organ Scanning Phantom. Both phantoms are built to approximate the proportions of a fiftieth percentile male and are constructed of cellulose acetate butyrate, a transparent material that provides strength and low water absorption.
Liqui-Phil™ Head
Liqui-Phil™ Organ Scanning Phantom
The Liqui-Phil™ Organ Scanning Phantom This phantom duplicates the torso of a male from the diaphragm to the upper pelvis. It is equipped with access covers to allow phantom tumors and organs - liver, spleen, kidneys, stomach, and pancreas - to be positioned within the torso. Each organ has screw ports for adding or removing liquids, plus a large access port for inserting and removing simulated tumors. Solid and liquid-fillable phantom tumors are available in ovoid and spherical shapes. The organs and tumors for the Organ Scanning Phantom are purchased separately. Liqui-Phil™ Phantoms are excellent for calibration, quality assurance, research, and training in nuclear medicine and SPECT studies.
The Liqui-Phil™ Head Phantom is a liquid-fillable head form which duplicates the outer contours of an average size male head and neck. The phantom has three ports: one at the base of the neck and two on the upper sides of the head. The port at the base of the neck is mounted on an access plate which can be removed for insertion of tumors. The access ports all have o-ring sealed, spherical mounting points. Tumors mounted on their support rods can be positioned in a variety of ways from these ports. Tumors included: 3cm diameter, hollow, spherical; 2cm diameter hollow, ovoid x 3cm long; 2cm diameter hollow, ovoid x 4cm long.
Tumors - Hot and cold spots within the organs or the phantom are created by either filling the tumors with contrast solutions or placing them cold inside contrast filled organs.
Optional tumors:
- Spherical, hollow tumor set of seven with one each of the following diameters: 1cm, 1.5cm, 2cm, 3cm, 4cm, 5cm, 6cm
- Ovoid, hollow tumor set of five with one each of the following diameters: 1.5cm x 3cm long, 2cm x 3cm long, 2cm x 4cm long, 3cm x 4cm long and 3cm x 5cm long
- Combination set of six hollow tumors with one each of the following sizes: Spherical: 1cm, 1.5cm, 2cm and Ovoid: 1.5cm x 3cm long, 2m x 3cm long, 2cm x 4cm long
- Combination set of nine hollow tumors with one each of the following sizes: Spherical: 1cm, 1.5cm, 2cm, 3cm and Ovoid: 1.5cm x 3cm long, 2cm x 3cm long, 2cm x 4cm long, 3cm x 4cm long, 3cm x 5cm long
Precise, Comprehensive Testing of MRI Scanners
Magphan® Phantoms are designed to perform a wide range of precision performance evaluations of Magnetic Resonance Imaging (MRI) Scanners.
The design criteria for the Magphan® phantoms are based on physicist, Dr. David Goodenough's extensive experience with MRI system evaluation and his well documented research into the quantification of image system performance tests. The test objects that make up the current Magphan® models embody two decades of scientific evaluation and field experience.
Cylindrical and Spherical Magphans®
Spherical Magphan® housing
The Magphan®'s patented spherical design combines precise alignment of spherical geometry with cubic geometry. As magnetic field characteristics are mapped according to spherical harmonics, natural magnetic fields extend to diagonally symmetric volumes (DSVs), or spheres. This symmetry is the reason the AAPM Task Group's Report number 6a, titled "Acceptance Testing of Magnetic Resonance Imaging Systems," stated, "The sperical shape is recommended for reasons of symmetry." Imaging performance is evaluated in the transaxial, coronal, sagittal and oblique planes by rotating the sphere.
The Magphan® is also available with a conventional cylindrical housing for test groups and manufacturers who prefer the conventional cylindrical shaped phantoms.
Spherical Magphan® (SMR100) is a urethane sphere composed of two hemispherical shells with an inner diameter of 20cm. The shells are connected with a simple threaded flange connecting ring. The test cube assembly can be quickly removed without tools for greater imaging flexibility and easy access for cleaning and maintenance.
Cylindrical Magphan® (SMR170) has a removable end plate for internal access. The acrylic cylinder has an outer diameter of 20cm and an inner diameter of 19cm.
Tests - Summary
- spatial uniformity
- signal-to-noise ratio (SNR)
- spherical geometry
- in-vitro sample testing
- geometric distortion (spatial linearity)
- pixel (matrix) size verification
- scan slice width and contiguity
- verification of patient alignment system
- spatial resolution up to 11 line pairs per cm (0.45mm resolution)
- low contrast sensitivity
- T1 and T2 measurements
- evaluation of 3-dimensional volume reconstruction
Conic section insert
Five-section insert
Provides a comprehensive
range of tests in one compact
unit...
• Slice thickness
• MTF evaluation
• Spatial resolution
• RF signal uniformity
• Magnetic field homogeneity
• And many others
The MRI Multipurpose Phantom monitors the overall performance of an MRI system. The parameters that can be measured include: slice thickness, slice orientation, interslice gap, magnetic field homogeneity, radio frequency signal uniformity, spatial resolution
in positive and negative contrast, and modulation transfer function. The phantom can also be used to evaluate quadrature setting, baseline correction, aspect ratio, and single T1 and T2 values.The phantom is constructed of non-magnetic materials. It is 9 inches in diameter, with two inserts, and is designed to be filled with an MRI signal-producing solution. One insert is a series of concentric conic sections. The other insert is made up of five
sections: one for positive contrast, two for slice evaluation, one for MTF evaluation, one for T1 and T2 evaluations.A void between the sections provides a fully flooded area for signal uniformity.
Specifications
Standard configuration
Phantom dimensions OD is 9 x 4.5 in (t)
Weight 6.82 lb (3.09 kg)
Optional accessories
Copper Sulfate, 1 gm/l (Model 76-903-7000)
Available model(s)
76-903 MRI Multipurpose Phantom
3D Slice Thickness/High Contrast Resolution Phantom (AAPM)
Model 76-908
Accurately evaluates:
• High-contrast resolution
• Slice thickness
• Gradient strength
• Slice position/separation
• Resonance frequency
• Designed to conform to
AAPM MRI specifications*Various sections are arranged within a cubical shape to make the phantom truly three dimensional. It contains slice thickness measuring sections, and a void between the inserts to allow for a signal-producing solution. Slice thickness and resolution information can be obtained in all three directions (transaxial, coronal, and sagittal)
without moving the phantom.
Specifications
Dimensions 6 x 6 x 5 in (15.24 x 15.24 x 12.70 cm)
Weight 3.46 lb (1.56 kg)
Optional accessories
Copper Sulfate, 1 gm/l (Model 76-903-7000)
Available model(s)
76-908 3D Slice Thickness/High Contrast Resolution Phantom (AAPM)
Uniformity/Linearity Phantom (AAPM) Model 76-907
Accurately evaluates:
• Spatial linearity
• Image artifact
• Signal-to-noise
• Resonance frequency
• Quadrature error
• Designed to conform to AAPM MRI
specifications*Specifications
Dimensions 13 x 13 x 4 in (33.02 x 33.02 x 10.16 cm)
Weight 11.68 lb (5.30 kg)
Optional accessories
Copper Sulfate, 1 gm/l (Model 76-903-7000)
Available model(s)
76-907 Uniformity/Linearity Phantom (AAPM)
This large, flat flood phantom can be filled with an MR signal-producing solution. The square grid section contains orientation reference markers, and the flood section has an image artifact cylinder.
* These phantoms conform to the AAPM Specifications contained in the report: “Quality Assurance Methods and Phantoms for Magnetic Resonance Imaging, ”issued by the AAPM NMR Task Group No. 1 (article appeared in Medical Physics, 17:2 (Mar/Apr 1990). This report has also been co-sponsored by the American College of Radiology MR Committee on Imaging Technology and
Equipment.
- Specifically designed for comprehensive testing of surface coils
- Provides proper geometry not found in conventional head or body phantoms
Accurately evaluates:
• High spatial resolution
• RF signal brightness profile
• Slice thickness
• Slice to slice gap
• MTF evaluation
• Magnetic field uniformity
• Gradient linearity
• Image artifacts
• And more!
Star pattern insert
Square grid insert
Five-section insert
The use of surface coils in Magnetic Resonance Imaging (MRI) has become an important part of the clinical operations in most MR facilities. Surface coils are preferred in some MR studies, in part, because their use can minimize motion artifacts, obtain high signal-to-noise ratio in the areas closer to the surface, and obtain high resolution images of smaller areas of interest.
This phantom was specifically designed for acceptance testing and routine QC of surface coils. It provides the proper geometry not found in conventional head or body phantoms.
The phantom is constructed of non-magnetic Plexiglas®. It is rectangular in shape, contains three inserts, and is designed to be filled with an MRI signal-producing solution. The void between
the inserts provides a fully flooded area.Specifications
Outer dimensions 13 (w) x 6 (d) x 6.875 in (h) (33.02 x 15.24 x 17.46 cm)
Inner dimensions 12 (w) x 5 (d) x 6 in (h) (30.49 x 12.7 x 15.24 cm)
Weight 7.96 lb (3.61 kg)
Optional accessories
Copper Sulfate, 1 gm/l (Model 76-903-7000)
Available model(s)
76-904 MRI Surface Coil Phantom
3D Anthropomorphic Skull Phantom
For Rapid Assessment of Image Displacement in Gamma Knife and Other Treatment Planning Systems
The CIRS skull phantom is made from materials which can be imaged using x-ray, CT and MR. The skull is manufactured from an epoxy based tissue substitute. The interstitial and surrounding soft tissues are made from a proprietary water based polymer. The gel can be formulated to accommodate specific requirements such as x-ray attenuation, contrast, and MR response. The entire phantom is encased in a vacuum formed plastic shell for ease of use and durability.Available options include:
- Wire or point targets in various locations
- Simulated tumors
Skull phantoms are made to order. Contact CIRS if you have a unique requirement.
Model 603
Features
Images well on T1, T2 and 3DTOF MRI acquisitions
Images well on CT scan
Stereotactic frame can be applied to special reinforced pads
Images can be imported into stereotactic localization program
CT scans can be used to assess MRI accuracy
3D Skull Phantom Specifications
- Three dimensional orthogonal acrylic rod matrix through cranial volume enables assessment of image distortions
- Optional lesion also available
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