Quasar Phantoms

Quasar Phantoms

Quality Assurance phantoms for performance based verification testing of CT Simulators and Radiation Therapy Planning Systems.

Used for commissioning new systems and testing bug fixes, upgrades and repairs. Get your systems online faster, and keep them online with greater confidence.

Designed by QA experts (1) in response to the TG 53 (2) report, the phantoms improve patient outcomes through comprehensive characterization of your CT Sim and RTPS.

The only system of its kind for efficiently testing a broad range of non dosimetric features and functions including:

	Geometric accuracy of multiplanar CT image reconstructions
	Graphical displays of 3D radiation beams
	Digitally reconstructed radiographs
	Automatic, semi-automatic and manual boundary identification tools and automargining
	Representation and manipulation of contoured patient anatomy
	Dose volume histograms
	Conversion of CT number to relative electron density.
	Test your systems from end to end, including information transferred by Dicom.
	Evaluate beam and collimator alignment on portal images using the Beam Geometry phantom.

Brochures

EXRADIN Ionization Chambers pdf brochure

ACE (Axial, Coronal, Edge ) PHANTOM pdf brochure

IMRT Dose Verification PHANTOM pdf brochure

QUASAR Body and Beam Geometry PHANTOM pdf brochure : QUASAR ( Quality Assurance System for Advanced Radiotherapy )

Go To IMRT Instrument Selection Worksheet

Quasar Body Phantom - SeeDOS Code QBDP

Quasar Beam Geometry Phantom - SeeDOS Code QBGP

1) A Quality Assurance Phantom for Three-Dimensional Radiation Therapy Treatment Planning, Tim Craig, Denis Brochu, and Jake Van Dyk; Int. J. Radiation Oncology Biol. Phys., Vol. 44, No. 4, pp. 955-966, 1999.

2) AAPM Radiation Therapy Committee Task Group 53: Quality Assurance for Clinical Radiotherapy Treatment Planning, Benedick Fraass, Karen Doppke, Margie Hunt, Gerald Kutcher, George Starkschall, Robin Stern, Jake Van Dyk; Med. Phys. 25 (10), October 1998, pp. 1773-1829.

QUASAR Beam Geometry Phantom, SeeDOS Code QBGP

Designed to test the complex 3D imaging functions of CT Simulators and Radiation Therapy Planning

Systems, the QUASAR Beam Geometry phantom reproduces the divergent therapy beam in acrylic. Its

features include :

	5, 10, and 15 cm collimated beam phantom, 17 cm long
	Phantom rotates about isocenter on vertical (couch) and horizontal (gantry) axes
	Rotational scale readouts correspond to ICRU Report 42
	1 mm diameter steel ball located at the isocenter
	"Z" wire fiducial marker in base
	3 point levelling system with built in level indicator
	Laser alignment marks
	Phantom overall height 28 cm, width 36.6 cm, length 42.5 cm
	Weight 13 kg
	Materials: acrylic, Delrin, nylon, steel ball, steel wire, rubber
	Container for storage and handling, optional shipping case
	User's Guide with Quality Assurance Worksheets

QUASAR Body Phantom, SeeDOS Code QBDP

Designed to test the complex 3D geometrical features and functions of CT Simulators and Radiation

Therapy Planning systems, the QUASAR Body Phantom incorporates a variety of test objects in a solid

acrylic housing.

	Main body component, acrylic, oval shape, 20 cm high, 30 cm wide, 8 cm long
	3 openings for Cylindrical Inserts, each opening is 8 cm diameter by 8 cm long
	Electron density extension, 12 cm diameter with 5 openings at 2.5 cm diameter
	Laser alignment marks
	Phantom overall height, 25.4 cm, width 36.6 cm, length 28.4 cm, weight 9.3 kg
	Materials: acrylic, Delrin, polyethylene, epoxy resin (Electron Density rods), rubber
	Container for storage and handling, optional shipping case
	User's Guide with Quality Assurance Worksheets

Test Objects, within Cylindrical Inserts:

	27 cc acrylic cube within a 125 cc Delrin cube, within an 8 cm diameter acrylic cylinder, 8 cm long
	20° air wedge (40 cc) within an 8 cm diameter acrylic cylinder including two Delrin cylinders:

• 5 mm diameter by 5 cm long (.98 cc)

• 10 mm diameter by 5 cm long (3.9 cc)

	60° air wedge in 8 cm diameter acrylic
	Electron Density rods, 2.5 cm diameter by 2.5 cm long; relative electron density (RED)

• Lung (Inhale) RED = 0.190

• Polyethylene RED = 0.945

• Water Equivalent RED = 1.002

• Trabecular Bone RED = 1.117

• Dense Bone RED = 1.512

For a more detailed account of the Quasar phantoms please click here (pdf file)

For details of the features and functions of the Quasar Body Phantom, please click here (pdf file)

For details of the features and functions of the Quasar Beam Geometry Phantom, please click here (pdf file)

For an Acrobat Reader to read the pdf file please click on the adjacent Acrobat logo

If you are interested in any of the products mentioned here, please complete a Quotation Request Form or an

Enquiry Form so that we may promptly respond to your detailed request.

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Please contact Colin Walters at cwalters@seedos.com if you would like further information or you have questions

or comments about this web site.
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