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IMRT Phantom for CT Imaging and Treatment Planning, SeeDOS Code 91230
New (March 2004) EXRADIN Ionization Chambers pdf brochure New (March 2004) ACE (Axial, Coronal, Edge ) PHANTOM pdf brochure New (March 2004) IMRT Dose Verification PHANTOM pdf brochure New (March 2004) QUASAR Body and Beam Geometry PHANTOM pdf brochure : QUASAR ( Quality Assurance System for Advanced Radiotherapy ) Download our detailed PDF for more information on the IMRT Phantom
Download our PDF explaining examples of IMRT Phantom Usage Download our PDF explaining IMRT Dose Calculation For a pictorial listing of available Cable Connectors, please click here Go To New IMRT phantom Comparison-Questions and Answers Go To IMRT Instrument Selection Worksheet For Technical Information on the construction and use of the phantoms, please click here NEW (Dec 2002) Exradin CT Ion Chamber -new brochure (Designed for use with phantoms having the typical 13.1mm cavity) (PDF) NEW (End of January 2003) New Virtual Water IMRT Phantom pdf brochure
SPECIFICATIONSIMRT DOSE VERIFICATION PHANTOM, SeeDOS Code Number 91230SeeDOS Code Number 91230 includes:2 Chamber Phantom Slabs, with 6 cavities each for ion chamber placement2 Acrylic Phantom Slabs, for build up thickness 2 Lung Phantom Slabs, with cavities for simulated lung inserts 16 Solid Acrylic Plugs, to fill unused ion chamber cavities 1 Solid Acrylic Plug, with cavity drilled for the ion chamber of your choice 1 Bone Equivalent Plug 1 Lung Equivalent Set, with 4 inserts for lung phantom voids
A typical set of products for IMRT Quality Assurance also includes the following:
IMRT Dosimetry
SeeDOS Code Description 92711 Exradin A14 Microchamber, 0.009cc 80031 ADCL Therapy Calibration, Co point in Water 90015 MAX 4000 Electrometer 80015-4 Electrometer Calibration Four Scales, for MAX 4000
Options
SeeDOS Code Description 70608 TLD/Diode/Mosfet Phantom for P/N 91230 50062 Additional Acrylic Phantom Slab for large volume patients RIT113 RIT113 Film Dosimetry Software, includes adaptec SCSI Interface card with EZ-SCSI Software, Vidar VXR-16 Dosimetry Pro X-Ray Film Digitizer and shipping and handling
TG-53 IMRT Non-Dosimetric Quality Assurance
SeeDOS Code Description QBGP Quasar Beam Geometry Phantom QBDP Quasar Body Phantom
Additional Items Needed Kodak XV verification film, Kodak TL therapy localisation film, Automatic film processor, light box, box end and crescent wrenches, styrofoam blocks, calibrated digital level, film cassette, tld chips.
PHANTOM OVERVIEW Chamber Phantom Slab has six cavities for thimble ion chamber measurement. The diameter of each cavity is ¾". Solid acrylic plugs are included to fill the cavities for simulated patient thickness. One solid acrylic plug is drilled for the ion chamber of choice. A bone equivalent plug is included for precise simulation of high dose gradients. Acrylic Phantom Slab is a solid acrylic slab to provide simulated patient build-up material. Four 2 mm steel balls are imbedded in the slab as reference markers for 3D orientation of film on TPS. Lung Phantom Slab is an acrylic slab with two cavities for simulated lung inserts, two cylindrical cavities for thimble ion chamber placement and a set of two cedar lung inserts for lung simulation. Dimensions: Height (6 slabs) Width (each slab) Length (each slab) Weight (6 slabs) Cavity Diameter 18.00 cm (7.09 in) 30.00 cm (11.81 in) 45.00 cm ( 17.72 in) 22.7 kg (50.0 lbs) 1.90cm (3/4")
ADDITIONAL OPTIONS MOSFET Diode/TLD Slab, SeeDOS Code No 70608, has 9 channels for MOSFET diodes or TLD chips, which can be placed at any point in a field for point dose measurements. The small channel size was designed not to adversely affect other measurements so this slab can also be used as a solid slab for increased patient thickness. MOSFET diodes are isotropic for dose measurements from any angle. Acrylic Phantom Slab, SeeDOS Code No 50062, is a solid slab to provide simulated patient build-up material. Four 2 mm steel balls are provided for use as reference markers for 3D orientation of film on TPS. Carrying Case, SeeDOS Code No 50064, has extendable handles and wheels for transport from room to room. Case also protects phantom during shipping.
Specifications are subject to change without notice.
Full Information on the use of this phantom for Dose Verification is available, please click here on the detailed pdf information sheet A summary of the steps involved is as follows: Dose Verification A. Create treatment plan based on patient scans. B. Configure the IMRT Phantom on the CT couch according to the anatomy to be treated. C. CT scan the phantom with the selected chamber in place. D. Import CT phantom scans into the treatment planning system. E. Transpose treatment plan onto CT phantom scans F. Place the phantom, with ion chamber, film, and diodes in place, on the accelerator treatment couch. G. Treat the phantom as the treatment plan indicates. H. Examine the output of the ion chamber (absolute dose), film (relative or fluence dose), MOSFET diodes (point dose) and compare them to the treatment plan.
Illustrations available, please click here on the detailed pdf information sheet, include the following:
Step A Coronal view of a patient scan from treatment planning computer that will be transposed onto the phantom scan. Step B Phantom positioned on the simulator couch ready to be scanned. Step C Scan the phantom. Step D Three view scan of the phantom in the treatment planning example. Step E The three view treatment plan is transposed onto the phantom scan. Step F Phantom on accelerator treatment couch ready for treatment. Step G Treat the phantom as if it was a patient. Step H Examine the output of the ion chamber. This table shows typical dose measurements from an ion chamber. In a similar manner point dose measurements from MOSFET diodes can be tabulated and examined.
Field Charge Total Charge Per Field 1 1.78 1.78 2 3.54 1.76 3 5.88 2.34 4 7.91 2.03 5 9.23 1.32
Examine the fluence dose Image of a film placed between acrylic slabs of the IMRT phantom
Step H Analysis of a vertical fluence dose profile of the measured film versus the calculated dose on the RTP. Step I Analysis of a horizontal fluence dose profile of the fluence dose profile of the measured film versus the calculated dose on the RTP.
For a pictorial listing of available Cable Connectors, please click here
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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