Features and Benefits
ABSOLUTE DOSE
Make absolute measurements of dose at various depths in up to 16
positions throughout the phantom with standard thimble ion chambers.
RELATIVE DOSE
Make relative dose (fluence dose) measurements using ready pack or
radiochromic film placed every 3 cm. Easily compare film to TPS in 3D
using four reference marker points in acrylic Phantom Slab.Reference
marker points facilitate orientation of film,digital reconstruction and
transfer of multiple coronal film views to 3D sagital and transverse
images.
POINT DOSE
Make point dose measurements in any position in the phantom using
MOSFET diodes or TLDs.Point dose measurements are critical when
evaluating dose to sensitive structures.
SIMULTANEOUS MEASUREMENT
Make all three dose measurements simultaneously with one set up and
one treatment,saving time. Coronal film placement allows simultaneous ion chamber
and film
use since the planes are parallel.
TREATMENT PLANNING INTERFACE
Interfaces with treatment planning systems as the TPS recognizes the
phantom fiducial system and anthropomorphic shape.
BONE EQUIVALENT PLUG
Simulates bone for realistic TPS evaluation.Assists with measuring the absolute dose
at
isocenter near the spine.
ANTHROPOMORPHIC SHAPE
Anthropomorphic design provides intuitive,easy set-up for fast confirmation of
treatment plan.
Bone and lung insert fields provide high gradient tissue interfaces to evaluate TPS s
ability to manage these interfaces.
Uncovers edge effect issues related to tissue heterogeneity.
Accuracy of the prescribed dose is evaluated and confirmed in simulated
patient conditions in the body,excluding extremities.
Effectively evaluates junctioning issues of upper neck and half beam block superclav
fields.
FAST SET UP
Unique,versatile design allows many configurations to simulate individual treatment
plans.
Quick,easy,intuitive set-up.Complete a prostate dose set up and verification in as
little as 15 minutes.
Easily configure and adjust layered phantom slabs for individual 3D patient
simulation.
Fine 1 mm scribed black lines for easy laser alignment positioning of phantom.
TRANSPARENT ACRYLIC CONSTRUCTION
Operator can visualize the placement of film,chambers and diodes for accurate
measurements,
thus minimizingregistration errors. Acrylic is characterized in TG 21 for acrylic to water
conversion for high
energy photon and electron beams. Water equivalent phantoms are not
characterized in this protocol.Some
water equivalent phantoms may only be characterized for cobalt to ascertain their
equivalence to liquid water.Since
exacting measurements are essential when dealing with the small field sizes in
IMRT,it is important to know the
equivalent properties to liquid water that the TG 21 acrylic to water conversion
provides.
For absolute dosimetry,apply correction factors for acrylic to water which are
published in the TG 21 protocol.
Standard Imaging combines the required corrections into one table based on depth
and energy,allowing the
application of only one correction factor.
REF 91230 IMRT Dose Verification Phantom,includes:
| 2
|
Chamber Phantom Slabs with 6 cavities each for ion chamber
placement
|
| 2
|
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 ion chamber of your choice
|
| 1
|
Bone Equivalent Plug
|
| 1
|
Lung Equivalent Set with four (4)inserts for lung phantom voids
|
Phantom Overview
Chamber Phantom Slab has six cavities for thimble ion chamber
measurement.
The diameter of each cavity is� �.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 bone simulation of heterogeneity
measurements.
Acrylic Phantom Slab is a solid 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 has 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.
Additional Options
MOSFET Diode/TLD Slab,REF 70608,has nine 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 perturb 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,REF 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,REF 50064,has extendable handles and wheels for transport from
room to room. Case also
protects phantom during shipping.
Doc. No. 1194-00 02-15-02
