IMRT Phantom Head and Neck - Nuclear Associates Model 74-001

Radiation Therapy

IMRT Phantom

Head and Neck

Nuclear Associates Model 74-001

• Verify heterogeneity corrections

• Correlate CTU to electron density

• Check dose distributions in

sensitive areas

• Check depth doses and absolute

dose

• 2-D and 3-D isodoses

• Verify individual patient treatment

plans

• Calibrate film with ion chamber

Complete QA from CT imaging to dose verification

Introduction

The Model 74-001 IMRT phantom is designed to address the complex issues surrounding commissioning and comparison of treatment

planning systems and verification of individual patient plans and delivery.

The phantom is circular in shape, approximates the size of an average patient, and is manufactured from unique proprietary materials

that faithfully mimic bone and water within 1% from 50 keV to 25 MeV. This enables thorough analysis of both the treatment planning

and delivery systems.

Tissue equivalent interchangeable rod inserts for ionization chambers allow for point dose measurements in multiple planes in the

phantom and film calibration. The phantom also supports film dosimetry with not only standard radiographic films but also GAFCHROMIC ®

media. Optional inserts are available to support a variety of other detectors including TLD’s, MOSFET, and diodes.

The Model 74-001 accommodates one Ready Pack™ 10 x 12 inch film in transverse orientation, two radiochromic or radiographic

10 x 10 cm films in transverse orientation and/or a stack of thirteen radiochromic films pre-cut to 63.5 x 63.5 mm* in three different

orientations.

The Model 74-001 includes five different Electron Density reference plugs that can be interchanged in five separate locations within

the phantom. The surface of the phantom is etched with grooves to ensure proper orientation of the CT slices and accurate film to plan

registration. An optional cranial bone ring is also available.

* GAFCHROMIC MD-22 Therapy Dosimetry Media (Model 37-041-2525), package of twenty 2.5 x 2.5 inch octagonal shaped sheets.

Specifications Head and Neck (Model 74-001)

1 - Film stack or gel cassette

4 - Cavity slab

2 - Fiducial markers

5 - 1 and 2 cm spacers for film stack positioning

3 - Two 1 cm slabs for film dosimetry

6 - 2 and 3 cm spacer slabs

Head and Neck includes

Qty

Model Description

Qty

Model Description

1

Water Equivalent Homogeneous Section drilled to

accommodate rod inserts, 15 cm thick

1

74-020

Bone Equivalent Rod Insert with Ion Chamber

Cavity, 15 cm long

1 Cavity Slab to accommodate Film Stack or Gel

Cassette, 6.4 cm

1

74-024

Water Equivalent Rod Insert with Ion Chamber

Cavity, 15 cm long

2

Film Slabs, 1 cm, Film Cavity 10 x 10 cm

2

End Slabs

1

74-013

Film Stack for Small Volume 3-D Image

Reconstruction

5

Water Equivalent Rod Inserts, 15 cm long

2

74-015

CT to Film Fiducial Markers in Film Slabs

1

Bone Equivalent Rod Insert, 15 cm long

2

Spacer Slabs, 1 cm

1

74-010

Alignment Device

1

Spacer Slab, s cm

1

74-016

Holding Device

Specifications (continued)

Available model(s)

Rod with ion chamber cavities

Rods with chamber cavities are included with each phantom. See specific

phantom description for details. The rods are 1 inch in diameter and are

15 cm long. They are available in water, bone, or lung equivalent material.

Should your chamber not be listed below, contact Syncor Radiation

Management Customer Service for assistance.

When ordering, specify part number and cavity code.

Model

Description

74-001

IMRT Phantom - Head and Neck

Optional accessories

Example: 74-024-501

Model

Description

Cavity

code

Accommodates

Water Equivalent Rod Inserts (5 cm) for TLD's

(set of 5)

74-011

501

0.6 cm 3 Farmer-type Chambers without buildup cap,

PTW, Nuclear Enterprise (NE), Victoreen 580-006-WP

74-014

Gel Dosimetry Cassette

0.6 cm 3 Farmer-type chambers with buildup cap, PTW,

Nuclear Enterprise (NE)

502

Electron Density Reference Plugs

(set of 4: lung, bone, muscle, adipose)

74-028

506

Capintec PR-06G with buildup cap

507

Capintec PR-06C without buildup cap

511A

Nuclear Enterprise (NE) 2533 without buildup cap

Electron density reference inserts

511B

PTW N31003 0.3 cm 3 without buildup cap

Density

Electron density

per cc x 10 23

Electron density

relative to H 2 O

511C

PTW N31002 0.125 cm 3 without buildup cap

513

Exradin A-12

H 2 0

1.00

3.34

1.000

Lung

0.21

0.69

0.207

515

Exradin T-14 Microchamber

Bone

1.60

5.03

1.506

517

0.2 cm 3 Farmer-type Chamber without buildup cap

Muscle

1.06

3.48

1.042

518

PTW 31006 without buildup cap

Adipose

0.96

3.17

0.949

520

PTW 23331 without buildup cap

Plastic Water ® -

diagnostic/

therapy range

521

Wellhöfer IC3

1.04

3.35

1.003

522

Nuclear Enterprise (NE) 2611A without buildup cap

523

Victoreen 550-6A Ion Chamber with buildup cap (X-10)

524

Victoreen 550-6A Ion Chamber without buildup cap

525

Wellhöfer IC15 Ion Chamber without buildup cap

526

Capintec PR-06G without buildup cap

527

Wellhöfer IC70 with buildup cap

528

Exradin 14SL

531

Exradin 1SL

532

Wellhöfer CC13/IC10

533

Wellhöfer CC01