Workflow Step

There are a multitude of CT imaging systems, spanning the diagnostic and radiation therapy spaces. This breadth has been a challenge for QA because of the different performance characteristics of these systems. With IQphan, a single phantom addresses QA across the range of specifications of different CT scanners,enabling you to gain more QA information than may be available with other phantoms.


Comprehensive Image Quality Phantom

With IQphan, users can perform QA across CT imaging systems, from sophisticated diagnostic scanners to cone beam to on-board radiotherapy systems. A combination of modules supports a robust variety of tests.

Automated Analysis

Use IQphan with RapidCHECK™ Image Quality Analysis software for exacting CT imaging quality testing, with quick, consistent analysis.


High-Contrast Resolution Module

Designed for manual and automated analysis, this module features high-resolution line pairs, large 3D patterns that are easy to visualize, and robust data analysis in the RapidCHECK software.

  • All line pair targets oriented 45° to radial line for a consistent balance between radial and circumferential resolution
  • Includes high resolutions up to 22 lp/cm
  • Designed for automation: Includes solid samples of resolution materials for accurate results during software analysis¹
  • Zinc high-contrast material provides visibility without over-ranging scanners

Slice Sensitivity & Geometric Evaluation Module

Multiple wire-ramp materials and diameters enable this module to analyze slice thickness on scanners ranging from diagnostic CT to CBCT and MVCT.

  • Measure slice thickness with two opposed pairs of wire ramps, one pair thinner and one pair thicker
  • Enables Modulation Transfer Function with one-off vertical wire
  • Check geometric accuracy with a set of 8 acrylic spheres
  • Perform MTF measurements with BB’s of two different sizes
  • Robust across a wide range of CT systems, from diagnostic to RT

Low-Contrast Detectability Module

Finally, a low-contrast test that works for radiation therapy systems as well as diagnostic CT. Challenge your high-end systems with 0.3% and 0.6% contrasts. Test your radiation therapy CT systems with body-like contrasts of 1.0% and 2.0%, in sizes ranging from 2.0 to 25.0 mm.

  • Evaluate Low Contrast Detectability at four different contrast levels: 0.3%, 0.6%, 1.0%, and 2.0% (3 HU, 6 HU, 10 HU, and 20 HU)
  • Sizes of each contrast object range from 2 to 25 mm
  • Low-Z density-based contrasts
  • The four precisely formulated contrast levels use density variations of low-Z materials for consistency across CT energies

Uniformity Module

Assess noise and uniformity in our HE CT Solid Water material.

  • Measure uniformity and noise
  • Constructed of HE CT Solid Water for unparalleled water equivalency across the energy spectrum

HU Module

Test the consistency of known HU materials and measure the effective energy of the scan.

  • 12 material samples
  • Materials include Tissue-Mimicking Materials (TMMs) as well as commonly referenced plastics
  • Bone is not just dense plastic; TMMs include higher-Z materials that can improve calibrations and effective energy measurements

IQPHAN

IQphan can mount on the case, either atop the couch or over-hanging the front of the couch


Resources


Specifications

High-Contrast Resolution Module Specifications

Material

HE CT Solid Water®

Diameter

20.0 cm (7.9 in)

Length

A 4.0 cm (1.57 in) measurement region plus 2.0 cm on the end for mounting and scatter equilibrium

Resolution Pattern Size

1.5 cm x 1.0 cm x 4.0 cm

Resolutions Tested

2,4,5,6,7,8,9,10,12,14,16,18,20,22 lp/cm

Automated Analysis

Solid material samples improve computational analysis

Features

Large 3D pattern sizes enable robust evaluation

Contrast Material

Zinc

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Slice Sensitivity & Geometric Evaluation Module Specifications

Material

HE CT Solid Water®

Diameter

20.0 cm (7.9 in)

Wire Ramps

2x Tungsten wire, 0.15 mm diameter, and 2x Stainless Steel wire, 0.635 mm diameter

MTF BB’s

0.18 mm and 0.28 mm

MTF Wire

Tungsten wire, 5 degrees off-vertical, 0.05 mm diameter

Acrylic Spheres

1.0, 1.5, 2.0, 3.0, 4.0, 6.0, 8.0, and 10.0 mm diameter

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Low-Contrast Detectability Module Specifications

Material

Epoxy interior, with a shell of our new HE CT Solid Water®

Diameter

20.0 cm (7.9 in)

Length

4.0 cm (1.57 in)

Contrast Levels

0.3% (3HU), 0.6% (6HU), 1.0% (10HU), 2.0% (20 HU)

Sizes at Each Contrast

2, 3, 4, 5, 7, 9, 12, 15, and 25 mm

Sub-slice Contrasts

2, 3, 5, 7, and 10 mm (cylinder diameter and length), at each contrast level

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Uniformity Module Specifications

Material

HE CT Solid Water®

Diameter

20.0 cm (7.9 in)

Length

4.0 cm (1.57in)

HU Module Specifications

Base Material

HE CT Solid Water®

Diameter

20.0 cm (7.9 in)

Length

4.0 cm (1.57in)

Insert Materials

2x HE CT Solid Water, HE Inner Bone, HE Cortical Bone, Acrylic, Polystyrene, LDPE, PMP, Teflon, Delrin, 2x Air