SedentexCT IQ dental cone beam CT phantom

SedentexCT IQ dental cone beam CT phantom

Product introduction

SedentexCT IQMotifby britishLeeds Test ObjectsThe company produces, for cone beamCT(CBCT)Special performance indicator detection phantom. The shape of the model is the diameter160mmcylinder, background material made of polymethylmethacrylate(PMMA)Composition, density is1.20 +/- 1.00% g/cm3, with a groove that holds the detection insert.

SedentexCT IQMotifHave7chambers, respectivelyA, B, C, D, E, F, Glogo, each chamber is filled with six cylindrical modules that can be freely disassembled and assembled.

SedentexCT IQMotifAccording to the testing purpose, different performance testing modules are designed, as follows: 

1) line extension function module(LSF)：for polytetrafluoroethylene(PTFE)and polymethylmethacrylate(PMMA)Cylindrical test module composed ofPTFEandPMMAOccupying the left and right sides of the cylinder respectively, the intersection line of the two materials is used to test the system line expansion function.

2) point extension function module(PSF)：Contains a diameter25 mmstainless steel wire, which is suspended in the air cylindrical cavity and used to test the system point spread function

3)Horizontal spatial resolution test module(X&Y axes Spatial Resolution)：It is a wire pair block of aluminum and polymer alternately superimposed. The wire pair design specifications are respectively0, 1.7, 2.0, 2.5, 2.8, 4.0and 5.0 LP/mm

4)Vertical spatial resolution test module(Z axis Spatial Resolution)：It is a line pair block of aluminum and polymer alternately superimposed, and the line pair edgeZArranged and distributed in the axial direction, the line pair design specifications are:0, 1.7, 2.0, 2.5, 2.8, 4.0and 5.0 LP/mm

5)Contrast resolution test module(Contrast Resolution)：contains5cylinder test modules, each test module is composed of embeddedPMMAof5different diameters(The diameters are0, 2.0, 3.0, 4.0, 5.0)The target substances are composed of aluminum and polytetrafluoroethylene.(PTFE),polyoxymethylene resin(delrin), low density polypropylene(LDPE)and air

Target substance plug-in image:

[Upper left: low density polypropylene(LDPE); Upper right: air; Lower left: aluminum; Middle lower: PTFE(PTFE);polyoxymethylene resin(delrin)]

(Upper left: air; upper middle: aluminum; upper right:HA 50;Bottom left:HA 100;Bottom right:HA 200)

6) gray value orCTNumerical Linear Test Module(Pixel intensity)：Made of polytetrafluoroethylene arranged vertically(PTEF),polyoxymethylene resin(Delrin), low density polyethylene(LDPE), aluminum, and air cylinders. The diameters of these cylinders are10 mm. This phantom is also used to test contrast-to-noise ratio

(Upper left: air; upper middle: aluminum; upper right:HA 50;Bottom left:HA 100;Bottom right:HA 200) 

7) Hardening Artifact and Metal Artifact Test Module(Beam Hardening Artefacts)：Contains two cylinder test modules, one of which has three rods with a diameter of5 mmtitanium rod, and three rods with a diameter of5 mmlead rod

8)Other cylindrical phantoms are made from background materialsPMMAUniform composition

SedentexCT IQ dental cone beamCTMotif

Comparative noise ratio test:

(Left: axial view; right: coronal view)

Geometric accuracy test:

Image quality test:

(Upper left: point spread function(PSF);Top right: line expansion function(LSF); Lower left: spatial resolution; Lower right: artifacts)

Geometric accuracy test hole mold:

Noise and Uniformity Test(PMMAarea)：

SedentexCT Swift/RadiaAutomatic counting software

Automatic scoring software for the SedentexCT IQ phantom

The software includes the following tools:

Select tool - Select and evaluate target substances for embedding

Zoom tool - Zoom the screen image

measuring tools - Measure the distance between two points(unit: mm)

window tools - Adjust brightness and contrast