Features & Technical Specifications

The XTE system comprises two pallets: XTE-1 and XTE-2, loaded with instruments and material simulating shapes and compositions, including contraband and security threats, found in air, sea and land freight.

Designed to handle medium and large scanners ranging in energies between 120 keV and 2500 keV and beyond, the system is flexible and can be tuned to suit a single application as well as a range of X-ray and gamma transport security scanners.

With just one pass, a comprehensive set of 9 tests yields clarity over the following questions:
– How is my existing scanner performing on a day-to-day basis?
– How do I know the x-ray system performs to my specification?
– Will I be able to identify performance issues such as degradation of generators and detectors?
– Will I, in fact, be able to extend the shelf life of my x-ray scanners through regularly scheduled XTE calibration checks?
– Will XTE testing allow me to adhere more closely to my life-cycle cost programming?
– Will I be able to satisfy regulatory inspection requirements such as ANSI, ASTM, and ISO Quality Control?

TECHNICAL SPECIFICATIONS

Dimensions: XTE 950 – 1100mm x 950mm x 895mm or XTE 1100 – 1100mm x 1100mm x 895mm
Weight: XTE 1 (170kg-180kg) / XTE 2 (150kg-290kg) (dependent on model)

Usage: Forklift ready – no transport pallets required
Test plate angle adjustment: 360 degrees in two increments
Operation: The test plates are balanced and gear operated
Manufacturing compliance: ISO 9000, ISO 14001, BizSafe certification

XTE IMAGING TEST SPECIFICATIONS


The system comprises involves 9 separate tests and results in a comprehensive test report. Tests measure the performance of all medium to large x-ray units (with energy levels of at least 120keV in terms of 5 critical operational issues: spatial resolution, contrast sensitivity, x-ray penetration, point spread function and modular transfer function.

01

Image Resolution
Test 1 is an image resolution test. It is made up of nine wires bent into a zigzag pattern The wire diameters range from ø (diameter) 10 to ø1. The wires are placed behind a steel step wedge with seven steps, with the first portion of the wires in air. The steel steps are in increments of 10 mm each. The step wedge and air portion create eight subsections of this test. 

The test is scored by observing how many wires are visible for each thickness of steel and air.

02

Thickness Resolution: Delrin
Test 2 evaluates the thickness resolution of Delrin. It consists of a Delrin step wedge with steps that are 80mm, 40mm, 20mm, and 10mm thick. The portion of the step wedge used for this test sits in air. 

The test is scored by observing if each block can be clearly discriminated from its background.

03

Thickness Resolution: Polyethlene
Similar to Test 2, Test 3 evaluates the thickness resolution of polypropylene. It consists of a polypropylene step wedge with steps 80mm, 40mm, 20mm, and 10mm thick. The portion of the step wedge used for this test sits in air. 

The test is scored by observing if each block can be clearly discriminated from its background.

04

Contrast Sensitivity
Test 4 evaluates contrast sensitivity. The test consists of five steel bars ranging in thickness from 2.5mm to 20mm thick. The bars are placed behind a steel step wedge. There are seven steps in the wedge with 10mm increments for each step. 

The test is scored by observing how many sections of the bars are visible behind the step wedge.

05

Materials Discrimination
Test 5 evaluates materials discrimination of polypropylene and Delrin. It uses portions of the same step wedges used for Tests 2 and 3. The test consists of small regions where the polypropylene and Delrin step wedges intersect, thus creating a set of boxes when imaged. 

The test is scored by observing how many regions in the box pattern can be clearly discriminated from its background.

06

Spatial resolution: Perspex
This test evaluates spatial resolution through Perspex (also called Plexiglas). The test consists of sets of three bars, there are three different thicknesses of bar, and the sets are arranged in three different orientations. There are nine different groups of wires. 

The test is scored by observing how many wire groups are clearly resolved without distortion.

07

Spatial resolution: Steel
This test evaluates the spatial resolution through steel. The test consists of the same wire groupings as in Test 1 arranged on increasing thicknesses of steel; there are three different thicknesses of steel on which the tests are mounted. The steel increases in thickness using 10mm steps. 

The test is scored by observing how many wire groups are clearly resolved.

08

Thickness Resolution
This test evaluates the thickness resolution and materials discrimination of materials with different effective atomic numbers (Zeff). This test consists of vertical step wedges of polypropylene Perspex, Delrin, Teflon (i.e., Polytetrafluoroethylene), and aluminium arranged in decreasing Zeff values. Each wedge consists of three steps that decrease in thickness from 60mm down to 15mm. This arrangement creates a set of rectangles when imaged.

The test is scored by observing how many rectangles are clearly discriminated from its background.

09

Steel Penetration
This test evaluates X-ray penetration through steel. It consists of a kite shaped plate of steel behind five different thicknesses (i.e., steps) of steel. There is a block of steel 100mm thick (comprised of 20 plates of 5mm of steel each) on one side of the test piece. On the other side is a step wedge consisting of five steps with each step consisting of five 5mm steel plates (totalling 25mm of steel per step), over which the kite shape is placed.  

The test is scored by observing through how many of the steel plates the kite shape can be observed.