EOD technicians and security teams don’t get to choose where a suspicious object is placed. It may be found on pavement, under a seat, or against a wall. Each position affects where the detector can go and how much of the object the image can show.
A low-edge detector places the active imaging area close to the edge of its housing, helping reduce the un-imaged margin near a supporting surface. A spectral detector adds information about material differences within the object. Together, these capabilities address two field challenges: limited detector placement and complex image interpretation.
Here are five field scenarios where having a low-edge spectral detector can matter most.
Scenario #1: Suspicious Devices Positioned on the Ground
Many suspicious objects are found where someone sets them down on a sidewalk, in a parking lot, or on a floor. The detector stands upright behind the object, with its bottom edge on the ground.
With a wide border, the lowest part of the object falls below the active area that can be captured. That is often where details matter most, such as components at the base of a bag or box. Capturing this might mean disturbing the object, which teams work hard to avoid.
A low-edge detector can place its active area near ground level, and spectral views can add material information about what sits there.
Scenario #2: Objects Against a Wall Inside Containers or Vehicles
In a trunk, a footwell, a crate, or a shipping container, the detector often has to sit against a floor or wall. Objects tend to rest against those same surfaces, surrounded by other items. A low-edge design can reduce the margin outside the image along the adjacent surface.
In a grayscale image, tools, wiring, and everyday items can overlap into one dense, indiscernible shape. Spectral views can help separate lower-Z materials from metals, giving the operator more to work with.
Scenario #3: Restricted or Low-Clearance Environments
Some objects sit in cramped spaces, like under a vehicle, beneath bleachers, behind pipes, with little room for EOD teams to do their work. The detector may need to slide in at a low angle or be placed by a robot.
In these tight spaces, every millimeter of usable imaging area counts. In that position, a smaller inactive border can help bring more of the region of interest into view. Overall detector dimensions and housing thickness determine whether the panel can fit in the available space. The low edge affects how close the image can reach to the housing boundary.
Scenario #4: Time-Sensitive Threat Assessment
An unattended bag at a venue or airport is time-sensitive, creating pressure to decide. A typical response moves from the report, to deploying the bomb squad, to imaging and assessment, to a decision whether to neutralize, investigate further, or clear.
If the low edge brings the feature into view on the initial placement, it may reduce the need to reposition the detector for that area. Single-exposure spectral imaging gives the operator several views from the same exposure to support the assessment.
Scenario #5: Multi-Object Along a Shared Surface
Several bags resting along the same floor or shelf can present a recurring coverage problem. If their bases sit near the image boundary, the inactive detector border can leave a similar portion of each object outside the image.
A low edge can help capture more of those regions. When reviewing images from several objects, a consistent spectral color scale can help operators compare material groupings and flag features for closer review. Different materials can share a color band, so operators interpret color alongside the grayscale image and other available information.
Reveal™ RT Combines Low-Edge Coverage with Single-Exposure Spectral X-ray
Reveal™ RT is a rugged, portable X-ray detector for EOD, security, and defense teams. Its low-edge design brings the active imaging area close to the housing edge, helping capture features near a floor or wall when detector placement is limited. SpectralDR® technology then provides multiple views from a single exposure to help operators distinguish material groups within the image.
- Low-profile edge under 5 mm on two sides, so the active area can sit close to the ground or a wall.
- Single-exposure spectral imaging using a patented triple-layer detector developed by our team, as described by our CTO Karim and Tilley, captures multiple energy measurements without motion artifacts between exposures.
- Up to four images per exposure: regular, low-Z subtracted, high-Z subtracted, and a color composite following ASTM F792-17, the standard used by TSA.
- Color classification: orange for organic (low Z), green for intermediate Z, and blue for metal (high Z).
- Field-ready build with outdoor IP-rated protection, drop protection, and an impact rating.
- Flexible deployment: wired or wireless, with packages available that include pulsed or continuous-potential X-ray sources.
Reveal RT is a part of KA’s Reveal product line. Other technologies included our standard Reveal™ 35C, and the ruggedized version, Reveal™ R 35C.
Conclusion
Suspicious objects do not always sit where imaging is easy. On the ground, inside a vehicle, or in a tight space, the detector’s edge can decide how much of the object the image includes. Spectral imaging then adds material information to that image. Together, they can help operators get more useful information from each placement and each exposure. As always, the decision-making stays with the trained operator.
To learn more, explore KA Imaging’s EOD and security imaging solutions or talk with KA Imaging.
Frequently Asked Questions
What is a low-edge spectral detector?
A low-edge spectral detector is a detector whose active imaging area runs very close to the housing edge, and which also records X-ray information in more than one energy range. The low edge helps image objects on the ground or against a wall. The spectral data adds material information.
Why does the detector edge matter?
Most flat-panel detectors have a border between the housing edge and the active area. When the detector stands on the ground, that border becomes a strip near the base of the object that the image does not capture. A low edge makes that strip much smaller, meaning more can be captured at the edges.
What does spectral imaging add to a low-edge X-ray detector?
Materials absorb X-rays differently at different energies, depending on their effective atomic number (Zeff). Spectral imaging uses that difference to help separate lower-Z materials (ex: organics) from higher-Z materials (ex: metals).
Learn more about effective atomic number differentiation.
Does a spectral image identify explosives?
A spectral X-ray image can help operators distinguish material groups. Different substances can fall into the same color band, so operators use that information alongside the grayscale image and other assessment findings. A color alone cannot establish that a substance is explosive.
What is ASTM F792-17?
ASTM F792-17 is a standard practice for evaluating the imaging performance of security X-ray systems, including how well they classify materials.