Real-Time Radiography (RTR)
Real-Time Radiography uses image-intensifier tubes or flat-panel detectors to display a live X-ray video of a component, allowing dynamic inspection of moving parts, fluid flow, or operator-positioned objects.
Definition
Real-Time Radiography (RTR) produces a continuously updating X-ray image at video frame rates. The component or X-ray source can be moved while the operator watches the live image, dramatically increasing throughput for repetitive parts and enabling dynamic studies of valves, castings, and assemblies.
Technical Context
Modern RTR systems use flat-panel detectors with frame rates of 15–30 fps and image-processing software that integrates multiple frames to improve SNR.
When It Is Used
- Castings inspection (automotive, aerospace)
- Electronic component inspection (BGA, solder joints)
- Security and customs screening
How it works
Radiographic imaging viewed as it happens, using an image intensifier or digital detector, so the part can be manipulated under the beam and observed from changing angles rather than captured in a single fixed exposure.
What it finds
Volumetric flaws, and — uniquely — behaviour: parts can be rotated to bring a suspected planar flaw into a favourable orientation, and moving components can be observed under the beam.
What it will not find
Fine detail, historically, because intensifier resolution trailed film. Modern detectors have narrowed that gap considerably, but the trade of sensitivity against speed remains real.
How it is actually done
Used heavily for castings and for high-throughput production where the ability to reorient the part interactively is worth more than ultimate sensitivity.
Governing codes and standards
ASME Section V Article 2; ASTM E1000 as the standard guide for radioscopy.
Where it goes wrong
Assuming the live image has the same sensitivity as a radiograph of the same part. The IQI requirement applies to radioscopic examination too, and it is the only honest check.
Where Real-Time Radiography fits in an inspection programme
A term is only useful when it connects to a decision. Real-Time Radiography appears in written procedures, in technique sheets, and in the records an owner or accreditation body reviews afterwards — which means the way it is defined in your documentation has to match the way it is applied on site. Where the two drift apart, audits find it. Atlantis writes and reviews procedures against the governing codes, trains inspection personnel to apply them, and builds the record-keeping that makes the evidence retrievable years later. Procedure development and code consulting · NDT training and certification · Ask us about your programme.
Related terms
- Radiographic Testing (RT) — Radiographic Testing (RT) is an NDT method that uses X-rays or gamma rays to create a permanent image of the internal structure of a component on film or a digital detector, revealing porosity, cracks, inclusions, and other volumetric defects.
- Digital Radiography (DR) — Digital Radiography uses a flat-panel detector (amorphous silicon or amorphous selenium) to capture an X-ray image directly in digital form in real time, with higher signal-to-noise ratio and faster cycle time than CR or film.
More method terms
Ultrasonic Testing · Magnetic Particle Testing · Penetrant Testing · Eddy Current Testing · Visual Testing · Acoustic Emission Testing · Leak Testing · Thermography / Infrared Testing · Microwave Testing · Phased Array Ultrasonic Testing
Where this comes up in practice
Terms like this one appear in three places that matter commercially: the written practice that governs how your personnel are qualified, the procedures and technique sheets that define how an examination is actually performed, and the evidence an auditor or client asks for when they want to know why an inspection was accepted. Getting the terminology right is the easy part; being able to produce the qualification record, the calibration traceability and the procedure revision that applied on the day of the inspection is the part that decides audits.
Atlantis NDT provides NDT training and certification against ASNT SNT-TC-1A and ISO 9712, ASNT Level III consulting for written practices and procedure approval, inspection management software that holds qualification, calibration and procedure-revision evidence in recoverable form, and an asset integrity platform that binds inspection results to the asset they describe. Browse the full NDT glossary or ask a Level III directly.