Streamlining X-ray QA: a closer look at RTI’s Cobia meter

Quality assurance in diagnostic imaging has always been a balance between precision and practicality. As equipment grows more complex and testing requirements evolve, there’s a growing need for QA tools that are both comprehensive and easy to use. RTI’s Cobia meter platform is one example of how this balance can be achieved in routine X-ray QA.

Meeting everyday QA demands with simplicity and flexibility

Cobia is a family of handheld meters developed for quick and efficient testing of X-ray systems. Each model within the platform is tailored for specific modalities – ranging from general radiographic and fluoroscopic systems to intraoral and CBCT dental units. Rather than adopting a one-size-fits-all model, the platform allows users to select the version that fits their specific needs.
This modular approach offers flexibility without overwhelming the user with features they may never require. It also simplifies training and reduces time spent on configuration, particularly beneficial in settings where QA personnel are managing a wide variety of equipment.

User-centric design in clinical environments

One of the more practical aspects of the Cobia platform is its rotatable colour display. In many clinical environments, where space is limited and visibility is not always ideal, this design feature allows measurement results to be read clearly, even when the meter is placed at awkward angles or upside down.

The interface supports a range of languages, including Chinese, French, German, Japanese, Norwegian, Russian, Spanish, Swedish, and Turkish. This multilingual support makes the device accessible in diverse clinical settings and has been particularly useful in international service operations and training contexts.

Simplifying Dental X-ray QA

The Cobia DENTAL model has been developed specifically for intraoral and CBCT system testing. It is widely used in routine inspections and quality control procedures in dental clinics, often by non-specialist staff. With minimal setup and no need for manual calibration before each use, it supports quick testing workflows while still offering reliable data.

A recent upgrade introduced an external detector input, enabling additional measurements such as DAP, mAs, CTDI, and light output. This broadens its applicability and allows for more detailed assessments when needed, all while maintaining ease of use.

Tools for trend monitoring and equipment stability

For more traditional radiographic and fluoroscopic equipment, models like the Cobia SMART R/F and Cobia FLEX R/F provide options suited to different levels of testing complexity. The SMART version is designed for quick output checks, particularly useful for verifying stability in parameters like dose and kVp over time. The FLEX model adds support for external probes and ion chambers, offering more flexibility for advanced QA programs.

Both models include key measurements such as dose, dose rate, exposure time, total filtration, HVL, and kVp, parameters essential to both routine monitoring and in-depth evaluations.

Field Experience and Integration with Reporting Tools

Field reports consistently highlight the meter’s usability and efficiency. Many users note the reduced time spent on measurements and documentation, particularly when integrated with RTI’s Ocean Next™ software. While Ocean is not required to operate the device, its compatibility supports streamlined data collection and report generation. In one example, a user noted that automation and centralized data management reduced their administrative burden by over 90%, freeing up time for other clinical and QA tasks.

Continued Development and Market Presence

Cobia has been widely adopted across various healthcare systems, with RTI reporting consistent performance in key global markets. To maintain its relevance in an increasingly digital QA environment, the meter receives regular updates. Most recently, its display interface was redesigned to enhance readability and usability. While the update does not introduce new features or functionalities, it ensures compatibility with future developments.

As the landscape of diagnostic imaging continues to evolve, tools like Cobia illustrate how thoughtful design can support accuracy and efficiency without overcomplicating the QA process. While no single meter can address all needs, the Cobia platform demonstrates how modularity and user experience can come together in practical, clinically-relevant ways.

 

Michael Olding, PhD, is Head of Product Management at RTI Group. Michael works on the interface between product development at RTI and global end users of RTI’s products & solutions (physicists, engineers and medical professionals), and is passionate about ensuring user needs are at the forefront of new product development at RTI Group.

Published in EFOMP News, Issue 02/2025/Summer, page 39-41