Evaluation Background: Advanced Imaging CT Systems

October 27, 2023 | Evaluations & Guidance

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Here's background for our Evaluations of advanced imaging CT systems, outlining the key considerations for making wise purchasing decisions. Learn how the technology is used, which specs are important, and what factors we test for. Also review our latest product ratings and ECRI's data describing hospitals' interest in each vendor**.

Computed tomography (CT) is an x-ray imaging modality used for a variety of clinical applications. Advanced imaging CT scanners (which we formerly referred to as "premium" systems) are the most sophisticated class of CT scanners available and are used in both clinical and research settings. They offer the latest technologies for advanced applications, such as dynamic research studies, dual-energy acquisition, the latest dose reduction techniques, advanced workflow optimization tools, and cutting-edge reconstruction algorithms. These systems are typically used for advanced radiology and whole-organ assessment with the newest dose reduction technologies. They can be used for a broad range of clinical indications; in particular, the multi-energy capability allows for advanced imaging of the spine, head, gastrointestinal organs, and vascular structures; screening for cancers in soft tissues and heart disease characterization; rapid imaging of trauma patients; and imaging of musculoskeletal disorders (joint imaging).

Major components of a typical advanced imaging CT system include the following:

  1. The x-ray generator, which supplies high voltage to the x-ray tube. The x-ray generator is built into the CT gantry.

  2. The x-ray tube, which emits the x-rays while rotating around the patient.

  3. The detector, a curved array that rotates around the patient with the x-ray tube. Current detector development is able to detect more than one energy or perform on-board photon counting.

  4. The patient table, which positions the patient in the...

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