Spectral CT Controller for Familiar kVp Workflow Mapping
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Solution Overview
Problem
Operators experienced with conventional non-spectral CT scanners face difficulties in operating spectral CT scanners due to their complex operation, leading to potential errors and diminished clinical outcomes.
Innovation Solution
A controller that converts user-defined non-spectral CT scanner settings into equivalent spectral CT scanner settings to deliver the same X-ray dosage, allowing operators to perform spectral CT scans with familiar parameters and achieve similar image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If spectral CT scanning is performed with multiple kVp switching cycles, then spectral imaging capability is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The controller creates a virtual copy of conventional CT operating parameters and automatically maps them to spectral CT parameters. This allows operators to use familiar conventional CT settings while the system handles the complexity of spectral acquisition, effectively copying the simplicity of conventional operation into the spectral domain.
Solution Approach 2:
The controller acts as an intermediary layer between the operator and the complex spectral CT system. It translates simple operator inputs into the complex multi-parameter spectral acquisition sequences, shielding the operator from complexity while enabling advanced spectral imaging capabilities.
2Adaptability or versatility
If spectral CT scanning is performed with multiple kVp switching cycles, then spectral imaging capability is improved, but ease of operation worsens
Solution Approach 1:
The controller creates a virtual copy of conventional CT operating parameters and automatically maps them to spectral CT parameters. This allows operators to use familiar conventional CT settings while the system handles the complexity of spectral acquisition, effectively copying the simplicity of conventional operation into the spectral domain.
Solution Approach 2:
The system performs self-service by automatically determining optimal spectral acquisition parameters based on the operator's simple input. The controller autonomously configures the complex multi-kVp switching sequences without requiring operator expertise in spectral imaging parameters, making the system as easy to operate as conventional CT.
3Ease of operation
If conventional CT parameters are used directly on spectral CT scanner, then operational familiarity is maintained, but X-ray dosage and image quality may differ
Solution Approach 1:
The controller automatically adjusts spectral CT parameters based on the conventional CT settings provided by the operator. It transforms the conventional parameters into equivalent spectral parameters that maintain the same diagnostic information content, ensuring consistent image quality and appropriate X-ray dosing while preserving operational familiarity.
Solution Approach 2:
The system incorporates feedback mechanisms where the controller continuously monitors the relationship between conventional and spectral parameters, automatically adjusting spectral acquisition settings to match the diagnostic requirements of the original conventional CT protocol, thereby ensuring consistent image quality across different scanning modes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables operators to acquire spectral CT scan data with familiar settings, ensuring equivalent X-ray dosage and image quality, thus simplifying the operation of spectral CT scanners for conventional CT scanner users.
Implementation Method 1
The X-ray generator rotates around an examination region located between the X-ray generator and the one or more detectors and emits (typically polychromatic) radiation
Implementation Method 2
The one or more detectors detect radiation that traverses the examination region and generate a signal (or projection data) indicative of the examination region and the subject and/or object disposed therein
Implementation Method 3
One of the methods for performing spectral imaging is kVp switching, in which a tube voltage is cyclically switched between or through at least two different tube voltages
Data Source
AI summary
A controller and method are for configuring operation of a kVp-s witching spectral CT imaging apparatus which, in at least one mode, aims to mimic the user-side operating workflow of a conventional non-spectral CT scanner. The controller receives user-defined settings associated with operation of a non-spectral CT system, comprising a desired peak tube voltage and desired tube current. Based on these user-specified inputs, the controller performs a conversion procedure to derive a set of spectral CT operating parameters which are estimated to result in administration of the same dose of X-ray radiation over a single kVp switching cycle as would be administered by the conventional scanner over a same time duration. Thus, the user can acquire CT projection and image data using a spectral CT scanner, without a need to change their own operating workflow, and furthermore in a way that will administer the same radiographic density as they would expect to achieve with the same user-specified settings on a conventional scanner.