Intermittent Dynamic Imaging for Radiation Dose and Positioning Control
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Solution Overview
Problem
Existing dynamic imaging systems fail to manage the total exposure dose effectively, as they do not consider capturing still images before dynamic imaging, leading to uncontrolled cumulative radiation exposure.
Innovation Solution
A dynamic imaging system that operates in an intermittent imaging mode, alternating between still image and dynamic image captures, with a hardware processor controlling the radiation source and detector to adhere to predetermined imaging periods and suspension periods, ensuring the total number of frames is managed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If still image capturing is performed before dynamic imaging to check patient position, then positioning accuracy is improved, but total exposure dose increases
Solution Approach 1:
The system implements periodic action by alternating between still image capturing and dynamic imaging in structured sequences. Still images are captured at specific intervals (before dynamic imaging and during pauses) to check positioning, while dynamic imaging captures motion. This periodic pattern ensures positioning verification is performed systematically without continuous radiation exposure, managing the trade-off between positioning accuracy and total dose.
Solution Approach 2:
The system applies preliminary action by capturing still images before initiating dynamic imaging to verify patient positioning in advance. This allows positioning corrections to be made before the higher-dose dynamic imaging begins, ensuring accurate positioning is achieved while minimizing unnecessary radiation exposure during the actual dynamic capture.
2Duration of action of moving object
If multiple times of dynamic imaging are performed to continuously capture long-time moving images, then imaging duration is improved, but total exposure dose increases
Solution Approach 1:
The system structures multiple dynamic imaging sessions with periodic still image captures interspersed between them. This creates a pattern where dynamic imaging (higher dose) is separated by still image periods (lower dose), allowing extended total imaging duration while managing cumulative dose through rhythmic alternation between imaging modes.
Solution Approach 2:
The system divides continuous long-duration imaging into segmented sequences of dynamic imaging followed by pauses with still images. Each segment captures a portion of the required imaging duration, and by segmenting the overall process into manageable units with dose-managed intervals, the system achieves extended imaging while controlling total exposure.
3Object-affected harmful factors
If intermittent imaging mode is implemented to manage total exposure dose, then radiation safety is improved, but imaging complexity increases
Solution Approach 1:
The system implements a periodic imaging protocol with predefined patterns of still image and dynamic image capture. The hardware processor executes this periodic pattern automatically, alternating between imaging modes according to predetermined timing. This structured periodic approach simplifies dose management while maintaining systematic imaging coverage, balancing safety requirements with operational complexity.
Solution Approach 2:
The system incorporates feedback mechanisms where the hardware processor monitors imaging progress, frame counts, and dose accumulation in real-time. Based on this feedback, the system automatically adjusts the imaging sequence, determines when to switch between still and dynamic modes, and decides when to terminate the imaging session. This closed-loop control manages complexity by automating decision-making based on real-time system state.
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
The system allows for precise management of the total exposure dose by intermittently capturing still and dynamic images, ensuring compliance with radiation safety limits and maintaining consistent image quality.
Implementation Method 1
obtains a still image consisting of a single frame and a dynamic image consisting of multiple frames by irradiating a subject with radiation emitted by the radiation source and detecting the radiation transmitted through the subject by the radiation detector
Data Source
AI summary
A dynamic imaging system includes a radiation source, a radiation detector, and a hardware processor. The dynamic imaging system obtains a still image consisting of a single frame and a dynamic image consisting of multiple frames by irradiating a subject with radiation emitted by the radiation source and detecting the radiation transmitted through the subject by the radiation detector. The hardware processor controls the radiation source and the radiation detector to operate in an intermittent imaging mode in which the still image and/or the dynamic image are obtained multiple times during one session of imaging from one time of imaging start to one time of imaging end, based on a predetermined imaging period and a predetermined imaging suspension period. The hardware processor ends the one session of imaging, based on a total number of frames of the still image and the dynamic image.