Radiation Imaging Apparatus Time Synchronization via Priority Segmentation

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Solution Overview

Problem

Existing radiation imaging systems face a time lag between the radiation source control apparatus and the radiation imaging apparatus due to overlapping communication for time synchronization and image transfer, leading to potential exposure errors, especially in medical applications where precise timing is crucial.

Innovation Solution

A radiation imaging apparatus with a time count control unit that generates a synchronization control message with priority over image data transmission, ensuring accurate synchronization between the radiation imaging apparatus and the radiation source control apparatus by managing time and adjusting for propagation delays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If communication for time synchronization and image transfer use the same network simultaneously, then device complexity is reduced, but time synchronization precision deteriorates due to overlapping communications causing time lag

Engineering Contradiction:
Improvecommunication system complexityVSAvoidtime synchronization precision
Core Design Contradiction:
Device complexityVSMeasurement precision

Solution Approach 1:

The communication network is segmented into two separate networks: a first communication network for time synchronization messages and a second communication network for image data transfer. This segmentation prevents overlapping communications and eliminates time lag caused by shared network contention, thereby maintaining time synchronization precision while managing device complexity through dedicated network channels.

Inventive Principle:
Principle #1Segmentation

2Productivity

If synchronization messages are transmitted with lower priority than image data, then image transfer efficiency is improved, but time synchronization accuracy deteriorates due to delayed synchronization messages

Engineering Contradiction:
Improveimage transfer efficiencyVSAvoidtime synchronization accuracy
Core Design Contradiction:
ProductivityVSMeasurement precision

Solution Approach 1:

By segmenting communications into separate networks, the patent eliminates the need for priority-based message scheduling. Time synchronization messages on the first network and image data on the second network are transmitted independently without competing for bandwidth, ensuring both high image transfer efficiency and accurate time synchronization simultaneously.

Inventive Principle:
Principle #1Segmentation

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

This solution reduces time lag and synchronization errors, ensuring accurate and efficient operation of radiation imaging systems, particularly during moving image capture, by prioritizing synchronization messages and using statistical correction values to maintain precise timing.

Implementation Method 1

a detection unit configured to detect radiation emitted by a radiation generation apparatus and transmitted through an object

Methodology Applied
Scientific EffectRadiation detection: Absorption (EM radiation)

Data Source

PatentUS10856834B2Radiation imaging apparatus, method of controlling radiation imaging apparatus, radiation imaging system, and non-transitory computer-readable storage medium
Publication Date: 2020.12.08 CANON KK
  • US10856834B2 patent drawing
  • US10856834B2 patent drawing
  • US10856834B2 patent drawing

AI summary

A radiation imaging apparatus acquires image data by detecting radiation emitted by a radiation generation apparatus, manages a time in the radiation imaging apparatus, generates a synchronization control message to be transmitted to synchronize a time managed by an irradiation control apparatus configured to control radiation irradiation by the radiation generation apparatus with the managed time, and transmits the image data and the synchronization control message, wherein the synchronization control message is transmitted with priority over the image data.