CT Warm-Up Scanning via Beam Limiter Slot Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In CT devices, warm-up scanning necessitates the target object to be moved, causing inconvenience and additional ionization radiation due to the need for repositioning and additional scout image scanning.
Innovation Solution
Implementing warm-up scanning by closing the slot of the beam limiter to prevent X-rays from reaching the target object, allowing the object to remain stationary during the process, and controlling the gantry rotation speed to match clinical sequence scanning requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If warm-up scanning is implemented by moving the target object out of the scanner room, then the radiation source heat capacity can be increased, but the target object suffers extra ionization radiation and inconvenience
Solution Approach 1:
The patent segments the scanning process into two distinct phases: warm-up scanning with the beam limiter slot closed (no radiation to patient) and clinical scanning with the slot open (radiation enabled). This allows the radiation source to be warmed up without exposing the patient to unnecessary radiation.
Solution Approach 2:
The beam limiter slot acts as an intermediary element that can be opened or closed to control X-ray transmission. During warm-up scanning, the slot is closed to block radiation while still allowing the scanning mechanism to operate and warm up the source.
2Reliability
If the target object is moved for warm-up scanning, then radiation source maintenance is enabled, but additional scout image scanning is necessary causing extra radiation and time loss
Solution Approach 1:
The beam limiter slot is closed before initiating warm-up scanning, preparing the system in advance to prevent radiation exposure. This preliminary action allows the warm-up process to proceed without requiring subsequent scout images to verify patient position, saving time and reducing radiation.
3Temperature
If the target object is moved during warm-up scanning, then radiation source heat capacity is increased, but scanning image quality may deteriorate due to position changes
Solution Approach 1:
The beam limiter slot is selectively closed only during the warm-up phase while remaining open during clinical scanning. This localized control ensures that radiation protection is applied only where and when needed, without affecting the quality of the actual clinical images.
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
Eliminates the need for additional scout image scanning, reduces ionization radiation exposure, and improves scanning image quality by keeping the target object still and optimizing gantry rotation speed.
Implementation Method 1
closing a slot of a beam limiter before a warm-up scanning process is initiated
Implementation Method 2
initiating a gantry to rotate and controlling the gantry to rotate at a speed which is required in a clinical sequence scanning process
Data Source
AI summary
A system and a method for implementing warm-up scanning in a CT device are provided. The method includes: closing a slot of a beam limiter before a warm-up scanning process is initiated; implementing the warm-up scanning process to a CT radiation source; and opening the slot of the beam limiter after the warm-up scanning process is finished. The target object may not need to move during the warm-up scanning process. Therefore, a second time scout image scanning is no longer necessary and extra ionization radiation may be avoided.