What is a bowtie filter?
Abstract. A pre-patient attenuator (“bowtie filter” or “bowtie”) is used to modulate an incoming x-ray beam as a function of the angle of the x-ray with respect to a patient to balance the photon flux on a detector array.
What is the bowtie method?
Introduction. The Bowtie method is a risk evaluation method that can be used to analyse and demonstrate causal relationships in high risk scenarios. The method takes its name from the shape of the diagram that you create, which looks like a men’s bowtie.
What is bowtie server?
What is BowTieServer? BowTieServer unites different risk disciplines in a single, central repository with bowties and related information. It combines all the powerful tools we already have, like BowTieXP, IncidentXP, and AuditXP, and unifies them across the organization.
How does filtration effect contrast?
Our experiments showed that appropriate filtrations could reduce certain low- and high-energy components of X-ray spectra which have limited contributions to image contrast. At the same time, such filtration could improve the contrast-detail detectability, particularly at relatively low kVp and high filtration.
What are beam shaping filters made of?
Beam-shaping filters are generally composed of: aluminum.
What is bow tie XP?
BowTieXP is the most used risk assessment software that is based on the bowtie method. It enables you to easily create bowtie diagrams to assess risk. BowTieXP is unique in its ability to visualize complex risks in a way that is understandable, yet also allows for detailed risk-based improvement plans.
Where is Bow Tie used?
A primary use of bow tie analysis is to identify control gaps, where additional controls may be warranted. Examining causes, consequences and the existing controls that address them helps to identify gaps in the current controls (as shown in Figure 1).
What is the main purpose of filtration?
Filtration is used to separate particles and fluid in a suspension, where the fluid can be a liquid, a gas or a supercritical fluid.
What is a bowtie diagram?
A ‘bowtie’ is a diagram that visualizes the risk you are dealing with in just one, easy to understand the picture. The diagram An example of a bowtie diagramm.
How do I open the Qi macros bow tie assessment templates?
QI Macros is installed as a new tab on Excel’s menu. To open these templates, click on the QI Macros menu > Improvement tools > Hazard Analysis – Bow Tie: The template has several tabs. There are two box tie assessment templates.
How do I access the bow tie and box tie templates?
There are two styles of Bow Tie templates in QI Macros Add-in for Excel. To access these templates, click on the QI Macros menu > Improvement tools > Hazard Analysis – Bow Tie: The template has several tabs. There are two box tie assessment templates. One is similar to the Shell Oil template and another format was provided by a customer:
What are the components of a good bow tie risk assessment?
A good Bow Tie Risk Assessment may require analysis of: 1. Hazards and threats (e.g., software viruses) 2. Barriers to prevent catastrophic event (e.g., antivirus software, periodic scans) 3. Events (e.g., system shutdown due to software virus) 4. Barriers to prevent harm to others (e.g., shutdown and full system scan)