The document discusses techniques used in medical X-rays to improve image quality while reducing radiation dose to patients. It explains that increasing X-ray energy improves penetration and image quality, while increasing quantity increases radiation dose. Collimators restrict the X-ray beam width to only irradiate the imaged area. Filtration removes low-energy X-rays, improving penetration and image contrast. Special filters can compensate for varying tissue densities. Grids placed under patients reduce scattered X-rays, improving image contrast.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats
Rad 206 p12 Fundamentals of Imaging - Control of Scatter Radiationsehlawi
Fundamentals of Imaging
This course will provide you with the principles involved in the formation and recording of the radiologic image in both conventional and digital imaging systems as well as the principles of image quality assessment.
Control of Scatter Radiation
Rad 206 p11 Fundamentals of Imaging - Control of Scatter Radiationsehlawi
Fundamentals of Imaging
This course will provide you with the principles involved in the formation and recording of the radiologic image in both conventional and digital imaging systems as well as the principles of image quality assessment.
Control of Scatter Radiation
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats
Rad 206 p12 Fundamentals of Imaging - Control of Scatter Radiationsehlawi
Fundamentals of Imaging
This course will provide you with the principles involved in the formation and recording of the radiologic image in both conventional and digital imaging systems as well as the principles of image quality assessment.
Control of Scatter Radiation
Rad 206 p11 Fundamentals of Imaging - Control of Scatter Radiationsehlawi
Fundamentals of Imaging
This course will provide you with the principles involved in the formation and recording of the radiologic image in both conventional and digital imaging systems as well as the principles of image quality assessment.
Control of Scatter Radiation
IDEAL IMAGE CHARACTERISTICS
FACTORS RELATED TO THE RADIATION BEAM
FACTORS RELATED TO THE OBJECT
FACTORS RELATED TO THE TECHNIQUE
FACTORS RELATED TO RECORDING OF THE ROENTGEN IMAGE OF THE OBJECT
DARK/ LIGHT IMAGE IDEAL IMAGE
IDEAL QUALITY CRIETRIA
IDEAL IMAGE CHARACTERISTICS
FACTORS RELATED TO THE RADIATION BEAM
FACTORS RELATED TO THE OBJECT
FACTORS RELATED TO THE TECHNIQUE
FACTORS RELATED TO RECORDING OF THE ROENTGEN IMAGE OF THE OBJECT
DARK/ LIGHT IMAGE IDEAL IMAGE
IDEAL QUALITY CRIETRIA
This slides helpful in Quality and Factor affecting the Quality of X-ray in Radiology for students and Teachers. First we know about the Quality and those factor by which the quality of X-ray affect. Quality is main factor X-ray Imaging , because when quality increased the penetration also increased . Quality effect the Image resolution of Images.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
CW RADAR, FMCW RADAR, FMCW ALTIMETER, AND THEIR PARAMETERSveerababupersonal22
It consists of cw radar and fmcw radar ,range measurement,if amplifier and fmcw altimeterThe CW radar operates using continuous wave transmission, while the FMCW radar employs frequency-modulated continuous wave technology. Range measurement is a crucial aspect of radar systems, providing information about the distance to a target. The IF amplifier plays a key role in signal processing, amplifying intermediate frequency signals for further analysis. The FMCW altimeter utilizes frequency-modulated continuous wave technology to accurately measure altitude above a reference point.
3. X-ray Quality vs. Quantity
Quality = penetrating power (energy)
Quantity = # of X-rays in beam
↑kVp = ↑ speed of e- = ↑ quality
↑ mA = more e- hit target = ↑ quantity
↑s = longer exposure time = ↑ quantity
4. Problem:
Only x-rays of sufficient energy (quality) can
transmit through body to create an image.
Low-energy x rays are attenuated to a greater
extent than those of high energy (photoelectric
effect).
Thus, low-energy x-rays don’t contribute
substantially to image, but add to patient radiation
dose.
Therefore, we need to reduce low-energy (low-
quality) x-rays, and at the same time have the
right quantity of x-rays hitting the body part.
5. Collimators
The coverage of the X-ray beam is determined by the bevel
angle of the X-ray tube anode.
As the beam reaches the patient, the beam can be much
wider than the field-of-view (FOV) being imaged.
This leads to:
Increased patient dose
Increased Compton scattered X-rays
A collimator (also called a beam-restrictor) is placed under
the port of the X-ray tube to restrict the dimensions of the
beam to the imaging FOV.
5
Medical Equipment IV Spring 2018 Shereen M. El-Metwally and Inas A.
Yassine
7. Filtration
Is X-ray beam attenuation as it traverses several
attenuating materials before reaching patient.
Three kinds of filtration:
Inherent – due to glass envelope of tube, oil
insulation and the exit window in the tube housing
Added – aluminum shielding that blocks low energy
x-rays.
Special – used to image body parts that have
varying thickness or density.
Filtration “hardens” the x-ray beam.
i.e., x-ray beam has a higher average energy and is
able to penetrate more dense (i.e., harder) substances
such as bone.
9. X-ray Imaging
The tube – X-rays are produced
The body – X-rays interact with the body
The image – X-rays interact with film,
Detectors
Film processing, Signal analysis
10. Grids
Part of the “bucky” that holds the film cassette (detector)
Purpose: reduces scattered radiation that hits film to
improve contrast.
Grid is made of lead strips
Grid ratio = height/width of interspace
Hitting prep button causes grid to vibrate to blur out grid
lines (doesn’t show up on film).
Tradeoff between contrast and signal intensity.
“Bucky factor” is the factor by which the patient dose
increases while using an anti-scatter grid in order to
produce a certain signal intensity in the presence and
11.
12. Since the X-ray beam is in fact slightly diverging, the anti-scatter
grid can also be manufactured at the same diverging angle
Editor's Notes
↑ kVp = efficiency of x-ray production = ↑ quantity
Photoelectric effect is proportional to 1/E3
Has a light source in it for the radiographer to see where x-rays would hit the patient
The collimator consists of sheets of lead, which can be slid over one another to restrict the beam in either one or two dimensions.
An x-ray beam of lower average energy is said to be “softer” because it can penetrate only less dense (i.e., softer) substances such
as fat and muscle.
The effect of the added aluminum is to decrease the total number of photons but increase the average energy of photons in the beam.
Different thicknesses and composition of body parts determines the amount of x-ray penetration.
Filtration is measured in terms of “half-value layer”
Beam hardening is desirable because the filter removes low-energy x rays that, if left in the beam, would increase the radiation dose to the patient without contributing substantially to image formation.
Equalization filters are sometimes used in chest and spine imaging to compensate for the large differences in
x-ray transmission between the mediastinum (central part of thoracic cavity) and lungs.
Scattered X-rays provide little spatial information, and contribute to a background signal which reduces the image contrast.
To reduce the contribution from secondary radiation, an anti-scatter grid is placed between the patient and the X-ray detector.
The improvement in image contrast does, however, come at a cost in terms of an increase in the X-ray dose which is required to produce a given
image intensity while using an anti-scatter grid. Having finite thickness, the lead septa absorb some primary radiation, and X-rays which are scattered only at very small angles (and therefore contain useful spatial information) are also absorbed.
This trade-off can be characterized using a parameter known as the Bucky factor. If an equal X-ray dose is incident upon the detector in the presence and absence of an anti-scatter grid, then the dose that is delivered to the patient increases by a factor BF (Bucky factor).
Since the X-ray beam is in fact slightly diverging, the anti-scatter grid can also be manufactured at the same diverging angle with a focal point
~180 cm from the grid. The degree to which the contribution from Compton scattering is reduced is dictated by the thickness (t), length (h) and separation (d) of the lead strips.