Ppt on x ray film processing

Basics of X-Ray Diffraction Self-User Training for the X-Ray Diffraction SEF Scott A Speakman, Ph.D. 13-4009A (617) 253-6887

that is centered on the sample. Divergent X rays from the source hit the sample at different points on its surface. During the diffraction process the X rays are refocused at the detector slit. This arrangement/Incidence Angle Diffraction (GIXD) X-ray Reflectivity (XRR) Small Angle X-ray Scattering (SAXS) X-Ray Powder Diffraction (XRPD) More appropriately called polycrystalline X-ray diffraction, because it can also be used for sintered samples, metal foils, coatings and films, finished parts, etc. Used/

MIT Center for Materials Science and Engineering

angle domain boundaries will be formed. Curvature The film and substrate may become slightly curved rather than perfectly flat This may be the result of deposition process, thermal expansion mismatch between the film and substrate, etc Inhomogeneity or Gradients Both /is produced when the divergence of the incident X-ray beam matches the quality of the film An X-ray beam with very low divergence will scatter with low efficiency from a highly distorted film For example, Si-Ge multilayers often have /

Medical Physics at A Level

transformed into electromagnetic energy. Two kinds of x-rays are generated during this process. Brehmsstrahlung radiation, also called "braking radiation" or white x-rays is produced due to electron deceleration. Characteristic x-rays are also produced when electrons in target metal/, or without screens. Other types are intended primarily for use with fluorescent intensifying screens. Types of film X-ray films are commonly coated with emulsion on both sides of the support (to double the chance of exposure /

The JFK Skull X-rays: Evidence for Forgery

FORMULATING X-RAY TECHNIQUES unexposed film (i.e., unexposed to light) is pre-exposed for the time indicated in the following table and placed on top of the original. The cassette is closed and placed with the glass front toward the illuminator. The illuminator light is turned on for the length of time indicated. Processing is shorter than that necessary for routine radiography. The/

Chapter 11 Prime Factors.

(exposure time). Measured in mAs- primary controller of x-ray quantity. Density Relationship to mAs Radiographic film density is the degree of blackening of an x-ray film Created by deposits of black metallic silver on an x-ray film that has been exposed to light or x-ray and then processed Densities are the result of an x-ray exposure to the film and intensifying screens. Film density is determined by the amount of silver/

Conventional Radiography

of the exposure, usually expressed in milliseconds. General Terms Radiograph: is a film or other base material containing a processed image of an anatomic part of the patient as produced by action of x-rays on an IR. Radiography: the production of radiographs or other forms of radiographic images. Radiograph vs. x-ray film: x-ray film refers the physical piece of material on which a radiographic image is exposed/


cylindrical camera to produce a characteristic set of arcs on the film. Powder diffraction film When the film is removed from the camera, flattened and processed, it shows the diffraction lines and the holes for the incident and transmitted beams. Application of XRD XRD is a nondestructive technique. Some of the uses of x-ray diffraction are; Differentiation between crystalline and amorphous materials; Determination of the/

Advanced Biomedical Imaging Dr. Azza Helal A. Prof. of Medical Physics Faculty of Medicine Alexandria University Lecture 5 Advanced X ray machines &Mammogram.

cm. Decrease dose in mammography Small breast Compression Increase kv Increase contrast Decrease kv Beryllium window Grids / air gap Film gamma 3, low speed Increase resolution Small focal spot Single screen and single emulsion film Film processing Questions 1. Tabulate the differences between conventional and mammographic x ray machine? 2. Mention the main difference between conventional, computerized and digital radiography? 3. Define heel effect & mention its/

Computed Tomographic Imaging

appears dark (rather than shiny!). Thus, areas of the film exposed by X-rays are dark, unexposed areas are transparent. X-ray films are viewed as “negative” films against an illuminated background. Fluoroscopy: X-ray images can also be viewed with a fluorescent screen like that/ the colon is invisible because it blends with the other viscera in an X-ray image. Gas in the colon creates contrast. Joints between the articular processes Vertebrate: Thin shell of solid bone and spongy bone inside Spine of a/

Copyright © 2012, 2006, 2000, 1996 by Saunders, an imprint of Elsevier Inc. Chapter 8 Dental X-Ray Image Characteristics.

structure that appears black on film lacks density.  Radiopaque The portion of the processed radiographj that appears white The portion of the processed radiographj that appears white A structure that appears white on film is dense and absorbs or resists passage of the x-ray beam. A structure that appears white on film is dense and absorbs or resists passage of the x-ray beam. Copyright © 2012, 2006, 2000/

Chapter 11 The X-ray Darkroom.

you are processing in the x-ray room. The position of the x-ray unit is important (the primary beam should be focused away from the darkroom). Additionally, the darkroom walls should be lead lined (see state specifications for specifics). X-ray Proofing the Darkroom The amount of lead needed is determined by room size, material of walls, types of x-rays, film/screens used, tube placement, placement of x-ray room/



Introduction The word “tomography” is derived from the Greek word “tomos” to describe “a technique of x-ray photography by which a single plane is photographed,

can be easily accomplished by setting the distance traveled by the x-ray source and the x-ray film to be proportional to their respective distances to point A, /x-ray source, the patient, and the film remains unchanged, the magnification factor for each point located inside the tomographic plane is constant (the magnification factor is defined as the distance between the source and the shadow on the film over the distance between the source and the point in the tomographic plane). During the imaging process/



DIAGNOSTIC RADIOLOGY Part 1 : X-ray Beam Aim: To become familiar with the basic knowledge in radiation physics and image formation process.

and photons have different types of interactions with matter Two different forms of x-rays production, Bremsstrahlung and characteristic radiation contribute to the image formation process. Add module code number and lesson title 21 Where to Get More /better performance) focused grid Potter-Bucky system Add module code number and lesson title 60 Source of X-rays Lead Scattered X-rays Useful X-rays Film and cassette Patient Anti scatter grid (II) Topic 2 : Automatic Exposure Control (AEC) Automatic /

Film Processing. Dental X-Ray FilmFilm used in dental radiography is similar to photographic film, with some adaptations.  A photographic image is.

assistant must understand the composition of x-ray film and latent image formation that results in film exposure to x- rays. 2 Film Composition  Intraoral dental film is made up of a clear, semi-flexible, cellulose acetate film base that is coated on both sides with an emulsion of silver bromide, silver halide, and silver iodide that is sensitive to radiation. 3 Dental X-Ray Film ProcessingProcessing is a series of steps that/

Welcome. In navigating through the slides, you should click on the left mouse button when (1), you see the mouse holding an x-ray tubehead (see below),

indicates that it moved mesially as the tubehead moved distally. We know that the zygomatic process is buccal to the teeth and, using the SLOB rule, it follows that the x-ray beam was directed more mesially on the molar film (Buccal object moved opposite to tubehead movement). premolar molar Another way of determining the change in the direction of the beam is to/

AFAMS Residency Orientation April 16, 2012

X-Ray Organs absorb X-rays differently and thus their shadow on the film is different Bone: high absorption (film appears white) Tissue: moderate absorption (film appears grey) Air/Lungs: little absorption (film appears black) Types of CXRs PA and Lateral Supine AP Patient facing cassette X-ray 6 feet away Supine AP X-ray/ Apex at hilum Air bronchograms Normal or increased volume No shift Consolidation, air space process Not centered at hilum Air bronchograms Examples: TB TB can be seen as consolidation,/

1 Improvement of X-Ray Protection Properties of 3D Spacer Fabric by lead powder printing Dariush Semnani, Department of Textile Engineering, Isfahan University.

) less, b) medium and c) high value of lead. abc 17 Methodology To study the pass of ray through produced composite samples, negative films of experienced samples with different conditions of X-ray radiation were scanned and analyzed by image processing technique. Dark pixels referred to parts of X-ray passed from fabric sample and the others referred to lead particle parts of fabric as protective parts/

MIPR Lecture 6 Copyright Oleh Tretiak, 2004 1 Medical Imaging and Pattern Recognition Lecture 6 X-ray Imaging Oleh Tretiak.

produces a broad spectrum of energies MIPR Lecture 6 Copyright Oleh Tretiak, 2004 18 X-ray Attenuation For medical imaging, we can assume that X-rays travel along straight lines (rays). In the presence of matter, X-rays are removed from from a beam. This process is called attenuation. For homogeneous material and X-rays, attenuation follows an exponential law.  - linear attenuation coefficient, in cm -1 MIPR Lecture 6 Copyright/

FRCR: Physics Lectures Diagnostic Radiology

matter Contrast is generated by differential attenuation of the primary X-ray beam Attenuation is the result of both absorption and scatter interactions Scatter occurs in all directions, so conveys no information about where it originated – can degrade image quality, if it reaches film/detector Scatter increases with beam energy, and area irradiated Interaction Processes Elastic scattering Photoelectric effect Compton effect Photoelectric Effect Compton/

Chapter 15 Radiographic Intensifying Screens And Cassettes

and contrast resolution. Generally the conditions that increase speed reduce spatial resolution. Spatial Resolution When screens phosphor reacts with x-rays a larger area of the film is exposed than what would be exposed by radiation alone. This results in reduced spatial resolution and more blur./mesh is placed on top of the cassette. Poor Screen Contact A radiograph is taken and the film processed. The image is viewed from 2 to 3 meters from the view box. Poor contact will appear as a cloudy and blurry/

I am not an expert on any of this!

cylindrical camera to produce a characteristic set of arcs on the film. Powder Diffraction Film When the film is removed from the camera, flattened & processed, it shows the diffraction lines & the holes for the incident & transmitted beams. Some Typical Measurement Results Laue - “white” X-rays Yields stereoscopic projection of reciprocal lattice Rotating-Crystal method: monochromatic X-rays Fix source & rotate crystal to reveal reciprocal lattice Powder diffraction - monochromatic/

BME 560 Medical Imaging: X-ray, CT, and Nuclear Methods

attenuation coefficient = stopping power Conversion efficiency: total light energy per unit incident X-ray energy (usually 5 – 20%) Energy dependent Base Film Phosphor Coating Film Very similar to photographic film; must be developed to fix the image Two components: Base: Plastic sheet, dimensionally stable (size and shape do not change under environmental and processing conditions) Emulsion: Crystals of silver bromide suspended in gelatin substance; on one/


and to monitor tooth growth and development Types of X-rays X-rays are divided into two main categories: Intraoral: which means that the X-ray film is inside the mouth; Extraoral: which means that the film is outside the mouth Intraoral X-rays Are the most common type of X-ray taken. These X-rays provide a lot of detail and allow your dentist/ voltage. Set the exposure time. Make the exposure by depressing the exposure button located on the control panel. After making the exposure, process the X-ray film.

Digital Radiography Chapter 22. History of Digital Radiography Slower process of conversion because no pressing need to convert to digital radiography.

essentially same (X-ray tube, stand, etc). Once digital radiographic image is made, it is transferred to a dedicated digital radiography computer for “image processing”. Once digital radiographic image is made, it is transferred to a dedicated digital radiography computer for “image processing”. Image can then be adjusted, rotated, etc. Image can then be adjusted, rotated, etc. Limitations of Conventional Screen- film Radiography Limitations: Limitations/

Chapter 12 DarkroomProcedures. Darkroom Procedures n To repeat what was previously said about the composition of x-ray film, it has a base of cellulose.

. n This is a 1:2:3 ratio of developer to fixer to wash. Steps in Film Processing n Drying n The ideal situation for drying of x-ray film is a film drying box that combines a heating element with a circulating fan. It can dry in 15 minutes. n Film will dry properly if hung in air for a longer period (1+ hours). n A/

CHAPTER © 2011 The McGraw-Hill Companies, Inc. All rights reserved. 6 X-rays and Diagnostic Radiology.

.6Proper procedures for filing and maintaining x-ray films and records include documenting the patient’s name, the date, the type of x-ray, and the number of x-rays taken in the patient record card or in the record book; properly labeling the film with the referring doctor’s name, the date, and the patient’s name; placing the processed film in a film-filing envelope; and filing the envelope/

X-Ray Technology By: PROF. Dr. Moustafa Moustafa Mohamed Faculty of Allied Medical Science Pharos University in Alexandria.

than 1 % of the energy supplied is converted into X-radiation during this process. The rest is converted into the internal energy of the target. Properties of X-rays X-rays travel in straight lines. X-rays cannot be deflected by electric field or magnetic field. X-rays have a high penetrating power. Photographic film is blackened by X-rays. Fluorescent materials glow when X-rays are directed at them. Photoelectric emission can be produced/

Important terms used in imaging X-ray radiography Radio opacity:A structure which appeare on radiograph is radio opaque.It is because of more attenuations.

process Penetration. Vertebral bodies and disc spaces should just be visible through the cardiac shadow. Portable (AP or Antero-posterior) FILM 007 PA (Postero-anterior) FILM 008 Projection PAAP 009 Low Lung Volumes 010 Over Exposure Proper Exposure 011 99 012 013 Clinical and x-ray/bones Lack of vitamin D Lack of calcium The above defficiency may be either nutritional or disease process X-ray appearences Loss of normal zone of proviosnal calcification Fraying of growth plate Splaying cupping of metaphysis /

Radiology and Diagnostic Imaging CHAPTER 20. 2 Radiology and Diagnostic Imaging Overview X-rays –High-energy electromagnetic waves –Travel in straight.

Process of taking X-rays of the inside of a joint, after a contrast medium has been injected into the joint Contrast medium makes the inside of the joint visible 11 Barium Enema (BE) Pronounced –(BAH-ree-um EN-eh-mah) Defined –Infusion of a radiopaque contrast medium, barium sulfate, into the rectum –Contrast medium is retained in lower intestinal tract while X-ray films/radiation 28 Mammography Pronounced –(mam-OG-rah-fee) Defined –Process of taking X-rays of the soft tissue of the breast to detect various /

PASI - Electron Microscopy - Chile 1 Lyman - EDS Qual Energy-Dispersive X-ray Spectrometry in the AEM Charles Lyman Based on presentations developed for.

Pulse Processing EDS can process only one photon at a time » A second photon entering, while the first photon pulse is being processed, will be combined with the first photon » Photons will be recorded as the sum of their energies X-rays /X-rays Generated in TEM Detector for x-rays from illumination system » thick, high-Z metal acts as “hard x-ray sensor" Uniform NiO thin film used to normalize the spurious "in hole" counts, thus » NiO film on Mo grid* Mo grid bar NiO film on C Hole Electron beam Hard x-ray/

8 / 6 / 2000Pixel 2000 /JPM1 X-Ray Medical Imaging and Pixel detectors PIXEL 2000 Genova, June 5-8 th 2000 J.P.Moy,, Moirans, France TRI ELLX.

, the required dose is 100 to 40% of the film dose (for a given S/N in the image). All the advantages of a digital image : processing, transfer, archiving, access to Computer Aided Diagnosis,.... 8 / 6 / 2000Pixel 2000 /JPM29 The weak points of the new X-ray Flat detectors High investment costs (detector + image display & process.), because the detector relies on specific techniques (a-Si/

Film/Screen Imaging Computed Radiography Digital Radiography IMAGE RECEPTOR SYSTEMS 1.

that leave patient Interact with phosphors of intensifying screens 100’s of light photons created to make image on film Light photons expose silver halide crystals in the film emulsion – Turn black metallic silver after procession 31 Film Development 32 Process of X-ray Image 33 FILM X-RAY LATENT IMAGE PROCESSOR MANIFEST IMAGE 34 Developing is the stage where the latent image is converted to the manifest (visible) Image/

Geometric Factors Focal Spot Object Film a b c h ---- = --- = --- = --- A B C H Film B A H C Object ba h c.

process by which the silver halide crystals are manufactured and by the mixture of these crystals into the gelatin. Size and concentration of crystals have a primary influence on speed. Producing the Latent Image The resulting silver grain is formed. Silver halide that is not irradiated remain inactive. The irradiated and non-irradiated silver halide produces the latent image. Types of X-ray Film/

Alhanouf Alshedi X-ray film basic structure 2 ed Lecture.

in density across the film. As a Film latitude increases the film contrast decreases. Characteristic of a X-ray film is a graph in which a film or film screen system responds to different amount of exposure. Characteristics of X-ray Film: How is the image produced ? When a radiograph of an object is made on a film, x-ray must pass through parts of different thickness. The area of the x-ray film located underneath the/

The Dürr XR NDT X-Ray Chemicals L E T´S T A L K A B O U T.

: 3 (2) developer components 1 starter component for the developer 2 fixative components ONE Part X-Ray chemistry concentrates only: 1 developer component 1 fixative component Advantage # 4 Dürr XR NDT X-Ray Chemicals: Other NDT X-Ray Chemicals: Advantage # 5 Extremely stable during processing For all BAM certified NDT films Tested with AGFA NDT CERTIFIED PMC STRIP 24 Advantage # 6 24-month shelf life - guaranteed!!!  Sulphur/

The Abdominal X-Ray. The Abdominal X-Ray: The abdominal x-ray (AXR) has a much more limited value in diagnosis than a chest x-ray. The radiation exposure.

on the AXR. Anatomy on the Abdominal X-Ray: Abdominal X-Rays: Film Specifics and Technical Factors: Film Specifics: Name of Patient Age & Date of Birth Location of Patient Date Taken Film Number (if applicable ) Film Technical factors: Type of projection (Supine is/confused with ureteric calculi. They are usually oval in shape. The line of the ureter is along the transverse processes of the lumbar vertebrae. Phleboliths from calcified pelvic veins may appear like bladder stones. Calcification may appear in /

بسم الله الرحمن الرحيم Image Critique نقد صورة الاشعّه Lecture No.2.

. Mustafa Zuhair Mahmoud X-ray Film 2. Film Type (Clinical Usage): D. Laser Film: Sensitive to red light. Must be processed in complete darkness. Assistant Prof. Dr. Mustafa Zuhair Mahmoud Assistant Prof. Dr. Mustafa Zuhair Mahmoud X-ray Film 2. Film Type (Clinical Usage): E. Duplication film: Assistant Prof. Dr. Mustafa Zuhair Mahmoud Assistant Prof. Dr. Mustafa Zuhair Mahmoud X-ray Film 2. Film Type (Clinical Usage): E. Duplication film: Single emulsion film. Used for producing copies/

Radiation Protection in Paediatric Radiology

paediatric radiography Discuss important considerations in paediatric radiography using mobile X-ray units Radiation Protection in Paediatric Radiology L03.Radiation protection in screen-film radiography IAEA Post Graduate Educational Course in Radiation Protection in /of quality assessment, quality assurance and audit programs for all aspects of the department’s work, including film processing and justification Introduce and use a system that allows patient dose be assessed regularly Monitor reject rate and/

CR/QA RADCHEX. History of digital imaging Early, crude digital detectors were developed in the 1970’s Image quality was problematic Processing time of.

is global and will eventually replace all film/screen applications How a CR system operates Photo Stimulated Phosphor (PSP) is exposed to x-ray X-rays cause phosphor to store invisible light image Image Plate (IP) removed and placed into reader and exposed to laser light IP then releases visible light which is fed to a computer for image processing CR operates in a similar manner/

Structural Analysis of Protein Structure

a lower energy state. Growth of crystals X-ray diffraction Heavy-metal complex Build model Refinement X-ray crystallography Drug design information Crystallization Structure analysis X-ray crystallography Model refinement Data collection Data procession http://www-structure.llnl.gov/xray/101index.html/ in many different directions, are recorded on a detector, either a piece of x-ray film or an area detector. The crystal was rotated one degree while this pattern was recorded. The pattern of/

Augusta Technical College 2011

provides a permanent record of radiation dose received TLD (thermoluminescent dosimeter) Often used instead of a film badge (may be reused) Both film badges and TLDs typically worn for 1-3 months before being processed to determine dose Radiography Equipment – X-Ray Generators X-rays are generated by directing a stream of high-speed electrons at a target material, such as tungsten, which has a high atomic/

Introduction –Conventional radiology –Why digital? –Why dual energy? Experimental setup Image acquisition Image processing and results Dual energy radiology.

H10.2% N 3.4% Other 1.3% Conventional radiography: image receptors Direct-exposure X-ray film –emulsion of grains of AgBr (   1  m) suspended in gelatin –X-rays interact mostly with Ag and Br Ag and Br have a larger  than the /strip  Threshold scans needed to extract analog information Counts integrated over the measurement period transmitted to DAQ Fully parallel signal processing for all channels Binary architecture for readout electronics  1 bit information (yes/no) is extracted from each strip /


processing the film Types of Intraoral Radiographs: Periapical, Bite-wing, Occlusal (Table 16-1, pg. 236) Film Packet: consists of the outer wrap, lead foil, black paper, one or two films. (Fig. 16-1, pg. 236)white side is always placed toward the patients cheek/tooth, raised dot aids in mounting x-ray, black paper protects the film, lead foil absorbs the x-rays that pass through the film Double Film/

Imaging Systems X-Rays. Imaging Systems: Shared Elements 1.Where did the energy come from? 2.What happens when the energy interacts with matter? 3.How.

Laser surgery … a) The most important effect of the intensifying screens on image quality is that they blur the image. b)Motion blur c) Finite size of x-ray tube focal spot Processing MRI PET scan Film photography Digital photography Television VCR DVD Microscopes Telescopes CRT LCD Plasma display Thermal imagers Passive IR sensors Radar Movies Overhead projector Slide projector Holography Copiers Scanners Printers/

Working towards High Reflectivity in the Extreme Ultraviolet & Soft X-ray Students: Guillermo A. Acosta, Marie K. Urry, Richard L. Sandberg, Kristi R.

gov/Science-Articles/Archive/xray-inside-cells.html. Soft X-ray Microscopes Thin Film or Multilayer Mirrors EUV Astronomy The Earth’s magnetosphere in the EUV BYU EUV Optics November 5, 2003 4 EUV & soft x-rays Visible is ~400 to ~700 nm (1.7 /the Eyring Science Center (ESC) BYU EUV Optics October 10, 2003 40 Making Thin Films Films are made using a process called sputtering or through thermal evaporation. These processes are conducted in high vacuum systems. For sputtering, a target or piece of the material/

Bioelectronics, Medical Imaging and Our Bodies Week 3: X-Rays and CT Scans: Useful but Carcinogenic? + Monitoring Devices Maryse de la Giroday 6-week course.

/ xrays.html http://science.hq.nasa.gov/kids/imagers/ems/ xrays.html X-Ray process Hospital: X-ray sensitive film is put on one side of your body, and X-rays are shot through you. Dentist, the film is put inside your mouth, on one side of your teeth, and X-rays are shot through your jaw … Tooth X-Ray Why X-Rays are useful? Because your bones and teeth are dense and absorb more/

Surface Diffraction Studies of Organic Thin Films Mehmet Fatih Danışman Middle East Technical University Department of Chemistry.

0.4 eV Multilayer film structure Full lines indicate a periodicity of 6.1 Å along direction Dashed lines indicate a periodicity of 15.3 Å along direction Multilayer, T s =200K, E kin ≈ 5 eV Ex-situ X-Ray Reflectivity X-ray peak indicates a periodicity /high energy pentacene molecules has a decisive role in improving the growth: keeping the substrate temperature low, in fact, processes like de-wetting or disorder induced by the growth of different polymorphs are hindered The monolayer and the multilayer have /

Oral radiology II. X-Ray Machine The X-ray machine consist of: 1) head A) tube B) cone and accessories 2) Control panel and timer 3) Adjusting arm.

is relatively narrow and used for views of the anterior teeth (24 X40mm) 2, the standard film size used for adults (31 X 41 mm) Processing X-Ray Film Manual processing Rapid processing chemicals Automatic Film Processing MANUAL PROCESSING Developer – water - fixer Automatic Film Processing GENERAL STEPS FOR MAKING AN EXPOSURE Greet and seat the patient. Adjust the x-ray unit setting. position the tube head. Wash hands thoroughly. Examine the oral cavity. Position the/

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