...Since an x-ray tube requires a direct current, some sort of means is required to change from AC to DC. With this x-ray tube it uses a single phase unrectified power source. Rectification is essential for safe and efficient operation of an x-ray tube. Since it is a single phase it will end up having a pulsating x-ray beam. This is caused by the alternating swing in voltage from 0 to 120 times each second under full wave rectification. A disadvantage of a single phase power source is that the x-rays created from single-phase voltage have a value close to zero and are of little diagnostic value due to their low penetrability. * single-phase generators produce voltage that varies from 0 to its maximum value With a metal enclosure the tube is able to maintain its constant electric potential between the electrons of the tube current and the enclosure. Some of the benefits of a metal tube are that it will have a longer life and is less likely to fail. With a metal enclosure you eliminate the problem of tungsten vaporization through grounding of the metal enclosure. The rotating anode which is usually made of molybdenum due to its poor thermal conduction allows the electron beam to interact with a larger target area; therefore, the heating of the anode is not confined to a small spot like with stationary anodes. The heat capacity can be improved by increasing the speed the anode is rotating at. A rotating anode is used in units that produce high-intensity beams and allows...
Words: 515 - Pages: 3
...A STUDY ON RADIATION PROTECTION AMONG PATIENTS AND STAFF IN THE IMAGING DEPARTMENT AT KENYATTA NATIONAL HOSPITAL. RESEARCH DONE BY: DENIS NOVENA MUNG’AHU COLLEGE NUMBER: D/MIS/10007/191 RESEARCH PROPOSAL SUBMITTED TO THE DEPARTMENT OF MEDICAL IMAGING SCIENCES-NYERI CAMPUS IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE STUDY. JANUARY 2013 KENYA MEDICAL TRAINING COLLEGE P.O BOX 466 NYERI. Contents DECLARATION 1 DEDICATION 3 List of abbreviation 4 Operational definition 5 Chapter 1 6 1.0 Introduction 6 1.1 Broad objective 6 1.2 Specific Objectives 6 1.3 Problem Statement 6 1.4 Research Question 7 1.6 Study Justification 8 Chapter 2 9 Literature review 9 2.0: Introduction 9 2.1: Practice of radiation protection principles by the radiographers 10 2.1.1: Beam collimation by the radiographer 10 2.2.2: Beam Limiting Devices 11 2.2.2: Technique Selection 12 2.2.3: Patient identification 12 2.2: The practice of the radiation protection principles 13 The principle of limiting time 13 2.2.2 The principle of distance 14 2.2.3 The principle of applying shielding 15 2.3 To determine patients' level of knowledge 15 2.4 Conclusion 16 Chapter 3 16 Methodology 16 3.0 Background information 16 3.1 Position and size 16 3.2 Topography, climate and temperature 17 3.3 Population 17 3.5 Design 18 3.6 Study area 18 3.7 Sampling size determination 18 3.8 Ethical consideration 19 CHAPTER 4 19 APPENDIX I...
Words: 3100 - Pages: 13
...with our portable x-ray machines by performing transformation upgrades to both existing analog units or to trade them in and use their value to offset the total price incurred by the purchase of new units. This paper will discuss several factors that may affect the decision making process, along with a preliminary analysis of the problem through the use of marginal analysis. Executive Summary The decision to purchase a new system or to upgrade the existing x-ray machine, the hospital administration must consider the lowest cost for the hospital. By minimizing the cost for the x-ray machine the hospital will lower cost for the patients and the community that it serves. Current system The current x-ray machine flat value would be $12,000 each. Each day the hospital uses the current machines to make 8.5 x-rays per day. The average revenue for each x-ray is $65.00. The hospital calculates the revenue of the machines by multiplying the number of x-rays by the revenue ($65.00 x 8.5 = $553 per day). Looking at the total revenue for the year, $553 per day x 365, the hospital sees revenue of $201845 per year. Cost consideration #1 The administration first looked at the cost of upgrading the existing x-ray machines. The cost to upgrade (2) GE AMX 4 Plus Portable X-ray Units is $88,000 each. The upgrade utilizes the existing units transport mechanism, battery pack and charging components, the current x-ray generator and x-ray tube. When the reconditioning...
Words: 967 - Pages: 4
...doctor may be able to tell if a bone is broken. Bone is the hardest tissue in the human body, but when bones are subjected to forces that exceed their strength, they may break. Doctors can usually recognize most fractures by examining the injury and taking X-rays. Sometimes an X-ray will not show a fracture. In these situations, other tests can be performed. Looking at broken bones effects all the people. “From broken bones to disease the X-Ray is one of the most useful medical advancements in history.” (). “An X-ray is a common imaging test that has been used for decades to help doctors view the inside of the body without having to make an incision.”() Bone is living tissue. It consists of cells, blood vessels, connective tissue, proteins, and fibers, as well as minerals such as calcium and phosphorus. Bones break when they are extreme force or stress. X-rays of the injured area usually confirm the diagnosis of a broken bone. This is the most common way to evaluate a fracture, which provides clear images of the bone. The doctor will most likely use an x-ray to verify the diagnosis. They can show whether a bone is intact or broken. They can also show the type of fracture and exactly where it is located within the bone. X-rays are a form of electromagnetic radiation, as are radio waves, infrared radiation, visible light, ultraviolet radiation and microwaves. One of the most common and...
Words: 1448 - Pages: 6
...The importance of X-Rays in the veterinary field is not one to be over looked. Animals are not just pets to some people. Some rely on their existence to perform everyday tasks that others may take for granted, such as opening the refrigerator or crossing the street. Some animals go beyond companionship and perform jobs that save many lives. Above all else, animals, whether domestic or wild, play an important role in our ecosystem (Importance of Animals and Plants in Ecosystem , 2014). So it is easy to understand why there are so many professionals that are dedicated to their health and well-being. Radiographs are not limited to human use but also benefit many other species. Since animals cannot speak and express pain like people can, radiographs are used to help veterinarians identify certain diseases or injuries. Conventional X-ray machines can be found in the veterinary office; however, since animals hardly stay still, sedation is often used. This may cause more complications to certain procedures. A new development, called the NOMAD Pro Veterinary, has changed the way many veterinarians are looking at X-Ray procedures. The NOMAD Pro Veterinary is a portable, battery operated X-ray device that is ideal for intraoral radiographs as well as limbs and extremities (Aribex). This lightweight handheld device weighs only 5.5 pounds, allowing for the operator to easily maneuver it. It is safe to use and its special lead-free internal shielding and an external backscatter shield...
Words: 684 - Pages: 3
...Service Level Improvements County Hospital X-Ray Department Sullivan University MGT 620 David E. Beck Luke Bubenzer Joseph Brent Hardin Marco Monteiro Executive Summary County Hospital has identified an opportunity to improve the patient experience when utilizing the existing x-ray department. Patients have expressed dissatisfaction with the amount of time needed to complete the entire x-ray process. The process improvement team has identified several different tactics that can be pursued in order to improve the patient satisfaction. This proposal discusses several viable alternatives. X-Ray Department Current Operation Current system is not patient compatible in terms of time spent in the process. Current system is not patient compatible in terms of time spent in the process. The main concern with the current operation is the amount of time needed for each patient to complete the entire x-ray process. This process is defined as when the patient leaves his physician’s offices to go to the x-ray center. The process is complete when the patient leaves the x-ray center and the physician receives the developed x-rays via courier service. Excessive numbers of steps lead to patient dissatisfaction and excessive costs on wasted materials and labor. Excessive numbers of steps lead to patient dissatisfaction and excessive costs on wasted materials and labor. There are several keys steps in the process for each patient. The first step is that...
Words: 2178 - Pages: 9
...An X-ray is a form of high-energy electromagnetic radiation. (Basic Principle) Other types of electromagnetic radiation that make up the electromagnetic spectrum are microwaves, infrared light, visible light, ultraviolet light, and gamme rays. They all travel in waves, but possess different wavelengths. X-rays are shorter in wavelength compared to ultraviolet rays, but longer wavelengths when compared to gamma rays. (Comparison and Contrast) X rays are produced inside a vacuum tube called a Coolidge tube by the use of the principal cathode ray tube or an x-ray tube. (Location) In the case of the x-ray tube, the cathode and the anode have a voltage of 20-100 kV. The anode is typically made out of a substance called tungsten. Electrons emerging from the cathode hit the tungsten, loses energy from ionization and radiative collision, and results in x-rays and Brehmsstrahlung (white light photon). (Analysis) To be classified as x-rays, the frequency must range from 3x10^16 through 3x10^19 Hz. (Physical Description) The word X-ray, known as Roentgen rays in German-speaking countries, was named after its discoverer Wilhelm Conrad Rontgen. It was aptly named “X-rays,” with the “x” being a mathematical symbol for something unknown. He accidentally discovered it while experimenting with vacuum tubes in 1895. (Word Derivation) Strong, deeply penetrating, and highly destructive rays with short wavelengths are called hard X-rays. Those with longer wavelength and less penetrating...
Words: 375 - Pages: 2
...Background: Nasoenteric tube insertion is a common procedure used in the clinical setting. Often viewed as a safe bedside procedure, there are risks for numerous complications including tracheobronchial insertion, which could lead to deleterious consequences. We present the first case of bilateral pneumothorax caused by the insertion of mal-positioned nasoenteric tube and discuss common pitfalls for diagnostic positioning as well as risk factors that can predispose a patient to improper placement. Case Report: In this case report, we demonstrate a 74-year-old male patient who presents with multiple orthopedic injuries following an auto-pedestrian collision. During his hospital stay, a routine nasoenteric tube was inserted for the purposes of enteral nutrition. Follow up abdominal X-ray revealed the nasoenteric tube misplaced in the left pleural space. After removal of the nasoenteric tube, a follow up chest X-ray revealed bilateral pneumothorax. The patient fell into respiratory distress and subsequent bilateral chest tubes were placed. Over the course of the next three weeks the patient improved, both chest tubes were removed, and the patient made a full recovery....
Words: 1203 - Pages: 5
...X-Radiation Project Abstract This project will look at the history of X-radiation in its notable historical forms and trace the use of the technology all the way to contemporary forms of X-Radiation, including computed tomography. The origins of the two technologies will be traced as well as the improvements that have been made to them over the past number of decades. The importance of the technology will be assessed in terms of its efficiency and usefulness in the context of modern medicine. The finding is that CT, CAT, and X-ray allow for great convenience, lower cost, and higher quality imaging than is possible without these technologies. Background & State of the Art The story of X-rays begins in the late Nineteenth Century when a German professor named Wilhelm Conrad Roentgen introduced the discovery that a cathode ray tube could create a fluorescent glow of crystals that were placed on a surface near the tube (NA, 2014). After giving the cathode ray tube a higher voltage and removing all air from the inside of the tube, the professor found that the tube gave nearby objects a fluorescent glow of light. The upshot for the professor from this improvised experiment was that the tube must be giving off a new kind of ray that scientists were not yet familiar with. The most significant part of Roentgen’s discovery, for modern medical purposes, at least, was that the new ray...
Words: 952 - Pages: 4
...Scientific Inventions That Changed Medicine for Providers and Patients. Jason Robert Luedeman UMUC 13 June 2016 X Rays and the History of Radiography X-rays were discovered in 1895 by Wilhelm Conrad Roentgen (1845-1923) who was a Professor at Wuerzburg University in Germany. Working with a cathode-ray tube in his laboratory, Roentgen observed a fluorescent glow of crystals on a table near his tube. The tube that Roentgen was working with consisted of a glass envelope (bulb) with positive and negative electrodes encapsulated in it. The air in the tube was evacuated, and when a high voltage was applied, the tube produced a fluorescent glow. Roentgen shielded the tube with heavy black paper, and discovered a green colored fluorescent light generated by a material located a few feet away from the tube. He concluded that a new type of ray was being emitted from the tube. This ray was capable of passing through the heavy paper covering and exciting the phosphorescent materials in the room. He found that the new ray could pass through most substances casting shadows of solid objects. Roentgen also discovered that the ray could pass through the tissue of humans, but not bones and metal objects. One of Roentgen's first experiments late in 1895 was a film of the hand of his wife, Bertha. It is interesting that the first use of X-rays were for an industrial (not medical) application, as Roentgen produced a radiograph of a set of weights in a box to show his colleagues Within...
Words: 632 - Pages: 3
...helped give birth to the discovery of x-rays by Physicist, Wilhelm Roentgen. His discovery of a new kind of ray, spurred the age of modern physics and turned the world upside down in diagnostic medicine. Wilhelm Roetgen was born on March 27, 1845 in Lennnep, Germany. His parents were Fedrick and Charolette...
Words: 1337 - Pages: 6
...inches) It limits the size of the area exposed by the primary beam. It also reduces the amount of scatter. Film holder: The holder aligns the x-ray beam with the film in the patient’s mouth. Filtration: The filtration system removes the long (soft) non-penetrating...
Words: 1054 - Pages: 5
...GM tube The GM tube is a hollow cylinder filled with a gas at low pressure. The tube has a thin window made of mica at one end. There is a central electrode inside the GM tube. A voltage supply is connected across the casing of the tube and the central electrode as shown in the following diagram. When an alpha or beta or gamma radiation enters the tube it produces ions in the gas. The ions created in the gas enable the tube to conduct. A current is produced in the tube for a short time. The current produces a voltage pulse. Each voltage pulse corresponds to one ionising radiation entering the GM tube. The voltage pulse is amplified and counted. Sources of background radiation Background radiation is all around us. Some of it comes from natural sources and some comes from artificial sources. Natural sources Natural sources of background radiation include: * Cosmic rays - radiation that reaches the Earth from space * Rocks and soil - some rocks are radioactive and give off radioactive radon gas * Living things - plants absorb radioactive materials from the soil and these pass up the food chain For most people, natural sources contribute the most to their background radiation dose. Average contribution of different sources to natural background radiation Artificial sources There is little we can do about natural background radiation. After all, we cannot stop eating, drinking or breathing to avoid it! However, human activity has added to background...
Words: 304 - Pages: 2
...SPEED READING (SKIMMING AND SCANNING) Skimming and scanning are two specific speed-reading techniques, which enable you to cover a vast amount of material very rapidly. SKIMMING Skimming is reading for an overview of the material, to get a general idea of what the text is about. It helps the reader form a general opinion about the text. It’s a method of rapidly moving your eyes over the text to get only the main ideas and a general impression of the text. Skimming is the most rapid of all reading. It doesn’t require reading every word. It is a useful study technique for reading course books or reading for assignments. If students first skim through the chapter to get a general idea and then go back to read in detail, they will better understand it. How to Skim: * Read the title. * Read the introduction or the first paragraph. * Read the first sentence of every other paragraph. * Read any headings and sub-headings. * Notice any pictures, charts, or graphs. * Notice any italicized or boldface words or phrases. * Read the summary or last paragraph. SKIMMING EXERCISE # 1: Here is a reading passage. Read ONLY the first line of each paragraph. Do not read the whole paragraph. Then answer the questions at the end. READING PASSAGE Here I want to try to give you an answer to the question: What personal qualities are desirable in a teacher? Probably no two people would draw up exactly similar lists, but I think the following would be generally accepted. First, the teacher's...
Words: 2627 - Pages: 11
...having to cut them open. Medical imaging, especially X-ray examinations and sonography which is also known to some as ultrasound, is essential in an everyday medical setting. Preventive medicine as well as healing medicine depends on the proper diagnosis and treatment by physicians, and the use of diagnostic imaging can help evaluate the course of a disease, as well as assess and document the disease in response to the treatment. Medical imaging has rapidly expanded from the first medical image discovered by Professor Wilhelm Conrad Roentgen. During a late night experiment in November of 1895, Roentgen, a physics professor from Germany, was examining Crookes tubes. He noticed that some light had managed to pass through a tube that he had wrapped in thin black cardboard, reflecting on the wall of his dark laboratory. Upon further investigation he found that the light could also be passed through paper, books, and eventually through human flesh. Unintentionally, he had stumbled upon a very important discovery that led to the discovery of what we now call an X-ray. One of the very first x-rays was one that Roentgen made was of his wife’s hand. The flesh of the hand looked like a shadow, and around the finger bone the wedding band was visible and solid. This was the first time that bone had been viewed through the skin. Within a few months of the discovery, x-ray machines were produced to be used in the medical field. The x-ray machine was the first tool that allowed the internal...
Words: 971 - Pages: 4