Ultrasound Technology Essay - 1526 Words

What is Ultrasound? Ultrasound or ultrasonography is a medical imaging technique that uses high frequency sound waves. It is a high pitch frequency that cannot be heard by the human ear. In ultra sound the following happens: High frequency sound pulses (1-5megahertz) are transmitted from the ultrasound machine into your body using a probe. The sound wave will travel into your body until it hits an object such as soft tissue and bone. When the sound wave hits these objects some of the wave will be reflected back to the probe. While some waves may carry on further till they hit another object and then reflected back. The probe picks up these reflected sound waves and relays them to the machine. The distance and time from the probe,†¦show more content†¦The probe also has an acoustic lens this helps to focus the emitted sound waves. The transducer probe can come in many different shapes and sizes. The field of view depends on the shape of the probe. Also the frequency of the waves emit ted determines how deep the sound waves will penetrate and also the resolution of the image that will be produced. Probes can be used to move across the body but they can also be inserted through various openings. E.g. orally, this enables the probe to get closer to object that is being examined. Being closer to the object may allow for more detailed views. The central processing unit is basically the brains behind the ultrasound machine. It is a computer that sends the electric current to the probe to tell it to emit the sound waves. It also receives the electrical pulses from the probe which received the sound waves that were reflected back. The CPU processes all the calculations and all the data the probe receives. Once this information has been processed, the CPU forms an image on the monitor. It can also store the data into its memory. Transducer pulse controls allows the operator of the machine to set and change the frequency and duration of the ultrasound pulses. The display or the monitor allows for the data that has been processed by the CPU to be displayed as an image. Images can be displayed in black and white or in color depending on the make and model of theShow MoreRelatedThe Application Of Ultrasound Technology1188 Words   |  5 Pagesof ultrasonic equipment 5 Future development of ultrasound technology 5 Conclusion 6 References 6 â€Æ' Introduction Ultrasound is a sound wave that has a frequency greater than the highest frequency humans can hear, therefore it occupies frequency ranges from 20 kHz up to several GHz. Ultrasound is bound by the exactly same wave properties as all other sorts of waves, those being: reflection, refraction, diffraction and mode conversion. Ultrasound is widely used in current days, across a vast numberRead More2D and 3/4D Ultrasound Technology Essay2130 Words   |  9 Pages1.5.3 2D and 3/4D ultrasound technology Since 2003, there have been advances in ultrasound imaging technology with applications such as two-dimensional (2D) ultrasound scanning, which provides a greyscale image of the detailed internal structures of the foetus. With additional software, the same ultrasound machine can also produce enhanced images using 3/4D scans. Currently, sonographers are involved in utilising scan technologies in hospital and private-clinic environments at various stages duringRead MoreBenefits And Benefits Of Ultrasound Technology Essay1494 Words   |  6 Pages Introduction: The Advantages and Inconveniencies of Ultrasound Technology The delivery of the portable compact ultrasound technology in India proposes a significant potential health benefit to millions suffering from painful or potentially life-threatening diseases, such as breast cancer, gallbladder, and pancreas illnesses. Ultrasound is nontoxic, noninvasive and does not use ionizing radiation. The ultrasound equipment has the potential to increase efficacy and early detection inRead Moretechnology has advanced ultrasound1186 Words   |  5 Pagesï » ¿ Austin Smith Technology has advanced Ultrasound Waukesha County Technical College 12/3/13 Table of Contents Abstract†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..page 3 Introduction†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦page 4 3d/4D imaging†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦page 4 Pure Wave Transducer†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦page 5 Color Doppler†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.page 6 Point-of-Care†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..page 6 Conclusion†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..page 7 Reference page†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦page 8 Abstract Read MoreEssay The Ethics of Sonography and Gendercide1530 Words   |  7 PagesThe constantly growing field of medical technology has raised many questions especially pertaining to ethics. The mapping of the human genome, cloning technologies, stem cell research, and of course reproductive technology has caused some very real dilemmas over the role of the human decision in the creation and orientation of new life. Humans are able to accomplish amazing things in science, but at what cost? The ubiquitous nature of reproductive technology has caused a new discipline of reproductiveRead MoreMulti Point Haptic Feedback Above Interactive Surfaces1049 Words   |  5 PagesScience Nile University Giza/ Egypt m.abdelwahab@nu.edu.eg Abstract This paper introduces UltraHaptics, a new technology designed to provide multi-point mid-air haptic feedback above an interactive surface. The technology depends on focusing ultrasound to project separated points of haptic feedback through the display and then directly to the user’s bare hands. This new technology is simple and accessible, which make it easy to enter different fields of industry and have wide applications. IndexRead MorePercutaneous Medical Image And Ultrasound Image1043 Words   |  5 PagesObjectives It has been proved that ultrasound imaging is the main and primary device that is used as guidance for percutaneous medical procedures (Gray 2006). However, poor needle tip localization needs to be solved. Also, localize the needle tip in deep locations (`Cheung Rohling 2004) and slope insertion angles (Edgombe Hocking 2010). Enhancing the needle visibility will lead to decrease procedures’ failure. Mohammad mentioned that in his studies in 2013, an ultrasound actuated needle with a transducerRead MoreThe Medical Ultra Sound Field1155 Words   |  5 Pagesexpanding and making medical progress, and new findings. Ultrasounds are becoming more and more popular everyday. People are coming up with many new ways to help treat patients, and also new procedures to get better, and more defined images of the body. Also, people are making it possible to find some problems quicker than they ever could have before. A diagnostic medical sonographer is a professional, which has had the proper schooling to use technology to help diagnose patients. Sonographers use a specialRead MoreThe First Invention Of Radiology1507 Words   |  7 PagesRoentgen’s discovery would help detect tumors, broken bones and bullets buried within bodies, never before seen with the naked eye. Since the invention of X-rays, there had been numerous discoveries of similar inventions, from image intensifier to ult rasound to magnetic resonance imaging. Without these inventions, humans would not have been able to see the inner workings of the body or detect key information in modern times that allow us to prevent serious illnesses where other inventions proved uselessRead MoreDetection Of A Sublingual Lymphatic Malformation1325 Words   |  6 Pagesfetus: a rare case Sarah McCuaig, Diana Ghaeni, Linnell Weatherhead British Columbia Institute of Technology DSON 4007 Sonography Project Word Count: 1543 Abstract Lymphatic malformations (LMs) are benign cystic lesions which, while rare, often affect the pediatric age group. LMs can be macrocystic, microcystic or a combination of the two, and frequently involve the head and neck regions. Ultrasound is useful in the prenatal detection of LMs; however, these lesions can be missed. This case study

Durer View of Painting and Printmaking Business Essay

Essays on Durer View of Painting and Printmaking Business Essay The paper "Durer View of Painting and Printmaking Business" is an outstanding example of an essay on history. The letter by Durer explains the performance of two businesses in the 16th century for printing and paint making around 1503. Specifically, it details the two businesses that Durer carried out in the region. Durer decided to turn his efforts into printmaking since the printing work was more profitable than paint making. The painting that Durer made had to use blue pigment ultramarine that is expensive, reducing the profitability of the art business. Durer considered it a loss after realizing that he could have made more from printmaking. The Heller’s 200-florin fee charged reduced his profitability in the business where he considers having made 400 florins. Durer argued that he could have made 1000 florins if he engaged in the printmaking business. In addition, the painting was taking a long time compared to the printmaking proving the loss that Durer had to experience in the art (Larry and Jeffrey 122). Several advantages were noted for printmaking as compared to the painting. First, printmaking was cost-effective, as it required cheaper raw materials, reducing the production cost. After completion, the portraits would require regular painting that indicated the complexities that existed in the art business, taking into account the time and resources used in the artwork. For this reason, printmaking was considered efficient as it required minimal checking and had more income. In addition, it is clear from the letter that new skills in printmaking practice attracted more customers than the painting career. Therefore, it was easier and cheaper for Durer to carry on the printmaking business as compared to the art that requires so many inputs (Larry and Jeffrey 123).

Charge Pump Free Essays

A charge pump is a kind of DC to DC converter that uses capacitors as energy storage elements to create either a higher or lower voltage power source. Charge pump circuits are capable of high efficiencies, sometimes as high as 90-95% while being electrically simple circuits. Charge pumps use some form of switching device(s) to control the connection of voltages to the capacitor. We will write a custom essay sample on Charge Pump or any similar topic only for you Order Now For instance, to generate a higher voltage, the first stage involves the capacitor being connected across a voltage and charged up. In the second stage, the capacitor is disconnected from the original charging voltage and reconnected with its negative terminal to the original positive charging voltage. Because the capacitor retains the voltage across it (ignoring leakage effects) the positive terminal voltage is added to the original, effectively doubling the voltage. The pulsing nature of the higher voltage output is typically smoothed by the use of an output capacitor. This is the charge pumping action, which typically operates at tens of kilohertz up to several megahertz to minimize the amount of capacitance required. The capacitor used as the charge pump is typically known as the â€Å"flying capacitor†. Another way to explain the operation of a charge pump is to consider it as the combination of a DC to AC converter (the switches) followed by a voltage multiplier. The voltage is load-dependent; higher loads result in lower average voltages. Charge pumps can double voltages, triple voltages, halve voltages, invert voltages, fractionally multiply or scale voltages such as x3/2, x4/3, x2/3, etc. and generate arbitrary voltages, depending on the controller and circuit topology. The term ‘charge pump’ is also used in phase-locked loop (PLL) circuits. This is a completely different application. In a PLL the phase difference between the reference signal (often from a crystal oscillator) and the output signal is translated into two signals – UP and DN. The two signals control switches to steer current into or out of a capacitor, causing the voltage across the capacitor to increase or decrease. In each cycle, the time during which the switch is turned on is proportional to the phase difference, hence the charge delivered is dependent on the phase difference also. The voltage on the capacitor is used to tune a voltage-controlled oscillator (VCO), generating the desired output signal frequency. The use of a charge pump naturally adds a pole at the origin in the loop transfer function of the PLL, since the charge-pump current is driven into a capacitor to generate a voltage (V=I/(sC)). The additional pole at the origin is desirable because when considering the closed-loop transfer function of the PLL, this pole at the origin integrates the error signal and causes the system to track the input with one more order. The charge pump in a PLL design is constructed in integrated-circuit (IC) technology, consisting of pull-up, pull-down transistors and on-chip capacitors. A resistor is also added to stabilize the closed-loop PLL. An internal power source or a charge pump is essential in every system. An embedded system has to perform tasks continuously from power-up to power-off and may even be kept ‘on’ continuously. Certain systems do not have a power source of their own: they connect to an external power supply or are powered by the use of charge pumps. Network Interface Card (NIC) and Graphic Accelerator are examples of embedded systems that do not have their own power supply and connect to PC power-supply lines. (2) A charge pump consists of a diode in the series followed by a charging capacitor. The diode gets forward bias input from an external signal; for example, from an RTS signal in the case of the mouse used with a computer. Charge pumps bring the power from a non-supply line. Ninepins COM port has a signal called Request To Send (RTS). It is an active low signal. Most of the time it is in inactive state logic ‘1’ (~5V). The charge pump inside the mouse uses it to store the charge when the mouse is in an idle state; the pump dissipates the power when the mouse is used. A regulator circuit getting input from this capacitor gives the required voltage supply. A charge pump in a contact-less smart card uses the radiations from a host machine when inserted into that. How to cite Charge Pump, Essay examples