Density is a radiographic property that affects the detail of the radiograph by determining the overall blackness on the film (Adler, 2013). The major governing factor for density is mAs; mAs is found by multiplying the milliampere by the time, which is recorded in seconds (Adler, 2013). The density of an image is directly proportional to the technical factors of milliampere per second (Bushong,2013). The optical density can be measured with the use of a densitometer, which will give density a numerical value (Bushong,2013). Milliampere per second is the primary controlling factor for density, and mAs can be manipulated to maintain density when there are other factors such as kVp influencing the radiographic density.
Density and mAs have a direct correlation; if mAs decreases the radiographic density will decrease as well, and vice versa. To prove the relationship between density and mAs an experiment was performed. The factors that remained constant during this experiment was the utilization of the same cassette for all exposures, a 55 kVp technical setting, and the same hand phantom. During the experiment the only factor that would change is the mAs. For the first exposure the milliampere was set to 100, and the time used was .05 which would yield 5 mAs. The second exposure was made to show a decrease in density by halving the mAs, and it was produced using 50 milliampere and .05 time which would give 2.5 mAs. The final exposure was created to show an increase in density by doubling the original mAs. The technique used was 50 mA and .2 seconds resulting in a mAs of 10. After the images were processed density was given a numerical value with the use of a densitometer, and the same spot on each image was used. On the first image the density measured 1.24. On the second exposure the density was halved to 1.1, and on the final exposure density will double to 1.53. Upon reviewing the densitometer readings it is evident that mAs and density have a direct relationship which means that if mAs is increased the numerical value of density will increase and vice versa.
The second experiment performed was to explain how to maintain radiographic density when kVp is increased by fifteen percent. Kvp has an effect on both x-ray properties of quantity and quality (Adler, 2013).
My interest in MRI started when I first read the book “MRI, The Basics” written by the author Ray Hashemi. By the time I successfully finished my MRI clinical placement in Tehran University of Medical Sciences, I knew for sure that MRI would be the field I would be choosing to take on. What attracts me most about MRI is how beautifully scientist could create a technology that can take advantage of the magnetic moments of human body for imaging it without any harms of ionizing radiation. Although there are drawbacks to MRI, combining it with other modalities would be a more effective approach to an accurate diagnosis.
These BGO crystals are arranged into 64 distinct segments so that the scintillation light from each of the segments can be distributed onto the photocathodes of four photomultiplier tubes to be amplified. These “block detectors” are placed into modules of four arranged as eight columns of 32 rows of crystals each. A ring of these detectors surrounds the patient during...
In this experiment, there were several objectives. First, this lab was designed to determine the difference, if any, between the densities of Coke and Diet Coke. It was designed to evaluate the accuracy and precision of several lab equipment measurements. This lab was also designed to be an introduction to the LabQuest Data and the Logger Pro data analysis database. Random, systematic, and gross errors are errors made during experiments that can have significant effects to the results. Random errors do not really have a specific cause, but still causes a few of the measurements to either be a little high or a little low. Systematic errors occur when there are limitations or mistakes on lab equipment or lab procedures. These kinds of errors cause measurements to be either be always high or always low. The last kind of error is gross errors. Gross errors occur when machines or equipment fail completely. However, gross errors usually occur due to a personal mistake. For this experiment, the number of significant figures is very important and depends on the equipment being used. When using the volumetric pipette and burette, the measurements are rounded to the hundredth place while in a graduated cylinder, it is rounded to the tenth place.
...s strength in the experiment rather than a limitation which future studies should also monitor.
Preparing a patient for a nuclear medical procedure, a radioactive tracer material (or radioactive dye) is either injected or huffed through a mask. The camera monitors the dye and sees how it processes in your body, which the dye eventually collects in the part of the body which is to be scanned and because the tracer material gives off gamma rays, which are used as energy, the energy is then detected by the scanner. The devices work together to measure the amount of tracer active in your body to help produce special pictures to detail the structuring and functioning of your organs and inner body works (MassGeneral,2014).
Getting an MRI is a non-invasive method used to look at images inside an object. MRI’s are mainly used to observe pathological or physiological developments of living tissues. The patient simply lies on his or her back and slides onto the bore- the tube running through the magnet. An MRI’s job is to find tissue and determine what it is, by using radio wave pulses of energy. The MRI creates 2-D or 3-D images of each point in the patient’s body. The MRI system can cause tissues in the body to take on different appearances, which is helpful to radiologists who read it. It can also show flowing blood to help show the arterial system.
I am a patient and caring person who enjoy helping people. My ambition to become a Diagnostic Imaging technologist developed when I was working at Queen Elizabeth University Hospital in Glasgow. During this time, I worked as a temporary support worker who helped patients to attend their scheduled medical examinations at the Imaging Department.
The training, experience and interests during my existence up to now happen to be quite varied. I've resided and labored in Germany, The country and France too as with the United kingdom. Lately, I've thought extensively about altering my career and been attracted to radiography because it offers attractive possibilities to use abilities and private characteristics which i consider I possess, to supply an immediately tangible and satisfying contribution to individuals??utes health.
"Imaging and radiology." Magill's Medical Guide, 4th Rev. ed.. 2008. eLibrary. Web. 16 Dec. 2013.
Radiology is one of the few so-called “physical-science”-based fields of medicine, making it a challenging and rewarding application of an academic interest in science. It combines advanced knowledge of human physiology with principles of atomic physics and nuclear decay, electricity and magnetism, and both organic and inorg...
Setting up the apparatus was quick and easy, but measuring the DCPIP solution took a bit of time because they had to be the same volume so that they don’t affect the results. Although there were variables that were controlled, there was another variable which I did not identify until after our investigations were done.
There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.
d) Beyer T, Freudenberg L, Townsend D, Czernin J (2010). The future of hybrid imaging—part 1: Hybrid imaging technologies and SPECT/CT. Insights Into Imaging: 1-9. [PMC free article]. URL http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3288981/
For so many years I’ve asked myself the question, “what are you going to do with your life?” For a period of time I struggled with this question. Today, I sit staring at my computer, confronting myself, asking my subconscious “what do I want to do for the rest of my life?” Have I finally found the answer I 've been looking for, or am I under the false assumption that this is the right path for me. This semester has been the ultimate opportunity to explore my questions, doubt, issues, and concerns. I feel that by the end of this paper I will have answered all these questions, and will have made the best decision for my future.
Hillman, Bruce J. (1997, September 6). Medical imaging in the 21st century. The Lancet, vol. 350, p. 731.