Radiobiology

Article Critique #1 Authors of the article “Computed Tomography – An Increasing Source of Radiation Exposure” commend the diagnostic advantages of computed tomography (CT), but declare there is evidence and concern of the discipline’s overuse in various patient populations, especially pediatrics. Of the “more than 62 million CT scans per year,” almost 16% of these exams are performed on children (David & Hall, 2007, para. 1). The article’s title and abstract clearly pinpoint the dilemma. With the

Summary “Pediatric Exposures to Ionizing Radiation: Carcinogenic Considerations” was exceedingly informative about the risks of ionizing radiation on the pediatric population. The main idea was centered around the understanding that children are much more sensitive to radiation than adults. Its focus was comprised of three main concepts which included evidence from accidental exposures, radiation therapy, and computed tomography scans. Each of these concerns were discussed in great detail by introducing

Since x-rays were discovered in 1895, there have been several improvements made to diagnostic x-ray to make it safer for both the patient and the radiographer. Some of these improvements include, aluminum filters, protective housing, lead shields/ aprons, and quicker exposure film. These changes have undoubtedly improved the diagnostic radiation process, however both patient and radiographer will still receive some dose of radiation. “The effects of radiation on tissue are divided into two types:

Research Assignment Contemporary Physics Michael A. Torch Dr. David R. Simpson Health Physicist Radiation has been present since the birth of the universe. Upon its discovery in the early 19th century, humans have used radiation for its beneficial purposes that date back decades. However, when used precariously or in large quantities, radiation can be dangerous. It can cause detrimental effects to living organisms. Medical facilities, nuclear power plants, research laboratories and academic industries

In the dental setting the main concern is the dental radiation effects on children. Panoramic dental x-rays can cause DNA damage and cellular death in oral mucosa cells of these children. Cone-beam CT scanner, which was claimed to be the safe, is harmful on children due to them being more susceptible to radiation effects. Children are by far more susceptible to changes in their cells from a given dose of radiation compared to adults because they are still growing, developing, and changing. Radiation

Radiation quantity and units Most scientists in the international community measure radiation using the System International (SI), a uniform system of weights and measures that evolved from the metric system. In the United States, however, the conventional system of measurement is still widely used. 2.2.1) Units of Radioactivity: The original unit for measuring the amount of radioactivity was the curie (Ci)–first defined to correspond to one gram of radium-226 and more recently defined as: 1 curie

(Windows to the Universe. 2014). If sufficient damage to DNA is achieved, chromosome abnormalities may be noted, the damaged DNA can attempt to repair itself, sometimes forming patterns dissimilar to its prior layout. Karaman et al (2005) describes the removal of one or more nitrogenous bases within the DNA sequence as a deletion error. Substitution is explicated as an error which occurs when one base pair is replaced by another and insertion is defined as an error which arises as new base pairs

Public Health Problem “Radiation is energy that travels as a wave or particle (Thompson E.G., Hahn C, 2013). Different types of radiation exists, light coming from the sun being the most common source known to people. Thus, society is exposed to radiation on the daily basis. Ionizing radiation, in particular, can be harmful - depending on the source and the degree of exposure. (Thompson E.G., Hahn C, 2013). DNA mutations can occur when ionizing radiation is absorbed by a human cell, causing the

Tony Au 1/21/15 Section: AK Research Paper In 2050, after over 50,000 people colonize Mars, Do Not Go Gentle, a private space company on Earth is planning to have its first human exploration of Saturn’s satellite, Titan. However, the dangers of radiation and the length of the trip from Earth jeopardize the mission for the humans on this mission to explore Titan. The mission will be using robotic AI’s and space ship that uses ion thrusters for propulsion. One of the topics that will be talked

1. Name of student GHANIA AL HATTALI. Used one 2. Title of project Investigation to establish the dose rate profile for some nuclear cardiology procedures. 3. Supervisor(s) Andrew Fielding Senior Lecturer Faculty of Science and Technology Queensland University of Technology (QUT) City Centre, QLD 4000 Australia - Brisbane Ph: +61 7 3138 5325 Email: a.fielding@qut.edu.au 4. detailed description of proposed project (a) Aims There are three aims of this project first of all to measure dose rate