PHYSICS FOR MEDICAL RADIATION - EXAM 1 Done to distinction level and verified.

PHYSICS FOR MEDICAL RADIATION - EXAM 1 Done to distinction level and verified. Physics - ANS The science of space, time, matter, energy and their interactions at the most fundamental level. Time - ANS Dimension that relates to when events occur. Matter - ANS Anything that occupies space and has mass. Energy - ANS The ability to do work Medical Radiations/Radiology - ANS The application of different types of radiation to the diagnosis and treatment of disease. Radiation is the energy that is emitted and transferred through space. What are the specialties within Medical Imaging? - ANS - Radiography - X-rays to produce images. - Computed Tomography: A rotating X-ray beam to image "slices" of the body. - Magnetic Resonance Imaging: Strong magnetic field and radio waves to image the body. - Medical Sonography: reflected sound waves to produce images of organs and tissues in the body. - Nuclear Med: administrating trace amounts of a radioactive substance to a patient and detecting emitted radiation to form a body part. Radiation Therapy - ANS The use of targeted doses of radiation to a patient's body to treat cancer. Accuracy - ANS How close a measured or calculated quantity is to the actual or true value. Precision - ANS The extent to which repeated measurements give the same value Precision is indicated by its significant figures - When adding or subtracting: the decimal places of the least number of decimal places is used - When multiplying or dividing: rounded to the number with least number of significant figures. Direct proportionality - ANS If x increases, Y will increase in direct proportion. Slope equation - ANS Change in Y/Change in X Inversely proportionality - ANS If X increases, Y decreases in proportionality What are the three most fundamental qualities within physics? - ANS Length (m), Mass (kg) and Seconds (s) What is the fundamental unit for length (metres) based on? - ANS The speed of light What is the fundamental unit for mass (kilogram) based on? - ANS The metal cylinder kept on Paris What is the fundamental unit for time (seconds) based on? - ANS The vibration of Cesium atom What are the other SI units? - ANS Ampere - Electrical current Kelvin - Temperature