Scattering is defined as - Study guides, Class notes & Summaries

What is the correct term used to describe an intravenous injection of a concentrated volume of contrast media? a. bolus b. infusion c. extravasation d. luminal - ANSWER-a. bolus Which of the following methods utilizes a detector that captures x-ray energy and converts it into an electronic signal? a. indirect capture b. CCD c. cassette based radiography d. direct capture - ANSWER-d. direct capture The energy of a characteristic x-ray photon created when an L shell electron fills a...

ARDMS Breast Registry Review Exam 503 Questions with Verified Answers Artifact - CORRECT ANSWER An echo feature present or absent in a sonographic image that does not correspond to the presence or absence of a real structure. Eg. enhancement or shadowing. Attenuation - CORRECT ANSWER The reduction of intensity (and amplitude) of a sound wave as it travels through a material. Attenuation is due to absorption, reflection, and scattering. Complex - CORRECT ANSWER A structure in the body ...

List the two types of multimode fiber - Answer graded index and step index List the core and cladding sizes for the US and European standards of graded index fiber - Answer 62.5/125 and 50/125 microns List the two wavelengths used in multimode fiber - Answer 850 and 1300 nanometers What type of dispersion is found in multimode fibers? - Answer modal List two types of intrinsic attenuation - Answer absorption and scattering List the four examples of extrinsic attenuation - Answer m...

SPI ULTRASOUND REGISTRY REVIEW QUESTIONS AND ANSWERS GRADED A SPL wavelength x # of cycles With phased array transducers, the transmitted sound beam is steered by Varying the timing of pulses to the individual piezoelectric elements What type of wave is sound? mechanical and longitudinal The Frequency ranges for Ultrasound are: > 20,000 Hz (20kHz) The speed of sound in soft tissue is: 1540 m/s Linear sequence Array transducer that fires the elements in groups Unit for Wavelength is mill...

Test Bank on Essentials of Dental Radiography 9th EditionBy Evelyn Thomson,Orlen JohnsonChapter 1 Multiple Choice 1. Who was awarded the first Nobel Prize for physics in 1901, for his experimental work with radiation? 2. W. J. Morton 3. O. Walkhof 4. W. D. Coolidge 5. W. C. Roentgen 6. Who is credited with introducing the bitewing radiograph? 7. F. W. McCormack 8. H. R. Raper 9. G. M. Fitzgerald 10. C. E. Kells 11. Who developed the hot cathode ray tube? 12. W. D. Coolidge 13. W. A. Price 14. H...

What is meant by matter? Anything that occupies space and has weight What are the three basic physics states in which matter can exist? Solid, liquid, and gas What is meant by pressure? Force that acts on a unit of area What is the standard sea level atmospheric pressure express in inches of mercury and in pounds per square inch 29.92 inches of mercury and 14.69 pounds per square inch What characteristic of the atmosphere determines the speed of sound? Its temper...

microbe - Answer a living organism that requires a microscope to be seen 2 types of microbial organisms - Answer prokaryotes [cell lacks nucleus] -archaea -bacteria eukaryotes [cell w/ nucleus] -algae/plants -fungi/animals -protists 3 domains of life - Answer Bacteria, Archaea, Eukarya normal microbiota - Answer microbes normally present in and on the human body aid digestion prevent diseases by competing with pathogen microorganisms in environment - Answer recycling of n...

NICET Level 1 inspection and Testing Questions and Answers 100% Pass When using a pulse load tester on a sealed lead acid battery, the minimum acceptable capacity is... 80% When a software change is made to a fire alarm system, what percentage of the initiating devices not affected by the change must be tested 10% When testing elevator recall, the elevator should go to the alternate level when: The lobby smoke detector on the recall level is activated Minimum requirement for system documenta...

optic zone - Answer the central portion of a contact lens which contains the refractive power and generally corresponds to the central corneal cap posterior apecal radius - Answer this term is generally used in reference to spin-cast soft lenses. the curvature of the posterior surface of the lens changes with the refractive power. the radius of curvature is measured at the apex of the posterior surface. steeper base curve - Answer occurs when the posterior radius of curvature is decreased ...

SPI MOCK EXAM QUESTIONS AND ANSWERS GRADED A When the ELASTICITY of a medium is HIGH, the _____ is HIGH - stiffness - prop. speed - compressibility - reflectivity compressibility What term describes the # of cycles that an acoustic variable completes in a second? - period - freq. - PRP - variable rate freq. What happens to venous flow return to the HEART when a person INHALES? increases What establishes the freq. of an US wave? - transducer - medium through which sound travels - bot...