Which of the following formulas is used to determine the magnification factor?

Which of the following radiographic images of the skull is likely to have the greatest amount of shape distortion?

PART 2: Introduction to Diversity Indices (Measuring Diversity)   Using the table, calculate the total abundance in the community and the Pi value for each species. Next, calculate the natural log of Pi for each species (ln(Pi)) and then multiply the two columns to calculate Pi * ln(Pi). Limit your numbers to three decimal places. The Wildebeest has been given as an example for you.  Create your own table by clicking “Insert” and “Table” (You can also copy and paste the empty table and edit it). You are allowed to use a scientific calculator to solve the mathematical problems.  Pi = species abundance/total abundance in the community ln = natural log Species Species Abundance Pi  ln(Pi)  Pi * ln(Pi) Wildebeest 2 0.027 -3.624 -0.097 Elephant 3                                                 Zebra 5                                                 Hippo 1                                                 Impala 6                                                 Lion 3                                                 Baboon 17                                                 Warbler 22                                                 Crane 16                                                 Total abundance in the community   Start here                                                   H                

If the x-ray tube is moved closer to the image receptor, the radiation intensity at the IR:

If an initial exposure is made using 800 mA, 0.02 sec, 16 mAs, 70 kVp, 58” SID, 4” OID, 5:1 grid ratio, 0.2 mm focal spot and 3.0 mm of filtration, with a 14 x 17 in field size, and the technologist changes to the 0.3 mm focal spot for a second exposure without changing any other factors, what differences would you expect to see in the second exposure?1) Increased IR exposure2) Decreased IR exposure3) Increased contrast4) Decreased contrast5) Increased spatial resolution6) Decreased spatial resolution7) Increased distortion8) Decreased distortion

A radiograph that demonstrates considerable differences between brightness values is called

Which source-to-image distance will demonstrate the highest receptor exposure?

A radiographer has the choice of multiple radiographic systems, each using a different actual focal spot size. Which system should be used if maximum heat dissipation is required?

Which kVp selection would produce the greatest relative percentage of scattered radiation?

The distance between the anatomy being imaged and the focal spot is called: