Calculate the new  mA  required to maintain the same IR exposure produced with the original values.

The problem of unequal subject radiographic density is solved by a

Which of the following collimation settings will demonstrate the most uniform beam intensity within the exposure field?

All filtration can be expressed in terms of the thickness of

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                

Pertaining to the diagram, each of the lines 1 – 4 represents the intensity change due to filtration at different kVp levels.The greatest amount of attenuation is seen for valuse represented by:

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

The y-axis for all emission spectra represents the:

An x-ray source is producing an entrance skin exposure of 3.1 mSv per hour at 10 cm from the source. What is the entrance skin exposure at 15 cm from the source?

The area of the x-ray beam projected towards the patient is described as the: