Name that Vision!
Rods function best in what type of light?
What is dim light levels?
What is the cause of the primary source of radiation exposure for occupational personnel is due to?
What is Compton scatter?
What does the number of grid lines/ inch represent?
What is grid frequency?
These specialized photoreceptor cells are found in the retina
What is rods and cones?
Respectively, how many rods and cones are there within the eye?
Bonus +75: The rod cells regenerate rhodopsin at what rate?
What is 7,000,000 cones and 120,000,000 rods?
Bonus +75: What is the rate of 50 percent every 7 minutes?
the area of sharpest vision is located where in the eye?
What is subject contrast?
When the performance of a grid is measured, what indicates how well the grid improves contrast?
What is the K-factor?
When an error is made using a grid, what can occur?
What is grid-cut off?
What formula is used when converting from one grid ratio to another?
mAs1/mAs2 = GCF1/GCF2
What critical diagnostic element are all radiographic images missing?
What is depth?
What is the spatial resolution of structures dependent on?
What is the distance between structures of interest and the IR, and the body's placement with the IR
If a 10:1 grid was used on the first exposure and on the second a 12:1 grid is used with no technical change, what would we expect the image to look like?
What is light and underexposed?
Which effect occurs when the eye perceives a change in density?`
What is the Mach effect?
What will change within the body if there is an additive condition?
What is an increase in body tissue thickness, effective atomic number, and/ or tissue density?
This phenomenon occurs when intensely bright light from a viewing monitor floods the eye directly
What is veil glare?
Clinically speaking from a diagnostic viewpoint, what is the only useful radiation exposure?
What is radiation detected by the receptor?
What grid frequency is recommended for stationary grids in digital IR systems?
What is 178-200 lines per inch?
When a radiologist looks at a chest radiograph and the heart is positioned to the right of the patient's mediastinum, he/she naturally looks at the lead marker for laterality. Seeing this image as presented, presents a conflict with what aspect of the radiologist's expertise?
What is pattern recognition?
What does contrast improvement ability typically range between?
This effect occurs because the visual system has difficulty in perceiving contrast differences that are distant from one another
What is the boundary effect?
If you have determined that your patient has an additive condition that requires an increase in technique, what should you do first?
What is increasing kVp by 5-15% first?
What is the distance of the face of the grid to the points of convergence of the lead strips known as?
What is grid radius?
This tool compresses the entire grayscale while making the boundary appear more distinct than it really is.
What is edge enhancement?
Explain the difference between myopia, hyperopia, and presbyopia
What is