« previous next »

Author Question: A form of beam restriction that is a flat piece of lead with a hole of the designated size and shape ... (Read 49 times)

Jipu 123

  • Hero Member
  • *****
  • Posts: 569
on: Jul 17, 2018
A form of beam restriction that is a flat piece of lead with a hole of the designated size and shape in its center is:
 
 an aperture diaphragm
  an extension cone
  PBL
  manual collimation

Question 2

Which positioning line connects the mentum of the chin to the external auditory meatus?
 
 infraorbitomeatal line
  acanthiomeatal line
  orbitomeatal line
  mentomeatal line


joshraies

  • Sr. Member
  • ****
  • Posts: 351
Reply #1 on: Jul 17, 2018
Answer to Question 1

an aperture diaphragm

Rationale: Aperture diaphragms provide an unexposed border around the periphery of the image. Dedicated chest units apply a fixed aperture diaphragm.

Answer to Question 2

mentomeatal line

Rationale: The line that connects the mentum of the chin to the external auditory meatus is the mentomeatal line.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Australopithecus sediba shares small brain size with other members of Australopithecus but also has Australopithecus sediba shares small brain size with other members of Australopithecus but also has
The frontal sinus, an airfilled space just behind the brow, is a unique size and shape in each of us The frontal sinus, an airfilled space just behind the brow, is a unique size and shape in each of us
The gaping hole in the destroyer USS Cole, in the port of Aden, Yemen, was the work of suicide bombe The gaping hole in the destroyer USS Cole, in the port of Aden, Yemen, was the work of suicide bombe
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
6. Nitric oxide reacts with oxygen to form nitrogen dioxide: 2 NO(g) + O2(g) ⇌ 2 NO2(g) What ... 6. Nitric oxide reacts with oxygen to form nitrogen dioxide: 2 NO(g) + O2(g) ⇌ 2 NO2(g) What ...
Constructing a restriction map (5 of 5) Constructing a restriction map (5 of 5)
Video: Generalized life cycles for plants and animals Animation

For a complete list of videos, visit our video library