AndyFutureRDH.com

We are approacing the July boards! Only days left! You should be comfortable with most of the material and should spend some remaining time practicing case studies, reviewing any subjects you don't feel strong in, and making sure you glance through your pathology book to familarize yourself with the pictures as you might see them on the case studies. For those of you who are taking the boards, just think this time next week you will be putting all your books away and will feel a big amount of weight is lifted from you. Remember, you have been preparing for over 2 years for this test...show them what your made of!
Good Luck!
Andy

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"A woman is like a tea bag – you can’t tell how strong she is until you put her in hot water."

~ Nancy Reagan
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~ X-ray filter - layers of aluminum metal used to filter x-ray beam
A) 1.5 mm added filtration for machines operating at < 70kVp
B) 2.5 mm added filtration for machines operating at > 70 kVp

Arthrography - joint radiography, good for TMJ

Axial (basilar)(submentovertex) projection - "jug handle view", cranial base

Caldwell projection - all aspects of the orbit, sinuses

Computed tomography (CT) - good for measuring tissue thickness when placing implants

Lateral (Cephalometric) head plate- common projection used for orthodontics to assess facial growth

Lateral Jaw- records right or left side of the jaws

Lateral Oblique mandibular projection- mandibular condyle, coronoid process, ramus and body of
Mandible

Lateral Skull projection - sinuses, nasopharynx, maxilla

Panoramic- records entire maxilla, mandible, and immediately adjacent structures, impacted teeth,etc

Posterior-anterior (PA) projection- entire mandible except condyles

Towne & Reverse Towne projection- condyle, occipital bone, orbital floor, zygomatic arch, middle ear structures

Waters projection- view useful for examining maxillary sinuses as well as frontal and ethmoid sinuses

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Practice Questions

1.
Lisa decided to change xray machines in her new operatory. The old machine had an 8" PID and was set at 26 exposure time and due to the knobs being broken she could not change it. If she decided to go to a 16" PID and a fully functioning xray machine. What would happen to the intensity if set at proper exposures?

A) The intensity stays the same, but the exposure time would alter the density
B) The intensity is directly proportional to a factor of 4 per every exposure time, thus meaning it is increased by 4.
C) The exposure time is decreased by 4
D) The intensity would be decreased by 4

2.
Which of the following has no antibody production associated with it?

A) Type I
B) Type II
C) Type III
D) Type IV
E) None of the above, they all do.

3.
Identify which of the following is not a type of particulate radiation:

A) alpha particles
B) beta particles
C) protons
D) nucleons

4.
Identify the reduction in exposure time when changing from D-speed film to E-speed film:

A) reduce exposure by1/8
B) reduce exposure by1/4
C) reduce exposure by1/3
D) reduce exposure by1/2

5.
Angela is manually developing radiographs and does not notice a difference in solution temperatures. Identify the error that Angela would cause when a film is subjected to sudden temperature changes (such as between developer solution and water bath)

A) reticulation of emulsion
B) yellow-brown stains
C) fixer spots
D) static electricity

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Answers:

1. D Dont pay attention to the rest of the garbage. It is only asking about intenisty and when the cone size is doubled, then the intensity is decreased by 4
2. Type IV, or delayed hypersensitivity is the only reaction that does not have an associated antibody.
Primary antibodies are: Type I=IgE Type II= IgG Type III= Type IgG
3. D - Nucleons
4. D - by 1/2 - From D spead to E speed, you decrease exposure by one-half
5. A

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Keep Smiling and Happy Studying!!!!!!
Andy Codding, RDH
Graduated - Floyd College - May 2002
Rome, Georgia
www.AndyFutureRDH.com

Copyright 2002 - Andy Codding, RDH All rights reserved.
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