Rad Exam 1 Questions with Complete
Answers
radiology - Answer-study of x-rays
State when x-rays were discovered and by whom - Answer-nov 8 1985 by wilhem roetgen
Identify the three major components of a dental x-ray machine - Answer-extension arm -
suspends tube head
houses the wires
yoke allows full movement
must be returned to original position
tube head -
protects the X-ray tube
PID -
prevents overheating
control planel
master switch and exposure settings
,Identify and explain the function of the five controls on the control panel - Answer-Line switch
On/off switch
milliampere (mA) selector
Usually preset
Determines the amount x-rays produced
kilovoltage (kVp) selector
Usually preset
Determines the penetrating power of the x-rays produced
Timer
How long the current passes through the X-ray tube
Exposure button
Activates the x-ray production A "dead man" switch
State the level of supervision required for exposing radiographs in UT - Answer-General
Identify risk management strategies - Answer-obtains radiographs fro previous office to avoid exposing
new images
use the best equipment available
Monitor exposure
pt communication
adopt ALARA as low as reasonably achievable
Respond to a patient exercising self-determination in declining radiographs - Answer-pt have the right
to decline radiographs
a dds cannot effectively diagnose
, document any refusals aka for liability reasons
Differentiate between the direct and indirect theories of biological
damage. - Answer-Direct
Cell is damaged directly
Direct hit of x-ray beam to cell
1/3 of interactions
2. Indirect-radiolysis
Indirect damage
X-ray beam damages water surrounding cell
Formation of toxins (hydrogen peroxide) and free radicals causes cellular dysfunction
Damage is not due to the x-ray photon it is a result of the free radicals
High likelihood of occurring (2/3) since we are 80% water.
List the details that must be documented in the patient's chart regarding
radiograph examination - Answer-date
number of retakes
type DIGITAL or FILM
Reson
results RADS must be red by DDS
Differentiate between a threshold dose-response curve and a nonthreshold dose-response curve. -
Answer-THRESHOLD
A response occurs only when a certain dose is hit
NONTHRESHOLD
A response will happen at ANY dose
Answers
radiology - Answer-study of x-rays
State when x-rays were discovered and by whom - Answer-nov 8 1985 by wilhem roetgen
Identify the three major components of a dental x-ray machine - Answer-extension arm -
suspends tube head
houses the wires
yoke allows full movement
must be returned to original position
tube head -
protects the X-ray tube
PID -
prevents overheating
control planel
master switch and exposure settings
,Identify and explain the function of the five controls on the control panel - Answer-Line switch
On/off switch
milliampere (mA) selector
Usually preset
Determines the amount x-rays produced
kilovoltage (kVp) selector
Usually preset
Determines the penetrating power of the x-rays produced
Timer
How long the current passes through the X-ray tube
Exposure button
Activates the x-ray production A "dead man" switch
State the level of supervision required for exposing radiographs in UT - Answer-General
Identify risk management strategies - Answer-obtains radiographs fro previous office to avoid exposing
new images
use the best equipment available
Monitor exposure
pt communication
adopt ALARA as low as reasonably achievable
Respond to a patient exercising self-determination in declining radiographs - Answer-pt have the right
to decline radiographs
a dds cannot effectively diagnose
, document any refusals aka for liability reasons
Differentiate between the direct and indirect theories of biological
damage. - Answer-Direct
Cell is damaged directly
Direct hit of x-ray beam to cell
1/3 of interactions
2. Indirect-radiolysis
Indirect damage
X-ray beam damages water surrounding cell
Formation of toxins (hydrogen peroxide) and free radicals causes cellular dysfunction
Damage is not due to the x-ray photon it is a result of the free radicals
High likelihood of occurring (2/3) since we are 80% water.
List the details that must be documented in the patient's chart regarding
radiograph examination - Answer-date
number of retakes
type DIGITAL or FILM
Reson
results RADS must be red by DDS
Differentiate between a threshold dose-response curve and a nonthreshold dose-response curve. -
Answer-THRESHOLD
A response occurs only when a certain dose is hit
NONTHRESHOLD
A response will happen at ANY dose
