RHS DANB EXAM
Comprehensive Questions
(Frequently Tested) with
Verified Answers Graded A+
ALARA - Answer: As Low As Reasonably Achievable
Acute Radiation Syndrome (ARS) - Answer: Symptoms of short term radiation effects after a
massive dose of ionizing radiation
Symptoms of ARS - Answer: Erythema,nausea, vomiting,diarrhea,hemorrhage,hair loss
Latent period - Answer: maybe very short or extremely long
short term effects:mins,days,wks
long term effects: years,decades,generations
depends on the rates of mitosis
What is Collimation? - Answer: controls the size and shape of the useful beam
Rectangular collimators reduces scatter by - Answer: 70%
, 2 important functions of Collimation are? - Answer: 1.reduces radiation dose to the patient by
reducing the volume of tissue exposed
2.reduces scatter radiation that causes poor contrast of the radiograph
PID shape indicates - Answer: the shape of the collimator
3 speeds of intraoral film - Answer: D Speed (slowest)
E Speed (twice as fast a D)
F Speed (fastest)
What is the Lead Apron Made of? - Answer: 0.25mm of lead
how is radiation leakage dangerous? - Answer: it can expose the operator to a significant
amount of radiation
shielding? - Answer: provides protection from potential scattered radiation
how far should the operator be from the head of the patient? - Answer: at aleast 6ft away
Personnel Monitoring? - Answer: film badge,TLD,OSL,DIS
they measure the amount of radiation the operator is getting
what does MPD mean? - Answer: Maximum Permissible Dose
MPD? - Answer: the dose equivalent of ionizing radiation that, in light of present knowledge, is
not expected to cause detectable body damage to avg persons during their lifetime
Comprehensive Questions
(Frequently Tested) with
Verified Answers Graded A+
ALARA - Answer: As Low As Reasonably Achievable
Acute Radiation Syndrome (ARS) - Answer: Symptoms of short term radiation effects after a
massive dose of ionizing radiation
Symptoms of ARS - Answer: Erythema,nausea, vomiting,diarrhea,hemorrhage,hair loss
Latent period - Answer: maybe very short or extremely long
short term effects:mins,days,wks
long term effects: years,decades,generations
depends on the rates of mitosis
What is Collimation? - Answer: controls the size and shape of the useful beam
Rectangular collimators reduces scatter by - Answer: 70%
, 2 important functions of Collimation are? - Answer: 1.reduces radiation dose to the patient by
reducing the volume of tissue exposed
2.reduces scatter radiation that causes poor contrast of the radiograph
PID shape indicates - Answer: the shape of the collimator
3 speeds of intraoral film - Answer: D Speed (slowest)
E Speed (twice as fast a D)
F Speed (fastest)
What is the Lead Apron Made of? - Answer: 0.25mm of lead
how is radiation leakage dangerous? - Answer: it can expose the operator to a significant
amount of radiation
shielding? - Answer: provides protection from potential scattered radiation
how far should the operator be from the head of the patient? - Answer: at aleast 6ft away
Personnel Monitoring? - Answer: film badge,TLD,OSL,DIS
they measure the amount of radiation the operator is getting
what does MPD mean? - Answer: Maximum Permissible Dose
MPD? - Answer: the dose equivalent of ionizing radiation that, in light of present knowledge, is
not expected to cause detectable body damage to avg persons during their lifetime
