xray Core Flashcards
Since the greatest risk to the unborn child is during a time when the mother may not realize she is pregnant, some recommend non emergency exams shall be done only:
During the first 10 days of the menstrual cycle.
A Minimum lead thickness for the equivalent required for gloves is
0.25mm
the unit of absorption in matter is
Gy-T
What is the distance the operator should be from the patient and the X ray tube during exposure.
6 feet
What is considered to be possible long-term effect of exposure to radiation ?
Cataracts it occurs 10-15 years
A type of ionizing radiation that is more likely to produce effects would be one with.
high relative biologic effectiveness (RBE)
The current occupational dose limit is
50 mSv per year
What cell us considered the be the most sensitive to radiation
Lymphocytes
After a whole body dose of about 3 Sv what percentage of people expected to die with 30-60 days.
50% this is known as the LD 50/60 the lethal dose is 50 % of exposed people in 30-60 days.
Occupationally exposed individuals shroud never place themselves in the position to be exposed by:
The Primary beam
Scatter radiation increases with the volume of tissue exposed and can be effectively reduce by
Reducing the beam size
According to the NCRP report #160 the annual exposure for all medical sources in 2006 was 48% of total exposure in the US as of 2017 the exposure for medical sources of radiation for the average American is
Greater than 50
One of the late long-term somatic effects of radiation that may take 5–30 years to become apparent is
cataracts
What is the Anode heel affect ?
What is the Anode ?
The Anode is the positive
What is the cathode ?
The Cathode is the Negative
to prevent leakage radiation from exposing the patient from the x ray tube how much lead must be used to protect the patient ?
lead 2.5mm
What government is responsible for governing the use of radiation
Food and Drug administration
Which reports of the national council on radiation protection measurement lists recommendation for dose limit ?
116
What is called when the x ray beam after it has passed through the beam restricted device ?
Primary beam
Which one of the radiation monitors is considered to be the most accurate
OSL Optically simulated luminescence dosimeter
How often should a personal radiation monitor devices be changed
Monthly
what is the fraction the personal monitoring is required for an individual to received ?
1/10
Which of the following monitor devices is providing an immediate reading
Pocket dosimeter
Which one of the types of radiation is most ionizing and Which ones are least
Most - Alpha
Least- Gamma and X-rays
Which agency requires the formation of a radiation safety committee ?
NRC Nuclear regulatory commission
Leakage radiation from the x ray tube cannot exceed which of the follow at a distance of one meter ?
1mGy/hr/meter
Total tube filtration is the combination of inherent filtration of ?
Added Filtration
What is used with aluminum oxide to detect radiation ?
Optically stimulated luminescence dosimeter
