Final; State of Ohio Regulations Flashcards
This is no less than 18cm if operable above 50kVp or 10cm if operable at 50kVp
source to skin distance of intraoral dental equipment
X-ray field at the minimum SSD shall be containable in a circle having a diameter of no more than what if operable at or above 50kVp
7cm
A means shall be provided to terminate exposure at which four qualities of the image receptor
time interval
product of current and time
number of pulses
radiation exposure
The operator shall be able to terminate the exposure at any during during an exposure of greater than what time
one-half second
The kVp accuracy shall be within +/- what percentage of the indicated value
10
For manual exposures, the accuracy of the timing device shall be within +/- what percentage of the indicated setting
10
Visual indication shall be provided whenever x-rays are produces; certified equipment also shall prove what to the operator while x-rays are produced or on termination of exposure
audible indication
The coefficient of variation for reproducibility of kVp, timing, and radiation exposure shall not excess what for four consecutive exposures
0.05
Intraoral and panoramic units shall be provided with primary barriers at all areas struck with what
the useful beam
When intraoral or panoramic units are in adjacent patient occupied rooms or areas, protective barrios shall be provided where
between the rooms or areas
Which individuals are permitted to hold any part of the x-ray tube housing, cone, or mechanical support of the x-ray tube during exposure
No individuals!!
Each installation shall be provided with a protective berried for the operator or shall be so arranged that the operator stands at a minimum distance of what from the patient and out of the useful beam
six feet
During panoramic radiography, when the operator is behind a protective barrier, a viewing system shall be provided large enough and so placed that the operator can see what
the patient without having to leave the protected area during exposure
Panoramic radiography; x-ray field shall be limited to the dimensions of what
the slit in the image receptor holder
This shall not be used for dental examinations
fluoroscopy
Hand-held radiation generating equipment shall be used for what only
intraoral purposes
Operators of the hand-held radiation generating equipment shall wear what
a full lead apron of not less than 0.25mm lead equivalent
This shall be in place during all hand-held radiographic exposures
back scatter shield
All operators of hand-held radiation generating equipment shall be provided and wear this on the hand holding the beam limiting device
personnel dosimeter; monitoring the dose to the operators hand
Dental equipment with a nominal fixed kVp of less than this shall not be used to make diagnostic radiographs of human beings
50
What did the NCRP #145 report released in Dec 2003 state
thyroid collar for children (and for adults)
ADA recommends lead aprons/thyroid collar for all patients
rectangular colimation
use E-speed or faster
rare earth screens for extra oral
shielding design is to be done by qualified expert
film badges for pregnant personnel
