TOK radiation protection Flashcards
A radiation exposure incident must be reported to the Health and Safety Executive when
An employer suspects or has been informed that an overexposure has occurred. An employer suspects or has been informed that a person, while undergoing a medical exposure, was exposed to ionising radiation to a much greater extent than intended, as the result of a malfunction or defect in radiation equipment.
Radiological local rules should recommend which of the
following
Give contact details of the RPA Name the RPA Identify and describe the controlled area following consultation with the RPA
Except in special cases, under IRR 2017, the maximum
annual effective dose for employees aged 18 years or over
is:
20mSv
Under which of the following circumstances are Personal
Dosimeters a requirement in practice?
If the operator takes more than 50 panoral films per week If the operator takes more than 100 intra oral films per week
Which of the following statements is correct?
With guidance from the radiation protection advisor, it is permissible for family members to support patients with additional needs when taking radiographs
When exposing a radiograph the minimum recommended
distance for the operator from the source of ionising
radiation is:
1.5m
For Dental Radiography the Medical Physics Expert (MPE)
must have a BDS (Dental) qualification. True or False?
False
The local rules for each x-ray machine should include the
contact details of all the responsible people
Employer, Radiation protection supervisor, Radiation protection adviser
Radiation dose to the patient can be reduced by which of
the following methods?:
Digital radiography Quality assured processing Increasing film speed Rectangular collimation
It is recommended that the quality ratings of radiographs
are regularly analysed to determine the percentage of the
total images produced that are categorized as A or N. The
target percentages of images rated as diagnostically
acceptable for digital images is
Not less than 95%
According to IRMER regulations, the practice owner is
responsible for?:
Notifying Health and Safety Executive of the use of X-Ray equipment Organising Staff Training Appointing a radiation protection supervisor (RPS) Written procedures for patient protection
Which of the following are classified as ‘Operators’ under
IRMER 2017 Regulations?
A dentist who pushes the button on the x-ray machine A trainee Dental Nurse who processes the radiographs
As part of the justification process you should consider the
following before an exposure takes place.
The availability and findings of previous radiographs. The age of the individual. The total potential diagnostic benefit to the patient. The radiation risk associated with the radiographic examination.
Which of the following health and safety check should you
do on a day to day basis on your x-ray machine?
Which of the following routine maintenance checks should
you carry out on a regular basis
Audible alarms. The counterbalance for maintaining the position of the x-ray tube. Warning lights.
The annual effective dose limit in IRR 2017 for any employee aged 18 years or over is:
20mSv per annum.
The ‘Controlled Area’ is normally defined as…
In the primary beam of the x-ray tube and within 1.5 meters of the x-ray tube and the patient The entire room where radiographs are taken, wherever possible
If the exposure control fails, causing continuous
generation of x-rays should you:
Switch off the mains supply immediately Inform the RPS/Legal Person
Routine testing and maintenance of the x-ray unit:
Should be carried out as part of your practice’s quality assurance programme and following any major maintenance. Should be recorded and contained in the Radiation Protection File.
With regard to the Radiation Protection Advisor (RPA),
local rules should always recommend which of the
following?:
Identify and describe the controlled area following consultation with the RPA Give contact details of the RPA Name the RPA
Which of the following statements are true? The radiation
protection adviser…
Is consulted to advise on compliance with the regulations and all aspects of radiation protection Is appointed in writing
Under what circumstances should the Health and Safety
Executive be informed that a practice uses radiation
equipment?
A practice is initially set up A practice changes ownership A practice moves premises
Which of the following must be included in the IR(ME)R
Written Procedures required by all dental practice
employers?
Training and education Justification and authorization Audit Diagnostic reference levels Clinical education/evaluation
In relation to dental radiography, Which of the following
are true?:
The justification for taking a radiograph should always be recorded in the notes Audit should be used to maintain the quality of radiographs A quality assurance system should be used to monitor the processing of exposed radiographic films
When an incident occurs due to a defect or malfunction of
X-ray equipment, which of the following are true?:
The local office of the Health and Safety Executive office should be informed The equipment manufacturer should be informed An investigation must be carried out in conjunction with the RPA
Patient protection from ionising radiation is best achieved
by the use of?:
Rectangular collimation Only E/F speed films
Reduced dose from ionising radiation can be achieved by the use of
Beam aiming devices
Digital radiography (2nd question
IR(ME)R 2017 provide protection to whom?
Patients
In defining the controlled area for radiation protection,
which of the following are true?
The controlled area only comes into being whilst x-rays are being generated No shielding is required for the operator if she/he can stand 2m from the tube head and out of the line of the primary beam. In the line of the primary beam, the controlled area extends until the beam is attenuated by distance or solid object.
Ionising Radiation Regulations 2017 that came into force
1st January 2018
For existing practices, registration was compulsory by 5th Feburary 2018
Which is the most appropriate way of checking whether
the film processing chemicals for radiographs need to be
changed?
By checking daily by processing a test object exposure and comparing it to your standard test object film
When should a ‘critical examination and acceptance test’
of radiographic equipment be carried out?
When installing radiographic equipment When relocation radiographic equipment
When is the use of a lead apron advised, for patient use,
when taking dental x-rays?
Not routinely required
The x-ray arm in your surgery has started to move from
position after you have set up to take a radiograph and
you, or the patient need to steady the arm to allow the
radiograph to be taken. Should you:
Ask the practice manager to arrange the engineer to visit Mention to the practice principle and practice manager so that the repair is added to the next scheduled engineer visit Stop using the equipment and make alternative arrangements for your patients
What is the minimum radiological workload before badge
monitoring is mandatory
Weekly workload exceeding 100 intra-orals or 50 panoramic
