Rad Prot Unit 4 Word Scramble

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Rad Prot Unit 4

Personnel Protection

Question	Answer
Annual EfD limits for radiation workers: ______ mSv / _____ Rem	50 mSv; 5 Rem
Annual EfD limits for Non-radiation workers = _____: _______ mSv / _________ Rem	1/10; 5mSv; .5 Rem
What are 4 imaging procedures that increase the Radiographer's risk of exposure?	1. General Fluoroscopy 2. Interventional Procedures that employ hi level control Fluoroscopy 3. Mobile Exams 4. C-Arm Fluoroscopy
C-Arm Fluoroscopy are generally performed in what setting?	Surgery
These are located ⊥ (perpendicular) to the line of the primary beam:	Primary Barriers
Give 4 examples of Primary Barriers:	1. Chest Wall in an R & F room 2. Door 3. Floor 4. Lateral Walls
This provides protection for secondary radiation only and is parallel to the direction of the primary beam:	Secondary Barrier
What are 2 examples of secondary barriers:	Control Booth Any wall in CT Room
Primary Barriers must be how thick and how high?	1/16" Pb (lead) equivalent 7 Feet High
Secondary Barriers must be how thick? Must overlap the primary barrier by how much?	1/32" Pb Equivalent; 1/2 " overlap
Control booths must be designed so that diagnostic x-rays must scatter _______ times before reaching any area behind this barrier.	Two times
Control booth windows must be how thick?	1.5 mm Pb equivalent
What is the maximum allowable leakage from the Tube Housing?	100 mR/hr at a distance of 1 meter
What type of switch terminates the exposure if the operator becomes incapacitated?	Dead Man Switch
Protective drapes must be how thick and what should the dimensions be?	.25 mm Pb eq; 45cm x 45 cm
What type of shielding device is .25 mm Pb eq and provides gonadal shielding?	Bucky Slot Cover
What are 4 techniques to use to minimize your exposure during a fluoroscopic procedure?	1. Stand as far away as possible 2. Stand behind the Radiologist 3. Back out of the fluoro room (apron not closed in back) 4. Treat yourself like a loaded cassette
For Fixed Radiographic units, if there is an exposure control cord, how long or short should it be and if there is no cord, where might the exposure control switch be located?	Must be short enough to be operated from behind the control booth. If no cord, exposure control switch is most likely on the control panel
On Mobile Radiographic units, how long must the exposure control switch be and what must the radiographer ALWAYS wear?	Control switch allow the radiographer to stand a minimum of 2 meters (6 feet/ 72 inches) away. ALWAYS wear a lead apron
Technicians should NEVER stand in the ___________ ____________.	Primary Beam
What 2 things can be used to hold patients:	Non-occupational individuals or restraints
What is the Maximum Permissible Dose (MPD) for technologist per year: ____ mSv / ____ rem	50mSv / 5 rem
What is the Maximum Permissible Dose (MPD) for technologists per week: _____ mSv / ____ rem :_____ mRem	1 mSv / 0.1 Rem / 100 mRem
ALARA: What does it stand for?	As Low As Reasonably Achievable
What are the 3 highest occupational exposure forms (FMS):	Fluoroscopy, Mobile Radiography, Special Procedures
What should be implemented among departmental radiography workers because of high exposure procedures?	Rotational scheduling
Formula for solving for exposure intensity and distance variations:	INTENSITY 1/ INTENSITY 2= DISTANCE 2 (squared)/ DISTANCE 1 (squared)
In Lead Thickness Requirements: 1) Lead Aprons 2) Lead Gloves 3) Eye Glasses 4) Neck & Thyroid Shield	1) 0.25 mm Pb eq 2) 0.25 mm Pb eq 3) 0.35 mm Pb eq 4) 0.50 mm Pb eq
What is the lead thickness of the most common type of lead apron used? And how much protection does it provide?	0.50 mm Pb eq; 88% attenuation @ 75 Kv
According to the NCRP where should dosimeters be worn?	Where a qualified expert tells you
General rule of thumb, where should dosimeters be worn?	At the collar, outside of the apron
When performing radiographic procedures, where should the radiographer stand in relation to the scattering objects?	At right angles
What is the intensity of the scatter radiation 1 meter from the patient?	0.1% of the intensity of the useful beam at the patient
What could happen within the first 2 weeks of pregnancy for the pregnant worker?	Reabsorption of the embryo (spontaneous abortion - most people don't know)
What is a possibility that occur for the pregnant worker between the 2nd and 8th week of pregnancy?	Major organogenesis (organ deformities - mainly skeletal)
What is the most radiosensitive trimester and what could happen during this time?	First trimester; leukemia or other cancers
What is the most resistant stage of pregnancy?	3rd trimester
For a declared pregnant worker, what is the minimum exposure that could cause a 1% increase in congenital abnormality?	10 rad
After a 10 rad exposure to a pregnant worker how much of an increase in the possibility of congenital abnormalities could follow?	1% increase
True or False: A pregnant worker must immediately notify their supervisor after discovering that she is pregnant to begin taking extra precautions required during gestation.	False (Should but not required to notify the supervisor)
Fetal exposure must remain below _____ mRem / ____ mSv during the entire gestation period.	500mRem/ 5mSv
The exposure for the pregnant worker must not exceed ______ mSv per month. (____mRem)	0.5 mSv (50mRem)
If your exposure is 200mR at 15", what would your exposure be at 40"?	28mR
If your exposure at 72" is 75mR, what would your exposure be at 40"?	243mR
During mammography, the minimal filtration required for values less than 30kVp is _____ mm Al eq.	.5
What is the minimum permissible filtration for general purpose radiographic or fluoroscopic tubes is _____ mm Al	2.5
Why should fluoroscopic tubes not be positioned any closer than 38 cm (14.96")?	Excessive patient dose
What is regulated in controlled areas?	Public Access
Radiographic work load (W) is measured in what units?	mAmin/wk
What is the average radiographic workload in a busy R & F room?	500mAmin/wk
What area of the hospital should have the highest occupancy factor (T)?	Laboratory
Control booth: considered primary or secondary barrier?	Secondary
The walls of a CT room are considered what type of barrier?	secondary
The design limit for exposure of occupants in controlled areas is ______mRem/wk	100mRem/wk
A test to ensure that radiation intensity is doubled when radiographic mA is doubled is called a test of _________.	Linearity
What is the approximate ANNUAL exposure received by radiologic technologists?	50mRem
In a personnel monitoring report, what is usually of the highest reading?	Whole Body Dose

Created by: foster1317 on 2012-05-31