NCRP stands for _______
National Council on Radiation Protection and Measurements
TRUE OR FALSE
The unborn child is known to be particularly sensitive to the effects of ionizing radiation.
TRUE
Proven by the principles of the Law of Bergonie and Tribondeau
(The less mature the cells, the more radiosensitive.)
What is the dose limit for the skin ?
a. 5 mSv/yr
b. 50 mSv/yr
c. 500 mSv/yr
D. 5,000 mSv/yr
The dose received by patients during diagnostic radiologic examinations is usually expressed in three (3) ways, mainly:
- Entrance Skin Exposure
- Organ Dose
- Fetal Dose
This pertains to the somatic effect of radiation exposure towards the bone marrow
Mean Marrow Dose (MMD)
What is the minimum total filtration required on all fluoroscopic x-ray tubes and radiographic tubes operating above 70 kVp ?
2.5 mmAl
It is the restriction of the useful x-ray beam to the anatomy being examined ?
Collimation
High kVp = ____ Contrast
Low Contrast
(HLLWM)
Safeguards against accidental fetal irradiation are particularly critical during the ______ of pregnancy
First Two (2) Months
TRUE OR FALSE
The speed of an IR does not influence patient dose.
FALSE
The speed of an IR GREATLY influences patient dose.
The following conditions are considered for application of gonadal shielding for patients EXCEPT:
a. When a patient is of reproductive age
b. When the gonads lie in or near the useful beam
c. When the use of gonadal shielding will not compromise the required diagnostic information
d. NOTA
d. NOTA
Enumerate the three (3) cardinal principles of radiation protection:
- Time
- Distance
- Shielding
OSL stands for ______
Optically-stimulated Luminescence Dosimetry
TLD stands for _______
Thermoluminescence Dosimetry
What is the annual dose for radiation workers ?
5 mSv (500 mrem)
Radiographers receive most of their occupational exposure during ______ and _____
- Fluoroscopy
- Portable Radiography
What is the dose limit for the hands in mSv ?
500 mSv/yr
During C-arm fluoroscopy, be sure the x-ray tube is _____ the patient
Below
What is the dose limit for the lens of the eye in mSv/yr ?
150 mSv/yr
ICRP stands for _____
International Commission on Radiological Protection
The source of occupational radiation exposure during fluoroscopy is the ______
Patient
It is a device that emits electrons when illuminated
Photocathode
Radiation-induced skin cancer follows a _________ relationship
Threshold-Dose Response Relationship
Which serves as the basis for the gamma camera in nuclear medicine and is used in the detector arrays of CT imaging system ?
Scintillation Detector
