Which camera type has the greatest lag? - Correct Answer vidcom
This personnel monitoring device discharges a capacitor by the ionization of air when in the presence of
radiation:
a) Audible warning device.
b) Thermoluminescent Dosimeter.
c) Pocket chamber.
d) Pocket ionization chamber. - Correct Answer c) Pocket chamber, and.
d) Pocket ionization chamber.
Explanation:
Pocket ionization chambers discharge a capacitor by ionization of air within a chamber when in the
presence of ionizing radiation. The self-reading versions allow immediate reading of radiation exposure
by the operator.
The following may cause long-term effects from radiation exposure:
a) Prior low-dose exposure (<25 rads).
b) Prior high-dose exposure.
c) Chronic low-dose exposure over years. - Correct Answer Prior high-dose exposure, and.
Chronic low-dose exposure over years.
,Explanation:
Long-term effects may result from high-dose exposures or chronic low-dose exposures. Exposure to 25
rads or less of radiation is not thought to cause injury.
In California, how frequently must tube potential k.V.p. and current m.A. must be monitored? - Correct
Answer Weekly
This area is defined as one in which an individual could receive a dose equivalent greater than 1 m.S.v. in
1 hour. - Correct Answer High Radiation Area
Explanation: A "high radiation area" is one in which there exists radiation levels that could result in an
individual receiving a dose equivalent in excess of 1 m.S.v. in 1 hour at 30 cm from the radiation source.
If you decrease the target-to-panel distance for patients, Patients dose is: - Correct Answer Increase.,
Explanation: The target is the origin of the x-ray beam. Decreasing the target-to-panel distance puts the
patient closer to the x-ray beam source. Patient dose is inversely proportional to the target-to-panel
distance, such that decreasing this distance increases the patient dose.
What documentation is necessary in order to expose human beings to X-rays for diagnostic purposes? -
Correct Answer I. Technologist fluoroscopy permit.
II. Supervisor and Operator radiology certificate.
III. Supervisor and Operator fluoroscopy permit.
Explanation: Only persons who possess proper, valid, and up-to-date Supervisor and Operator Radiology
certificates, Supervisor and Operator Fluoroscopy permits or Technologists Fluoroscopy permits issued
by the State.
How many horizontal lines do television monitors typically have? - Correct Answer 525 lines
Explanation:
Horizontal scan lines represent the total number of lines in a picture and is generally fixed at 525 lines.
This number is independent of television size.
,Which of the following diseases was seen in early radiologists?
Kidney cancer.
Leukemia.
Osteosarcoma.
Neuroblastoma. - Correct Answer Leukemia
Explanation:
Early radiologists manifested a significant increase in skin malignancies and leukemias.
Scatter radiation could be as high as 500 millirads per hour at how far from the patient.
6 inches
1 foot
3 feet
6 feet - Correct Answer 1 foot
Explanation:
At 1 foot from the patient typical exposure can be as high as 500
How thick (in lead equivalent) must protective curtains be?
, 0.25 mm
0.5 mm
2.0 mm
5 mm - Correct Answer 0.25 mm
Explanation:
Protective curtains must be at least 0.25 mm lead equivalent and should be positioned between the
patient and the fluoroscopist.
According to the National Council on Radiation Protection and Measurements (NCRP), how many days
after the onset of menses is it safest to perform x-rays?
Greater than 2 weeks
10-14 days
0-5 days
6-9 days - Correct Answer 10 to 14 days
Explanation:
According to the N.C.R.P. , 10 to 14 days after the onset of menses it is improbable that a woman would
be pregnant and so this is the safest time to perform x-ray examinations.
The smallest element of a digital image is known as a:
Matrix
This personnel monitoring device discharges a capacitor by the ionization of air when in the presence of
radiation:
a) Audible warning device.
b) Thermoluminescent Dosimeter.
c) Pocket chamber.
d) Pocket ionization chamber. - Correct Answer c) Pocket chamber, and.
d) Pocket ionization chamber.
Explanation:
Pocket ionization chambers discharge a capacitor by ionization of air within a chamber when in the
presence of ionizing radiation. The self-reading versions allow immediate reading of radiation exposure
by the operator.
The following may cause long-term effects from radiation exposure:
a) Prior low-dose exposure (<25 rads).
b) Prior high-dose exposure.
c) Chronic low-dose exposure over years. - Correct Answer Prior high-dose exposure, and.
Chronic low-dose exposure over years.
,Explanation:
Long-term effects may result from high-dose exposures or chronic low-dose exposures. Exposure to 25
rads or less of radiation is not thought to cause injury.
In California, how frequently must tube potential k.V.p. and current m.A. must be monitored? - Correct
Answer Weekly
This area is defined as one in which an individual could receive a dose equivalent greater than 1 m.S.v. in
1 hour. - Correct Answer High Radiation Area
Explanation: A "high radiation area" is one in which there exists radiation levels that could result in an
individual receiving a dose equivalent in excess of 1 m.S.v. in 1 hour at 30 cm from the radiation source.
If you decrease the target-to-panel distance for patients, Patients dose is: - Correct Answer Increase.,
Explanation: The target is the origin of the x-ray beam. Decreasing the target-to-panel distance puts the
patient closer to the x-ray beam source. Patient dose is inversely proportional to the target-to-panel
distance, such that decreasing this distance increases the patient dose.
What documentation is necessary in order to expose human beings to X-rays for diagnostic purposes? -
Correct Answer I. Technologist fluoroscopy permit.
II. Supervisor and Operator radiology certificate.
III. Supervisor and Operator fluoroscopy permit.
Explanation: Only persons who possess proper, valid, and up-to-date Supervisor and Operator Radiology
certificates, Supervisor and Operator Fluoroscopy permits or Technologists Fluoroscopy permits issued
by the State.
How many horizontal lines do television monitors typically have? - Correct Answer 525 lines
Explanation:
Horizontal scan lines represent the total number of lines in a picture and is generally fixed at 525 lines.
This number is independent of television size.
,Which of the following diseases was seen in early radiologists?
Kidney cancer.
Leukemia.
Osteosarcoma.
Neuroblastoma. - Correct Answer Leukemia
Explanation:
Early radiologists manifested a significant increase in skin malignancies and leukemias.
Scatter radiation could be as high as 500 millirads per hour at how far from the patient.
6 inches
1 foot
3 feet
6 feet - Correct Answer 1 foot
Explanation:
At 1 foot from the patient typical exposure can be as high as 500
How thick (in lead equivalent) must protective curtains be?
, 0.25 mm
0.5 mm
2.0 mm
5 mm - Correct Answer 0.25 mm
Explanation:
Protective curtains must be at least 0.25 mm lead equivalent and should be positioned between the
patient and the fluoroscopist.
According to the National Council on Radiation Protection and Measurements (NCRP), how many days
after the onset of menses is it safest to perform x-rays?
Greater than 2 weeks
10-14 days
0-5 days
6-9 days - Correct Answer 10 to 14 days
Explanation:
According to the N.C.R.P. , 10 to 14 days after the onset of menses it is improbable that a woman would
be pregnant and so this is the safest time to perform x-ray examinations.
The smallest element of a digital image is known as a:
Matrix
