Radiation Protection - Chapter 12 Exam Questions and Answers With Verified
Solutions 2025
Alternative procedure to the use of radiographic grid for reducing scattered radiation; - ✔✔Air gap
technique
Give a brief description of how the air gap works: - ✔✔This technique removes scatter radiation by using
an increased OID receptor distance. Low energy X-rays get absorbed by the air.
The use of an air gap technique requires the selection of technical exposure factors that are comparable
to those used with an ______ ratio grid. - ✔✔8:1
Air gap techniques are not as effective when kVp settings are _____ or above. - ✔✔90
Name (6) unnecessary radiologic procedures; - ✔✔1. CXR on admission to hospital
2. CXR as part of pre-employment
3. CXR as part of routine check-up
4. CXR for TB screening
5. L-Spine as part of pre-employment
6. Whole body CT screenings
The amount of radiation (during xrays) received by a patient may be specified in (3) ways. What are
they? - ✔✔1. Entrance Skin Exposure (ESE)
2. Bone marrow Dose
3. Gonadal dose
Why is entrance skin exposure (ESE) the most frequently used method for determining radiation
received by patients? - ✔✔It is the simplest to determine
The sensing devices most often used to measure skin dose directly: - ✔✔Thermoluminescent dosimeters
(TLD)
Solutions 2025
Alternative procedure to the use of radiographic grid for reducing scattered radiation; - ✔✔Air gap
technique
Give a brief description of how the air gap works: - ✔✔This technique removes scatter radiation by using
an increased OID receptor distance. Low energy X-rays get absorbed by the air.
The use of an air gap technique requires the selection of technical exposure factors that are comparable
to those used with an ______ ratio grid. - ✔✔8:1
Air gap techniques are not as effective when kVp settings are _____ or above. - ✔✔90
Name (6) unnecessary radiologic procedures; - ✔✔1. CXR on admission to hospital
2. CXR as part of pre-employment
3. CXR as part of routine check-up
4. CXR for TB screening
5. L-Spine as part of pre-employment
6. Whole body CT screenings
The amount of radiation (during xrays) received by a patient may be specified in (3) ways. What are
they? - ✔✔1. Entrance Skin Exposure (ESE)
2. Bone marrow Dose
3. Gonadal dose
Why is entrance skin exposure (ESE) the most frequently used method for determining radiation
received by patients? - ✔✔It is the simplest to determine
The sensing devices most often used to measure skin dose directly: - ✔✔Thermoluminescent dosimeters
(TLD)
