Radiology CORE Exam Questions And
Answers With Verified Solutions Newly
Updated 2025 Pass With Ease!!!
What is the skin dose resulting in Early Transient Erythema? - ANSWER✔✔ 2Gy
What is the skin dose resulting in Temporary Epilation? - ANSWER✔✔ 3Gy
What is the skin dose resulting in Chronic Erythema (radiation burns)? -
ANSWER✔✔ 6Gy
In spin echo imaging, which gradient is changed with every repetition? -
ANSWER✔✔ Phase encoding gradient is changed with each repetition (TR).
What is the main determinant of CT hounsfield units? - ANSWER✔✔ Linear
attenuation coefficient
What is the skin dose resulting in Permanent Epilation? - ANSWER✔✔ 7Gy
What is the skin dose resulting in Telangiectasia? - ANSWER✔✔ 10Gy
What is the skin dose resulting in Dry Desquamation? - ANSWER✔✔ 13Gy
What is the skin dose resulting in Moist Desquamation (ulceration)? -
ANSWER✔✔ 18Gy
,What is the skin dose resulting in Secondary Ulceration? - ANSWER✔✔ 24Gy
How often is Processor QC done? - ANSWER✔✔ Daily
How often is Darkroom Cleanliness done? - ANSWER✔✔ Daily
How often is Viewbox Conditions done? - ANSWER✔✔ Weekly
How often is Phantom Evaluation done? - ANSWER✔✔ Weekly
How often is Repeat Analysis done? - ANSWER✔✔ Quarterly
How often is Compression Test done? - ANSWER✔✔ Semi-Annually
How often is Darkroom Fog done? - ANSWER✔✔ Semi-Annually
How often is Screen-Film Contrast done? - ANSWER✔✔ Semi-Anually
What is the Mean Glandular Dose limit for a breast phantom? - ANSWER✔✔
3mGy (grid), 1mGy (no grid)
What is the minimum Spatial Resolution required for screen-film mammography?
- ANSWER✔✔ 12 lp/mm
, What is the interval for Accreditation and Certification for mammography centers?
- ANSWER✔✔ 3 years
How long must mammography centers keep patient records? - ANSWER✔✔ 5
years
What are the Mammogram Training Requirements? - ANSWER✔✔ 240 exams in
6 months, 3 months of training, 60 hrs of mams education
What is the minimum energy for ionizing radiation? - ANSWER✔✔ 15eV
What is the K shell binding energy of Tungsten? - ANSWER✔✔ 69.5 KeV
How much mA and kVp are required to double Intensity of the X-ray Spectrum? -
ANSWER✔✔ 15%kVp, double mA
What is the relationship between focal spot and anode angle to the heel effect? -
ANSWER✔✔ Small anode angle results in a small effective focal spot but with an
increased Heel Effect.
What is the relationship between mA and kVp to effective focal spot? -
ANSWER✔✔ Increased mA results in "blooming" of focal spot, but increased
kVp results in focal spot "thinning"
What is the relationship between energy and atomic number (Z) to the
photoelectric effect? - ANSWER✔✔ Photoelectric effect dominates Compton
scatter at lower energies (20-30 KeV), and higher Z materials are much more likely
to have photoelectric effect (Z^2)3
Answers With Verified Solutions Newly
Updated 2025 Pass With Ease!!!
What is the skin dose resulting in Early Transient Erythema? - ANSWER✔✔ 2Gy
What is the skin dose resulting in Temporary Epilation? - ANSWER✔✔ 3Gy
What is the skin dose resulting in Chronic Erythema (radiation burns)? -
ANSWER✔✔ 6Gy
In spin echo imaging, which gradient is changed with every repetition? -
ANSWER✔✔ Phase encoding gradient is changed with each repetition (TR).
What is the main determinant of CT hounsfield units? - ANSWER✔✔ Linear
attenuation coefficient
What is the skin dose resulting in Permanent Epilation? - ANSWER✔✔ 7Gy
What is the skin dose resulting in Telangiectasia? - ANSWER✔✔ 10Gy
What is the skin dose resulting in Dry Desquamation? - ANSWER✔✔ 13Gy
What is the skin dose resulting in Moist Desquamation (ulceration)? -
ANSWER✔✔ 18Gy
,What is the skin dose resulting in Secondary Ulceration? - ANSWER✔✔ 24Gy
How often is Processor QC done? - ANSWER✔✔ Daily
How often is Darkroom Cleanliness done? - ANSWER✔✔ Daily
How often is Viewbox Conditions done? - ANSWER✔✔ Weekly
How often is Phantom Evaluation done? - ANSWER✔✔ Weekly
How often is Repeat Analysis done? - ANSWER✔✔ Quarterly
How often is Compression Test done? - ANSWER✔✔ Semi-Annually
How often is Darkroom Fog done? - ANSWER✔✔ Semi-Annually
How often is Screen-Film Contrast done? - ANSWER✔✔ Semi-Anually
What is the Mean Glandular Dose limit for a breast phantom? - ANSWER✔✔
3mGy (grid), 1mGy (no grid)
What is the minimum Spatial Resolution required for screen-film mammography?
- ANSWER✔✔ 12 lp/mm
, What is the interval for Accreditation and Certification for mammography centers?
- ANSWER✔✔ 3 years
How long must mammography centers keep patient records? - ANSWER✔✔ 5
years
What are the Mammogram Training Requirements? - ANSWER✔✔ 240 exams in
6 months, 3 months of training, 60 hrs of mams education
What is the minimum energy for ionizing radiation? - ANSWER✔✔ 15eV
What is the K shell binding energy of Tungsten? - ANSWER✔✔ 69.5 KeV
How much mA and kVp are required to double Intensity of the X-ray Spectrum? -
ANSWER✔✔ 15%kVp, double mA
What is the relationship between focal spot and anode angle to the heel effect? -
ANSWER✔✔ Small anode angle results in a small effective focal spot but with an
increased Heel Effect.
What is the relationship between mA and kVp to effective focal spot? -
ANSWER✔✔ Increased mA results in "blooming" of focal spot, but increased
kVp results in focal spot "thinning"
What is the relationship between energy and atomic number (Z) to the
photoelectric effect? - ANSWER✔✔ Photoelectric effect dominates Compton
scatter at lower energies (20-30 KeV), and higher Z materials are much more likely
to have photoelectric effect (Z^2)3
