EACVI CARDIAC COMPUTED TOMOGRAPHY (CCT) CERTIFICATION EXAM READY - VERIFIED QUESTIONS AND ANSWERS - COMPREHENSIVE LATEST VERSION

1. What is the typical radiation dose for a coronary CTA using
prospective triggering?
o A) 15-20 mSv
o B) 10-15 mSv
o C) 1-5 mSv
o D) 25-30 mSv
ANSWER : C) 1-5 mSv
2. Which technique reduces radiation dose the most in cardiac CT?
o A) Increased tube voltage
o B) Prospective ECG triggering
o C) Longer scan time
o D) Higher pitch values in retrospective gating
ANSWER : B) Prospective ECG triggering
3. The effective dose from cardiac CT is typically measured in:
o A) Gray (Gy)
o B) Sievert (Sv)
o C) Roentgen (R)
o D) Coulomb/kg
ANSWER : B) Sievert (Sv)
4. What is the principle behind iterative reconstruction?
o A) Single-pass image reconstruction

, o B) Multiple iterations to reduce noise
o C) Increasing radiation dose
o D) Reducing scan time only
ANSWER : B) Multiple iterations to reduce noise
5. Tube current modulation in cardiac CT:
o A) Keeps constant radiation throughout the cardiac cycle
o B) Increases radiation during systole
o C) Reduces radiation during systole
o D) Has no effect on dose
ANSWER : C) Reduces radiation during systole
6. What is the typical temporal resolution of modern dual-source CT
scanners?
o A) 250-300 ms
o B) 150-175 ms
o C) 66-83 ms
o D) 500 ms
ANSWER : C) 66-83 ms
7. The detector pitch in cardiac CT refers to:
o A) Table feed per rotation divided by beam width
o B) Tube voltage
o C) Temporal resolution
o D) Spatial resolution
ANSWER : A) Table feed per rotation divided by beam width
8. Which factor most affects temporal resolution in single-source CT?
o A) Tube voltage
o B) Gantry rotation time
o C) Detector size
o D) Patient size

,ANSWER : B) Gantry rotation time
9. The main advantage of dual-source CT is:
o A) Lower cost
o B) Improved temporal resolution
o C) Reduced contrast volume
o D) Smaller scanner size
ANSWER : B) Improved temporal resolution
10.What is the typical spatial resolution of cardiac CT?
o A) 0.1-0.2 mm
o B) 0.5-0.7 mm
o C) 1.0-1.5 mm
o D) 2.0-3.0 mm
ANSWER : B) 0.5-0.7 mm
Image Acquisition
11.The optimal heart rate for coronary CTA with single-source scanner
is:
o A) 90-100 bpm
o B) 75-85 bpm
o C) <65 bpm
o D) >100 bpm
ANSWER : C) <65 bpm
12.Beta-blockers before cardiac CT are used to:
o A) Increase heart rate
o B) Improve contrast opacification
o C) Reduce heart rate and variability
o D) Prevent arrhythmias only
ANSWER : C) Reduce heart rate and variability
13.The typical tube voltage for cardiac CTA in average-sized patients is:

, o A) 80 kV
o B) 100 kV
o C) 120 kV
o D) 140 kV
ANSWER : C) 120 kV
14.Lower tube voltage (80-100 kV) in cardiac CT:
o A) Reduces contrast enhancement
o B) Increases radiation dose
o C) Improves contrast enhancement and reduces dose
o D) Has no effect on image quality
ANSWER : C) Improves contrast enhancement and reduces dose
15.Retrospective ECG gating allows:
o A) Lowest radiation dose
o B) Functional assessment
o C) Fastest scan time
o D) No cardiac motion artifacts
ANSWER : B) Functional assessment
16.The typical contrast injection rate for coronary CTA is:
o A) 1-2 mL/s
o B) 3-4 mL/s
o C) 5-6 mL/s
o D) 8-10 mL/s
ANSWER : C) 5-6 mL/s
17.Bolus tracking in cardiac CT typically uses a threshold of:
o A) 50 HU in the ascending aorta
o B) 100 HU in the descending aorta
o C) 150 HU in the ascending aorta