Technology & Digital Applications Flashcards
7 cards from real CSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Technology & Digital Applications flashcards as text
Which CT acquisition strategy best minimizes radiation dose in cardiac CT angiography while maintaining diagnostic image quality?
Answer: Tube voltage reduction combined with iterative reconstruction
Reducing tube voltage (e.g., 100 kVp) lowers radiation dose, and iterative reconstruction algorithms compensate for the resulting increase in image noise.
In cardiac MRI, which sequence is considered the gold standard for assessing myocardial viability?
Answer: Late gadolinium enhancement (LGE)
LGE detects gadolinium accumulation in fibrotic or infarcted myocardium, making it the gold standard for viability assessment.
The primary benefit of attenuation correction in SPECT myocardial perfusion imaging is to:
Answer: Reduce false-positive defects caused by soft tissue attenuation artifacts
Attenuation correction reduces artifactual perfusion defects caused by breast or diaphragm attenuation, improving specificity.
Compared to 2D biplane Simpson's method, 3D full-volume echocardiographic LVEF measurement offers which primary advantage?
Answer: Better agreement with cardiac MRI due to elimination of geometric assumptions
3D full-volume LVEF does not rely on geometric assumptions about ventricular shape, yielding better correlation with cardiac MRI reference values.
Intravascular ultrasound (IVUS) is most clinically useful for which purpose during percutaneous coronary intervention?
Answer: Optimizing stent deployment and confirming full stent apposition
IVUS provides cross-sectional images of the vessel lumen and wall, allowing assessment of stent expansion, apposition, and detection of edge dissections.
A fractional flow reserve (FFR) value of 0.75 across a coronary lesion indicates:
Answer: A hemodynamically significant lesion where revascularization is likely beneficial
FFR ≤0.80 defines hemodynamic significance; a value of 0.75 is clearly below the threshold, indicating revascularization is likely to reduce ischemia and improve outcomes.
In electroanatomic mapping during ventricular tachycardia ablation, voltage mapping primarily identifies:
Answer: Areas of low-voltage scar that serve as arrhythmia substrate
Low bipolar voltage (<1.5 mV) in voltage maps identifies myocardial scar, which provides the substrate for reentrant ventricular tachycardia.