Variants and artifacts Flashcards
1
Q
Sensitivity
A
70-90%
2
Q
Specificity
A
50-90%
3
Q
False negatives
A
Earlier or delayed redistribution
Sub-maximal exercise
Non-critical stenosis
Small ischemic area
Isolated RCA lesion
Coronary collaterals
Multi-vessel disease
Overestimation of stenosis on angiogram
Interfering medication
4
Q
True defects
A
Coronary anomaly
Coronary conduction
Non-coronary disease
5
Q
Apparent defects
A
- artifacts
- excess patient motion
- misinterpretation of normal variants
6
Q
attenuation artifacts
A
Obesity
Appearance & correction
Ant or lat wall
Diaphragm
Appearance & correction
Inferior wall
Prone or upright imaging
Breast
Appearance & correction
Ant & lat wall
Assess CINE for breast shadow
Attenuation
Correction!
