第八章单元测试
- In general how many capillaries are blocked when a perfusion lung scan using 99mTc is performed? （ ）
- During a lung perfusion study, activity is noted in the head and in the area of the kidneys. This represents: （ ）
- Which radiopharmaceutical will be most useful in detecting delayed washout in a patient with COPD? （ ）
- A perfusion lung scan shows a cold defect in the right base. If the ventilation study for the same patient is normal, what is the most probable explanation for the defect? （ ）
- The most frequent application of the lung ventilation/perfusion(V/Q) scan is:( )
A:none of the above
B:fewer than 1 in 1000
C:＜ 0.1%
D:both a and b
答案:fewer than 1 in 1000
A:right to left shunt
B:free technetium in the MAA
C:incorrect particle size
D:probable metastases
A:99mTc DTPA
B:99mTc MAG3
C:99mTc MAA
D:81mKr
E:133Xe
A:pulmonary embolism
B:pacemaker
C:attenuation from the heart
D:COPD
A:pulmonary embolis
B:pneumonia
C:pulmonary hypertension
D:bronchogenic carcinoma
E:pulmonary emphysema
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