MCQ on V/Q SCAN

520.All are used in ventilation scintigraphy of lung except
a. ^99mTc micro-aggregate albumin (MAA
b. krypton-81m
c. xenon-133
d.^99mTc-diethylenetriamine penta-acetic acid (DTPA)
 e. ‘technegas’


520.---a
Perfusion (Q) scintigraphy (to assess the distribution of pulmonary blood flow) is performed using injection of microparticles (10–100μm) of ^99mTc micro-aggregate albumin (MAA)


523.V/Q ‘mismatches’means

a.defects on perfusion imaging in regions that are normal on the ventilation study
b.defects on ventilation imaging in regions that are normal on the perfusion study
c.normal on perfusion imaging in regions that are also normal on the ventilation study
d.seen in pulmonary embolism with infarct
e. seen in obstructive airways disease


523.---a

Pulmonary artery hypertension

506. Pulmonary arterial size is said to be enlarged  if the transverse diameter of the right descending  artery at its midpoint is
a.greater than 16 mm.
b. greater than 17 mm
c. greater than 18 mm
d. greater than 15 mm
e. greater than 19 mm


506.---b
(CHAPTER 6 – Pulmonary Circulation and Pulmonary Thromboembolism,Adam: Grainger & Allison's Diagnostic Radiology, 5th ed)

KERLEY LINES

KERKEY LINES

496. All are true regarding Kerley B lines except

a.  1 cm or less in length
b. found predominantly in the mid  zones
c.peripheral location  and parallel to each other but
d.at right angles to the pleural surface
e. as a result of fluid accumulation in interlobular septa
496.----b            


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Kerley B lines are shorter (1 cm or less) interlobular septal lines, found predominantly in the lower zones peripherally, and parallel to each other but at right angles to the pleural surface. ( CHAPTER 26 – Pulmonary Circulation and Pulmonary Thromboembolism,Adam: Grainger & Allison's Diagnostic Radiology, 5th ed)


497. All are true regarding Kerley A lines except
a. approximately 4 cm in length
b.most conspicuous in the upper and mid portions of the lung.
c.deep septal lines (lymphatic channels) that radiate from the hila into the central portions of the lungs
d. do not reach the pleura.
e. normally indicates a less acute or less degree of oedema.
497.----e
Presence of Kerley A normally indicates a more acute or severe degree of oedema. ( CHAPTER 26 – Pulmonary Circulation and Pulmonary Thromboembolism,Adam: Grainger & Allison's Diagnostic Radiology, 5th ed)