Diagnostic Imaging

Question 1

Advantages of X-ray

Answer 1

quick, cheap, accessible

minimal radiation

Question 2

Disadvantages of X-ray

Answer 2

poor detail
two-dimensional
some radiation
minimal portability

Question 3

Ultrasound advantages

Answer 3

excellent real time images
no radiation
relatively cheap, portable machines available

Question 4

Ultrasound disadvantages

Answer 4

operator dependent results
still image not as good as moving image
gas/air causes poor image

Question 5

FAST scans

Answer 5

Focused Assessment with Sonography in Trauma 
4 locations examined in ultrasound: 
perihepatic - R side
pericardial - upper abdo
perisplenic - L side
pelvic - lower abdo

Question 6

Computerised Tomography Advantages

Answer 6

excellent images, broad application, rapid result
good access in most major centres
3D images available

Question 7

COmputerised Tomography disadvantages

Answer 7

higher levels of radiation than xray
relatively expensive
doughnut of death

Question 8

Magnetic resonance imaging advantages

Answer 8

gold standard for neuro imaging
gold standard for soft tissue imaging
no ionising radiation

Question 9

Magnetic resonance imaging disadvantages

Answer 9

slow, noisy, unpleasant, unsuitable for most metal

poor access, expensive

Question 10

Ventilation/perfusion scan advantages

Answer 10

less radiation than CTPA

Question 11

Ventilation/perfusion scan disadvantages

Answer 11

high rate of non-diagnostic scans
relies on experience of reporter
slow, labour intensive