Imaging

Question 1

Computer Tomography (CT)

Answer 1

Ionising imaging which provides cross-sectional, multiplanar imaging and good spatial resolution. Limited soft tissue contrast however can distinguishing between different densities).

Question 2

Plain X-Ray

Answer 2

Ionising imaging with great spatial resolution but very limited fluid and soft tissue visualisation.

Question 3

Ultrasound

Answer 3

Non-ionising imaging using Doppler which is operator dependent and cannot see through bones or gas.

Question 4

Magnetic Resonance Imaging (MRI)

Answer 4

Non-ionising imaging which provides good soft tissue contrast but poor visualisation of calcification (bone) or gas.

Question 5

Nuclear Medicine

Answer 5

Provides functional uptake information but very limited anatomical information with high radiation exposure to staff and patient.

Question 6

How to interpret CT images?

Answer 6

Bone is always bright white and fat under the skin always looks dark

Question 7

How to interpret MRI images?

Answer 7

Never see bone and fat. Fluid is bright white in T2 image; black in T1 image.

Question 8

AP?

Answer 8

Anteroposterior- x-ray through front to back. Tends to amplify size of heart.

Question 9

PA?

Answer 9

Posteroanterior – x-ray through back to front