MRI MRI Anatomy and Pathology 3

Question 1

A 'blooming' artifact on gradient echo (GRE) MRI is caused by which substance?

Accepted Answer

Hemosiderin or calcification

Answer

Fat

Answer

Gadolinium contrast

Answer

Cerebrospinal fluid

Question 2

On MRI of the prostate using PI-RADS scoring, which sequence is the most dominant sequence for peripheral zone lesions?

Accepted Answer

Diffusion-weighted imaging (DWI)

Answer

T1-weighted

Answer

Dynamic contrast-enhanced (DCE)

Answer

MR spectroscopy

Question 3

Which MRI finding is characteristic of a benign rotator cuff tear involving a full-thickness supraspinatus tendon rupture?

Accepted Answer

Fluid signal gap (T2 bright) extending through the full thickness of the tendon

Answer

Low signal on all sequences through the tendon

Answer

T1 bright signal in the tendon

Answer

Low T2 signal with thickening of the tendon

Question 4

On brain MRI, the hippocampus is best evaluated for atrophy (as in Alzheimer's disease) on which plane?

Accepted Answer

Coronal, especially perpendicular to the long axis of the hippocampus

Answer

Axial only

Answer

Sagittal only

Answer

Oblique axial

Question 5

In MRI of the breast, a finding described as a 'rim-enhancing mass' on dynamic contrast imaging is most suspicious for:

Accepted Answer

Malignant lesion

Answer

Simple cyst

Answer

Fibroadenoma

Answer

Fat necrosis

Question 6

Which MRI technique uses the difference in signal between in-phase and opposed-phase images to detect intravoxel fat within a lesion?

Accepted Answer

Chemical shift imaging (Dixon technique)

Answer

STIR fat suppression

Answer

Diffusion-weighted imaging

Answer

MR spectroscopy