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CSB063 - Exam Prep Study Guide
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CSB063 - Exam Prep Study GuideGive 3 examples why Primovist was used instead of other contrasts. - Answer - For
imaging liver conditions.
- Taken up by hepatocytes and equally excreted by renal and biliary in humans
- Liver tumours
Liver Cysts
Malignant and benign liver lesions
What is MRI spectroscopy? - Answer Uses gradients to selectively excite a small volume
of tissue and produces a spectrum from that voxel instead of an image.
What does a stroke appear as in spectoscopy? - Answer -Cell death: lactate peak
-reduced NAA
-elevated choline
What is the process you would go through for a patient presenting with dysphasia? -
Answer Dysphasia is problem talking - consider a stroke protocol:
T1 Axial Brain
T2 Axial Brain
Flair Axial Brain
Diffusion Axial Brain
T2/T1 sagittal brain
What is the Faraday Cage? - Answer Cage used to prevent Radiofrequencies from
disrupting other frequencies.
What is Larmor's equation? - Answer Wo=yxb0
W0 is the rate of proton precession
Y = Gyromagnetic field (constant)
B0= Magnetic field strength
What is the radio of strength of a tesla as a magnetic field? - Answer
Artifact images - Answer
Knee pathology - Answer
, What is an additional sequence you would run on a pituitary? - Answer Dynamic imaging
taken 1 min apart. Post contrast series with fat sat band.
What sequence would you run on a pituitary - Answer Positioning same for brain, IV
contrast,
Small FOV
Thin collimation
Scan time (Dynamic)
Vascular flow causes artifacts so use pre saturation bands
What are the best planes for pituitary ? - Answer Coronal & Sagittal
What is a typical brain sequence? - Answer T1 axial brain
T2 axial brain
flair axial brain
difffusion axial brain
T2/T1 sagittal brain
The human body is mostly made of __ - Answer H20
When would we use contrast? - Answer If trying to assess a tumour or multiple
sclerosis.
Need to know Cranial nerves V, VII, VIII - Answer
What are 3 main advantages to 3T vs 1.5T - Answer - Increased signal to noise ratio:
there is a proportional relationship between in tesla and an increase in SNR.
- Decrease scan time for same resolution
- Increased resolution for same scan time
Advantages of MRI over other modalities - Answer - multiplanar
- dynamic imaging
- non ionising
- high spatial resolution
- functional
- not operator dependent
- non-invasive
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