SPR 2020 Body MRI Course - SAM Session 6: MRI of the Vasculature

Saturday, September 26, 2020 | 11:10 AM - 1:10 PM

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* 1. 2-month-old baby girl with a new lump on the chest wall that has been rapidly growing in the last 6 weeks. The mother first noticed a localized skin telangiectasia at birth. The lesion protrudes on the skin with a bright red cap, a bluish deep component and prominent draining veins. It is warm to touch and not painful. What is the most probable diagnosis?

A. Venous malformation

B. Lymphatic malformation

C. Infantile Hemangioma

D. Rhabdomyosarcoma

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* 2. What are the most common acute clinical presentations of a lymphatic malformation?

A. Pulsation or skin ulceration.

B. Infection or spontaneous intra-lesional bleed.

C. Pain or heaviness.

D. Overgrowth or thrombosis.

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* 3. What type of base sequence is optimal for contrast-enhanced vascular assessment?

A. Gradient echo because flow related enhancement allows for intravascular signal

B. Gradient echo because flow voids create maximum contrast between vessels and surrounding tissues

C. Spin echo because flow related enhancement allows for intravascular signal

D. Spin echo because flow voids create maximum contrast between vessels and surrounding tissues

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* 4. What of the following sequences would be best to visualize temporal blood flow kinetics?

A. Respiratory-navigated, cardiac-gated MRA

B. Time-resolved MRA

C. Conventional ‘Static’ MRA

D. Modified spoiled GRE variants (VIBE/THRIVE/LAVA)

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* 5. What is the main advantage of contrast enhanced MRA versus non-contrast enhanced MRA?

A. Spatial resolution

B. Easily repeatable

C. Signal to noise ratio

D. Lower cost

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* 6. How can you reduce signal loss from intravoxel flow dephasing in time of flight MRA imaging?

A. Increase TR

B. Decrease TE

C. Increase flip angle

D. Move saturation band superiorly

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* 7. What is the approximate timing of the passage of contrast on central MR lymphangiography following the intranodal injection of 0.1 mmol/kg of a gadolinium contrast agent into the groin of a normal patient?

A. Venous system via the thoracic duct in 3-4 minutes

B. Venous system via the thoracic duct in 5-10 minutes

C. Venous system via the thoracic duct in 20-30 minutes

D. Venous system via the thoracic duct in 30-45 minutes

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* 8. When accessing the liver lymphatics prior to performing an Intrahepatic Dynamic Contrast MR Lymphangiogram, where is the optimal placement of the needle?

A. Along the surface of the liver

B. Within the intrahepatic bile ducts

C. Adjacent to the branch of the portal vein

D. Adjacent to a branch of the hepatic vein

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* 9. On MRI, arteriovenous malformations characteristically show:

A. Well-defined enhancing soft-tissue mass

B. Central phleboliths

C. Early venous filling

D. Normal enhancing capillary network

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* 10. On MRI, venous malformations characteristically show:

A. Progressive gradual enhancement

B. Organized array of fibrous and fatty tissue

C. Predominantly low signal on T2-weighted images

D. Large feeding arteries

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