SPR 2019 Fetal Course SAM Session - Session 12

Saturday, September 14th

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* 1. During pregnancy, the placenta produces the following hormone that increases insulin resistance and can predispose women to developing gestational diabetes:

Growth hormone

Testosterone

Insulin

Adrenaline

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* 2. MRI pelvimetry has the potential to predict all of the following except:

Pelvic floor injury (levator ani muscle injuries)

Successful trial of labor after previous cesarean section for cephalopelvic disproportion

Labor dystocia or failure to progress

Vaginal delivery for breech presentation

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* 3. Systematic review of the evidence suggests fetal macrosomia is most accurately detected by:

2D US of fetal biometry using the abdominal circumference alone

2D US of fetal volumetry using thigh volume alone

2D US of fetal volumetry using thigh volume & abdominal circumference

MRI estimates of fetal weight

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* 4. Which factor is not addressed in the 2014 FDA guidelines for MRI risks?

Main static magnetic field strength

Sound pressure level

Local specific absorption rate

Gradient fields rate of change

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* 5. Which statement is correct regarding field strength and specific absorption rate (SAR)?

At 3T, whole body maternal SAR should be limited to < 2 W/kg

At 1.5T, whole body fetal SAR should be limited to < 2 W/kg

Normal level SAR mode should be chosen at 3T and first level SAR mode at 1.5T

First level SAR mode should be chosen at both 1.5T and 3T

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* 6. What factor does not influence SAR in fetal MRI?

Main static field

Flip Angle of pulse sequence

Volume of amniotic fluid

Readout gradient of pulse sequence

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* 7. Which is false?

Gradient field rate of change can cause tissue heating

Gradient field rate of change causes acoustic noise

dB/dt can cause table vibration

dB/dt can cause nerve stimulation

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* 8. Immediate and direct consequences of placental disease in fetal growth restriction that can impair neurodevelopment include:

Neonatal encephalopathy from hypoxic-ischemic injury

Metabolic disease, including type 2 diabetes

Cardiac disease, including atherosclerosis

Cognitive and behavioral outcomes in school-age

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* 9. Textural analysis can be applied to in vivo placental images to characterize:

Placental volume

Placental shape

Placental microstructure

Placental efficiency

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* 10. During maternal hyperoxia in a healthy pregnancy,

Placental oxygenation increases

Placental oxygenation decreases

Placental oxygenation remains unchanged

Fetal brain oxygenation increases

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