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Fetal Imaging

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Which of the following statements accurately describes the relationship between tissue penetration and image resolution in ultrasound?

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a. Higher-frequency transducers yield better image resolution.

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b. Lower-frequency transducers yield better image resolution.

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c. Higher-frequency transducers penetrate tissue more effectively.

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d. None of the above

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Although sonography is generally considered safe in human pregnancy, the potential for temperature elevation is increased in which of the following situations?

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a. Third trimester

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b. Longer examination time

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c. Near soft tissue rather than bone

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d. All of the above

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Documentation of embryonic or fetal cardiac activity should be accomplished with which of the following types of ultrasound?

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a. M-mode

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b. L-mode

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c. Color Doppler

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d. Pulsed Doppler

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What is the single most accurate biometric predictor of gestational age?

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a. Crown-rump length

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b. Head circumference

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c. Abdominal circumference

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d. Gestational sac mean diameter

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Sonographic evaluation of all EXCEPT which of the following are best achieved in the first trimester?

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a. Adnexa

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b. Cervical length

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c. Ectopic pregnancy

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d. Chorionicity of twins

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An anembryonic pregnancy may be accurately diagnosed at what mean gestational sac diameter when using transvaginal ultrasound?

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a. 5 mm

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b. 10 mm

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c. 15 mm

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d. 20 mm

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A 41-year-old G3P2 presents at 12 weeks’ gestation for a first-trimester sonographic evaluation. The nuchal translucency is ...

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