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MRI Anatomy and Positioning Flashcards

6 cards from real MRI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 MRI Anatomy and Positioning flashcards as text

  1. Which coil type provides the highest signal-to-noise ratio (SNR) for imaging small superficial structures such as the wrist?

    Answer: Dedicated extremity or surface coil

    Dedicated extremity or surface coils placed close to the anatomy maximize SNR by minimizing the receive volume to the region of interest.

  2. The 'magic angle' artifact in MRI tendons occurs at approximately what angle relative to the main magnetic field?

    Answer: 55°

    Magic angle artifact occurs when a tendon is oriented at approximately 55° (the magic angle) to B0, causing artificial T1/PD signal increase that can mimic pathology.

  3. For pituitary gland MRI, which plane is considered the primary imaging plane?

    Answer: Coronal

    Coronal thin-slice images are the primary plane for pituitary imaging because they best demonstrate lateral extension, cavernous sinus invasion, and microadenomas.

  4. Which positioning aid is used to maintain the ankle in a 90° neutral position during MRI to optimally visualize the Achilles tendon?

    Answer: Ankle positioning block or foam wedge

    A foam wedge or ankle block holds the foot perpendicular to the leg, minimizing magic angle artifact and providing consistent Achilles tendon orientation.

  5. On a sagittal MRI of the cervical spine, the posterior longitudinal ligament appears as a thin structure along which surface of the vertebral bodies?

    Answer: Posterior

    The posterior longitudinal ligament runs along the posterior surfaces of the vertebral bodies inside the spinal canal, anterior to the thecal sac.

  6. When performing MR arthrography of the hip, the patient is typically positioned with the hip in which orientation?

    Answer: Neutral or slight internal rotation

    Neutral to slight internal rotation during hip MR arthrography places the femoral neck parallel to the imaging plane and optimizes labral visualization.