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Questions and Answers
Which projection is used to visualize the sacrum and coccyx?
Which projection is used to visualize the sacrum and coccyx?
What is the recommended SID for the AP axial projection of the sacrum and coccyx?
What is the recommended SID for the AP axial projection of the sacrum and coccyx?
What is the recommended IR size for the AP axial projection of the sacrum and coccyx?
What is the recommended IR size for the AP axial projection of the sacrum and coccyx?
What is the recommended CR angle for the AP axial projection of the sacrum and coccyx?
What is the recommended CR angle for the AP axial projection of the sacrum and coccyx?
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Why is it important to ensure that there is no rotation of the pelvis during the AP axial projection of the sacrum and coccyx?
Why is it important to ensure that there is no rotation of the pelvis during the AP axial projection of the sacrum and coccyx?
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Which of the following is a clinical indication for the AP axial projection of the sacrum and coccyx?
Which of the following is a clinical indication for the AP axial projection of the sacrum and coccyx?
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What is the recommended CR angle for the AP axial projection of the sacrum and coccyx?
What is the recommended CR angle for the AP axial projection of the sacrum and coccyx?
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What is the recommended collimation for the AP axial projection of the sacrum and coccyx?
What is the recommended collimation for the AP axial projection of the sacrum and coccyx?
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When should the technologist increase the CR angle for the AP axial projection of the sacrum and coccyx?
When should the technologist increase the CR angle for the AP axial projection of the sacrum and coccyx?
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What should be done to the urinary bladder before the AP axial projection of the sacrum and coccyx?
What should be done to the urinary bladder before the AP axial projection of the sacrum and coccyx?
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Which projection is used for diagnosing mandible fractures and neoplastic or inflammatory processes?
Which projection is used for diagnosing mandible fractures and neoplastic or inflammatory processes?
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What is the minimum SID for SMV projection?
What is the minimum SID for SMV projection?
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What is the recommended IR size for SMV projection?
What is the recommended IR size for SMV projection?
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What is the recommended patient positioning for SMV projection?
What is the recommended patient positioning for SMV projection?
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Where should the CR be aligned for SMV projection?
Where should the CR be aligned for SMV projection?
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What is the purpose of collimation for SMV projection?
What is the purpose of collimation for SMV projection?
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Which table lists lumbar spine joint and foramina positioning?
Which table lists lumbar spine joint and foramina positioning?
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What is the minimum SID recommended for the SMV projection of the mandible?
What is the minimum SID recommended for the SMV projection of the mandible?
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What is the recommended IR size for the SMV projection of the mandible?
What is the recommended IR size for the SMV projection of the mandible?
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What is the evaluation criteria for the SMV projection of the mandible?
What is the evaluation criteria for the SMV projection of the mandible?
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What can be visualized on a true lateral projection of the lumbar spine?
What can be visualized on a true lateral projection of the lumbar spine?
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What do oblique projections of the lumbar spine require knowledge of?
What do oblique projections of the lumbar spine require knowledge of?
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Which zygapophyseal joints can be visualized on posterior oblique positions of the lumbar spine?
Which zygapophyseal joints can be visualized on posterior oblique positions of the lumbar spine?
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What should be used to protect radiosensitive tissues outside the region of interest during radiographic projections?
What should be used to protect radiosensitive tissues outside the region of interest during radiographic projections?
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Study Notes
Radiographic projections for mandible and lumbar spine
- Submentovertical (SMV) projection is used for diagnosing mandible fractures and neoplastic or inflammatory processes.
- Minimum SID for SMV projection is 40 inches, and the recommended IR size is 8x10 or 10x12 inches with a grid.
- Patient positioning for SMV projection requires hyperextension of the neck and alignment of MSP perpendicular to the midline of the grid or table.
- The CR for SMV projection should be aligned perpendicular to the IR or IOML and centered between the angles of the mandible or 1 inch inferior to the mandibular symphysis.
- Collimation should be done on four sides to the anatomy of interest, and respiration should be suspended.
- Evaluation criteria for SMV projection include demonstrating the entire mandible and coronoid and condyloid processes, correct neck extension, no patient rotation or tilt, and collimation to the area of interest.
- The intervertebral foramina for the lumbar spine can be visualized on a true lateral projection.
- Oblique projections of the lumbar spine require knowledge of the anatomy of the vertebrae and the zygapophyseal joints.
- Posterior oblique positions can visualize the downside zygapophyseal joints, while anterior oblique positions can visualize the upside joints.
- The degree of rotation for oblique positions depends on the area of the lumbar spine of interest.
- Table 9.1 lists lumbar spine joint and foramina positioning, and Table 9.2 lists joint classifications of the lumbar spine.
- Proper shielding should be used to protect radiosensitive tissues outside the region of interest during radiographic projections.
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Description
Test your knowledge on the AP Axial Projection technique for imaging the sacrum and coccyx. Learn about the clinical indications and technical factors involved in capturing clear images of the sacrum, including common pathologies and the importance of patient preparation. Make sure to brush up on the necessary steps to ensure a successful procedure before taking this quiz!
