## What is the central ray angle for the AP axial oblique projection of the cervical intervertebral foramina?

The central ray angle for the PA axial oblique projection of the cervical intervertebral foramina is. **15-20 degrees caudal**.

## How and where should the central ray be directed for the AP axial projection of the cervical vertebral column?

How and where should the central ray be directed for the AP axial projection of the cervical vertebral column? **15-20 degrees cephalad to C4.**

## What is the central ray angulation for an AP axial oblique projection of the cervical spine on a trauma patient?

C-Spine positioning

Question | Answer |
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The twining method demonstrates the Cervicothoracic region in which projection? | lateral swimmers |

What is the CR angulation for an AP axial projection of the cervical spine on a trauma patient? | 15-20 cephalad |

## What is the central ray centering point for an AP oblique lumbar spine?

What is the central-ray centering point for an AP oblique lumbar spine? **2 inches medial to the elevated ASIS and 1 1/2 inches above the iliac crests**. If the lumbar spine cannot be adjusted so it is horizontal for the lateral projection, the central ray should be angled: 5 degrees men, 8 degrees women – caudad.

## What is the proper patient position for an AP oblique projection of the cervical spine?

XR 105 Midterm

Question | Answer |
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what is the proper patient position for an AP oblique projection of the C spine? | 45 degree posterior oblique position |

what anatomical structures are best demonstrated by the AP oblique projections of the C spine? | the intervertebral foramina FARTHEST from the film |

## Why are the anterior oblique projections preferred over the posterior oblique projections of the cervical spine?

The PA oblique projection is preferred **as it reduces radiation dose to the thyroid ^{1}**, compared to the AP oblique projection.

## Which vertebra is connected directly to head?

**The first vertebra (C1)** is the ring-shaped atlas that connects directly to the skull. This joint allows for the nodding or “yes” motion of the head. The second vertebra (C2) is the peg-shaped axis, which has a projection called the odontoid, that the atlas pivots around.

## Where is the central ray centered for a hyperflexion or hyperextension lateral cervical spine?

positioning c-spine

Question | Answer |
---|---|

What is the name of the second cervical vertebra? | axis |

For the swimmers technique what is the external landmark that we use for the central ray entrance? | 2 inches above jugular notch |

Where does the central ray enter for hyperflexion and hyperextension projection of the cervical spine? | C4 |

## What are the optimal tube angle and direction for AP oblique projections of the cervical spine?

The tube should be angled **at 15 degrees**.

## Why is the chin extended for a lateral projection of the cervical spine?

Why is the chin extended for a lateral projection of the cervical spine? … **The posterior cervical oblique projections demonstrate the intervertebral foramina and pedicles on the side closest to the image receptor**.

## What is the correct position of the Scottie dogs in the oblique position for lumbar spine exam?

Both sides should be examined for comparison. When the patient has been properly positioned in a **30°-45° oblique** position, the articular process and facet joints have the appearance of “Scottie dogs.”

## Where is the central ray directed for a lateral projection of the lumbar spine?

Cards

Term Which of the following describes the central ray centering point for the L5-S1 lateral projection? | Definition 2 inches posterior to the ASIS and 1 1/2 inches below the iliac crests |
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Term Where is the 14X17 inch (35X43 cm) central ray directed for a lateral lumbosacral spine | Definition Iliac crests |

## What is the recommended central ray angle if the lumbar spine Cannot be adjusted so it is horizontal for the lateral projection?

If the lumbar spine cannot be adjusted so it is horizontal for the lateral projection, the CR should be angled **5 degrees for men and 8 degrees caudad for women**.