Table of Contents
What is the degree of rotation on the body for an oblique C spine How is the head positioned?
For the oblique view of the cervical spine, the patient may be erect or recumbent. The patient is rotated 45° to the left, to demonstrate the right-side neural foramina. The CR is directed to the C-4 vertebra with 15°-20° cephalad angulation.
What is the central ray angle for a PA oblique projection of the cervical spine?
What is the central-ray angulation for an AP axial oblique projection of the cervical spine on a trauma patient? The central-ray angle for an AP axial projection of the coccyx is: 10 degrees caudad.
What is the significance of a 45 degree oblique position for a cervical spine examination?
To demonstrate the intervertebral foramen of the c-spine open, it is necessary to achieve adequate rotation of the vertebral column, usually at 45°.
How many degrees of rotation is needed in the AP oblique projection RPO position of the thoracic vertebra if the patient is in lateral recumbent?
20 degrees
Thoracic Spine AP or PA Oblique Projection Upright Position of patient Standing or sitting erect in a lateral position in front of a vertical grid. The body is rotated 20 degrees posterior or anterior (AP or PA oblique, respectively). The vertebral column is centered to the midline of the grid.
What tube angle is used on a posterior oblique position of the C spine?
15 degrees
The tube should be angled at 15 degrees. The patient should be asked to stop breathing when the exposure is taken.
What is the average rotation of the patient in the PA oblique projection of the chest?
Position of part The left shoulder and hip should be elevated to rotate the thorax. This avoids vertebral and sternal superimposition. On average, rotation of 15-20 degrees is required. The patient’s body should be aligned to center the long axis of the sternum on the midline of the grid.
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.
Where should the central ray enter for an oblique 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 |
|---|---|
| Term The respiration phase for the AP oblique projection of the lumbar spine is: | Definition expiration |
What is the recommended SID for the AP axial oblique projection of the cervical spine?
C-Spine positioning
| Question | Answer |
|---|---|
| The recommended SID for a dorsal decubitus cross table lateral projection of the c spine on a trauma patient is: | 60-72 inches |
| What is the CR angulation for an AP axial projection of the c spine on a trauma patient? | 15-20 degrees cephalad |
How much angle would be required on an oblique position of the thoracic spine to demonstrate the zygapophyseal joints?
The thoracic zygapophyseal joints are 70 degrees to the MSP and are demonstrated in a steep (70-degree) oblique position. The thoracic intervertebral foramina, formed by the vertebral notches of the pedicles, are 90 degrees to the MSP. They are, therefore, well demonstrated in the lateral position.
How many degrees and in what direction should the tube be angled for an AP projection of the cervical spine?
Cervical Spine AP Supine The vertical beam is angled 15 degrees. Position of part Remove necklaces, hair grips, and anything else from the hair. The tube should be angled at 15 degrees. The patient should be asked to stop breathing when the exposure is taken.
What is the purpose of taking an oblique angle radiograph?
CXR oblique views in the assigned angle from the 10-degree rotation angle recommendation are able to enhance contrast ratio between the possible obscured lesions and surrounding structures on CXR.
How many degrees is the body rotated for the AP oblique projection of the sacroiliac joints?
Study Questions
| Question | Answer |
|---|---|
| What specific set of zygapophyseal joints is demonstrated in the RAO position? | left, upside |
| How many degrees is the body rotated for the AP oblique projection of the sacroiliac joint? | 25-30 |
| defined as: malignancy involving the bone marrow | multiple myeloma |
How many degrees and in what direction should the tube be angled for an AP axial projection of the cervical spine?
The tube should be angled at 15 degrees.
How many degrees and in which direction should the CR be directed for an AP axial projection of the coccyx?
Cards
| Term Which two vertebral curvatures are anteriorly concave? | Definition Thoracic and sacral(pelvic) |
|---|---|
| Term How many degrees and in which direction should the central ray be directed for AP projections of the coccyx? | Definition 10 degrees caudad |
What angle is oblique drawing?
45-degree
Oblique projections are created using oblique grid paper and use 45-degree lines to create a 3D graphical image. Oblique drawings are not very realistic as it is impossible to see the front of an object straight on and the side at the same time.
What is an oblique radiograph?
The lateral oblique x-ray view of the mandible and maxilla taken on an extra-oral film is a frequently used method for giving a record of the teeth in the buccal segments from canine to third molar show- ing the teeth both erupted and unerupted or to assess the positions of unerupted third permanent molars.
What are the AP oblique cervical spine projections?
The AP oblique cervical spine projections are supplementary views to the standard AP, odontoid and lateral c-spine series. It can be taken either as an anterior oblique or posterior oblique projection.
What is the angle of central ray of cervical spine?
This angle can and will vary between 5-20° depending on the position of the head. To project the intervertebral disc spaces open, the central ray should be directed perpendicular to the long axis of the vertebral column 3, 4.
What are the different radiographic views of the cervical spine?
cervical spine radiography AP view lateral view AP oblique view PA oblique view cervicothoracic view (swimmer’s view) AP open mouth odontoid view AP closed mouth odontoid view (Fuchs view) lateral flexion and extension views
What is the cephalic angle of the cervical spine?
For this reason, a cephalic angle is required to project through the long axis of the vertebral column. This angle can and will vary between 5-20° depending on the position of the head. To project the intervertebral disc spaces open, the central ray should be directed perpendicular to the long axis of the vertebral column 3, 4.