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spine x-ray
Question | Answer |
---|---|
What SID is used on an AP open mouth projection of the atlas and axis and why? | 30" SID to increase the field of view of the odontoid |
What needs to be in a perpendicular line to the IR when positioning for and AP open mouth view of the odontoid? | the lower edge of the upper incisors to the tip of the mastoid process |
How is the CR directed for an AP axial projection of the c-spine? | 15-20 degrees cephaldad at C4 or inferior to most prominent point of thyroid cartilage |
What does the AP axial projection of the c-spine show? | 5 lower cervical bodies and two or three upper thoracic |
Where is the IR positioned for a lateral projection of the c-spine? | 1" above EAM |
Where is the CR directed for a lateral projection of the c-spine? | at C4 |
What are the breathing instructions for a lateral c-spine? | suspend respiration on exhalation to depress shoulders |
What vertebral structures are seen on a lateral c-spine radiograph? | lower 5 cervical zygopophyseal joints |
Where so you center the CR and IR on Lateral flexion and extension c-spine? | cr at c4 and IR 2" above eam |
Where do you direct the CR for RPO and LPO projections of the c-spine? | 15-20 degrees cephalic at c4 |
What is shown on the RPO and LPO projection of the C-spine? | The foramina and pedicles farthest from the IR |
Where do you direct the CR for an LAO and RAO projection for the c-spine? | 15-20 degrees caudad at C-4 |
What structures are shown in the LAO and RAO projections for the c-spine? | the foramina and pedicles closest to the IR |
How do you position the patient for a Lateral projection of the cervicothoracic region using a swimmer's technique? | raise arm that is closest to IR above head and depress other shoulder |
Where do you center for a Lateral projection of the cervicothoracic region using a swimmer's technique? | c7-T1 or 2" above jugular notch or 3-5 degrees caudad if shoulder cannot be depressed properly |
To reduce kyphosis on an AP projection of the thoracic vertebrae what would you have the patient do? | flex hip and knees |
Where do you center the IR and CR for an AP projection of the thoracic vertebrae? | superior edge of IR 1 1/2 - 2 above shoulder and the CR half way between the jugular notch and xiphoid process |
Where do you center the CR on a lateral projection of the t-spine? | At T-7 |
What would you do if the patients spine is not parallel to the table for a lateral projection of the t-spine? | Angle the tube 10-15 degrees cephalic or put a wedge under the patients lumbar region |
What breathing technique would you use on a lateral projection of the t-spine? | normal breathing to obliterate lung detail |
Where do you center the CR on a AP projection of the L-spine to only show the lumbar spine? | 1 1/2" above the iliac crest |
Where do you center the CR on an AP projection of the L-spine to show the lumbar spine and sacrum? | at the iliac crest (L4) |
Where do you center the CR for a lateral projection of the L-spine? | on the midcoronal plane at the iliac crest |
Where do you center the CR for a Lateral projection of the L-5 S-1 junction? | 1 1/2" inferior to iliac crest and 2" posterior to ASIS angle 5-8 degrees caudad if spine is not horizontal |
What is visualized on RPO and LPO Radiograph of the L-spine? | the articular processes and zygopopyseal joints that are closest to the IR |
Where do you center the CR on an AP oblique of the L-spine? | 2" medial to the elevated ASIS and 1 1/2" above the iliac crest |
On an oblique radiograph of the L-spine What does it mean when the pedicle is anterior of the vertebral body? | It means the patient is not rotated enough |
On an oblique radiograph of the L-spine What does it mean when the pedicle is posterior of the vertebral body? | It means the patient is rotated too much |
What is visualized on a radiograph of the L-spine when the patient is in an LAO or RAO postion? | Zygopophyseal joints farthest from the film |
Where do you center the CR for the L-spine when the patient is in an LAO or RAO postion? | 1 1/2" superior to the iliac crest and 2" lateral to the spinous process |
Where do you center the CR for an AP view of the lumbosacral junction and sacroilliac joints? | 30-35 degrees cephalic 1 1/2" superior to the pubic symphysis |
How many degrees do you rotate the patient to for an oblique projection of the sacroiliac joint | 25-30 degrees |
Where do you center for the posterior oblique projection of the sacroiliac joints? | 1" medial to the elevated ASIS |
Where do you center the CR for the anterior oblique projection of the sacroiliac joint | 1" medial to the ASIS closest to the IR |
Where do you center the CR for an AP projection of the Sacrum? | 15 degrees cephalic 2" superior to the pubic symphysis |
Where do you center the CR for an AP projection of the coccyx? | 10 degrees caudad entering 2" superior to the pubic symphysis |
Where do you center for lateral projection of the sacrum an coccyx? | at the level of the ASIS and 3 1/2 " posterior from it |
Where do you center for just the lateral coccyx? | 2" inferior and 3 1/2" posterior to the ASIS |
What is the AP projection of the L-spine with Right or Left bending used for? | to show structural changes of patients with early scoliosis, herniation, or spinal fusion |
How do you postion a patient for an AP projection of the L-spine with Right or Left bending used for? | place them supine, cross left leg on top for right bending and bring heals and shoulders lateraly, and vice versa |