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203 MEDIMAGE - Lectures > 4a. Cervical Spine > Flashcards

4a. Cervical Spine Flashcards

1
Q

what is the SID for cervical spine views

lateral views

oblique views

A

110cm

lateral = 150-180cm

oblique = 100-180cm

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2
Q

what is the kV for cervical spine views

A

70-85kV

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3
Q

what is the mAs for cervical spine views

A

16mAs

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4
Q

do you use grids for cervical spine views

A

yes

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5
Q

what is the breathing technique for cervical spine views

A

suspend respiration on exposure

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6
Q

what is the CP for the odontoid view

A

through the centre of the open mouth

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7
Q

what is the patient positioning for the AP open mouth view

3 things

A

supine/erect

mouth open

lower margin of upper incisor perpendicular to the base of skull and IR

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8
Q

what is the collimation for the AP open mouth view

A

top teeth to chin level

horizontal line in line with lip crease

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9
Q

what is the image critique for the AP odontoid view in terms of position

in terms of superimposition, no head rotation, which joint space needs to be open

3 things

A

upper incisors and BOS superimposed

no head rot = EAM at the same level

C1-2 atlantoaxial joint space open

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10
Q

what is the image critique for the AP odontoid view in terms of area of interest

in terms of C1 and C2 and dens

3 things

A

entire dens in foramen magnum

C2 vertebral body

C1 lateral masses and transverse processes

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11
Q

what is the CP for the AP axial view

A

15-20*cranial

midline of lower thyroid cartilage (C4)

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12
Q

what is the patient positioning for the AP axial view

3 things

A

supine/erect

no swallowing, suspend respiration

chin raised so CR angle superimposes chin over BOS

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13
Q

what is the collimation for AP axial view

in terms of laterally and inferiorly

A

C-spine laterally

T2 inferiorly

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14
Q

what is the image critique for the AP axial view in terms of area of interest

2 things

A

C3-T2 vertebral bodies and intervertebral joints

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15
Q

what is the image critique for the AP axial view in terms of positioning

in terms of no rotation, joints to be open, spinous processes and superimposition

4 things

A

no rotation = EAM equidistant

intervertebral joints open

spinous processes equidistant to midline

BOS and mandible superimpose C1-2

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16
Q

what is the CP for the posterior oblique view

A

15-20* cranially to C4

17
Q

what is the CP for the anterior oblique view

A

15-20* caudally to C4

18
Q

what is the patient positioning for the AP/PA oblique view

in terms of MSP plane, body and head rotation, skull rotation, chin position

4 things

A

erect

MSP perpendicular to the IR

body and head 45* oblique
skull 45-90* rotation

protract and elevate chin

19
Q

why do you need to protract and elevate the chin for the AP/PA oblique views

A

protract = prevent mandible superimposing vertebrae

elevate = AML line parallel to the floor

20
Q

what is the image critique for the AP/PA Oblique view in terms of positioning

in terms of intervertebral foramina, pedicles and superimposition

3 things

A

intervertebral foramina uniformly open

pedicles in profile

no C1/BOS superimposition

21
Q

what is the image critique for the AP/PA Oblique view in terms of area of interest

2 things

A

C2-7 intervertebral foramina open

cervical pedicles demonstrated

22
Q

in terms of AP/PA oblique views which is upside and which is downside

A

upside = Posterior oblique

downside = anterior oblique

23
Q

what is the CP for the lateral view

A

horizontal ray

perpendicular to C4 upper thyroid cartilage

24
Q

what is the patient positioning for the lateral view

in terms of what 2 things are aligned to the CR/IR, shoulders and chin

4 things

A

erect

C-spine and MCP aligned to the CR/IR

shoulders depressed and rolled forwards

protract and chin elevated

25
Q

what is the image critique for the lateral view in terms of area of interest

2 things

A

C1-7 intervertebral joint spaces and vertebral bodies

26
Q

what is the image critique for the lateral view in terms of positioning

in terms of what shows no rotation and what should be superimposed

2 things

A

no rotation = mandible not superimposed over C1/2

superimposition of zygapophyseal joints

27
Q

what is the CP for the cervicothoracic/swimmers view

A

perpendicular to T1

2.5cm above jugular notch

28
Q

what is the patient positioning for the cervicothoracic/swimmers view

in terms of arm near and furthest from IR

3 things

A

erect

arm near IR flexed, forearm rest on head for support

arm furthest from IR depressed and rotated posteriorly

29
Q

what is the image critique for the cervicothoracic/swimmers view in terms of area of interest

3 things

A

C5-T3 vertebral bodies and intervertebral disk spaces

humeral heads separated vertically

30
Q

what is the image critique for the cervicothoracic/swimmers view in terms of positioning

in terms of humeral heads, vertebral bodies, rotation of the body and vertebrae

4 things

A

separation of humeral heads from C-spine

vertebral bodies in lateral perspective

no thorax/hip/shoulder rotation

minimal vertebrae rotation

31
Q

what is the CP for the lateral hyperflexion/hyperextension view

A

perpendicular to C4, upper thyroid cartilage

32
Q

what is the patient positioning for the lateral hyperflexion/hyperextension view

in terms of body rotation, IR alignment, shoulders and chin

5 things

A

erect

No pelvis/shoulder/head rotation

C-spine aligned to IR midline

Depress shoulders (weights)

Chin elevated/depressed as much as possible

33
Q

what is the image critique for the lateral hyperflexion/hyperextension view in terms of area of interest

A

C1-7

34
Q

what is the image critique for the lateral hyperflexion/hyperextension view in terms of positioning

in terms of head rotation and spinous processes

3 things

A

No head rotation

Hyperflexion = spinous process separated

Hyperextension = spinous process in close proximity

203 MEDIMAGE - Lectures (12 decks)

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