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Thoracic Spine
Projections,positions,Area of interest, best seen criteria for Thoracic Spine
Question | Answer |
---|---|
What are the standard views for the Thoracic Spine? | AP, Lateral - Obliques if Zygapophyseal joint needs to be shown |
What is the area of interest for an AP projection of the thoracic spine? | Open intervertebral disk spaces - and transverse processes of all 12 thoracic spine |
What is the SID for an AP projection of the thoracic spine? | 40" SID |
What is the focal spot size for any projection of the thoracic spine? | Large focal spot |
Where do you center for an AP projection of the thoracic spine? | T7 (inferior border of the scapula), center midsagittal plane of body to midline of the grid |
What is the direction of the IR for a AP projection of the thoracic spine? | 14x17 lengthwise - top border of IR 1.5 - 2inches above pt's shoulders |
What is the respiration for an AP projection of the thoracic spine? | The patient can take shallow breaths during the exposure, suspend at the end of full expiration |
What is the direction of the CR for an AP projection of the thoracic spine? | Perpendicular to the IR center halfway between jugular notch and xiphoid process (T7/T8) |
What is the best seen criteria for an AP projection of the thoracic spine? | All 12 thoracic vertebrae from T1-L1 possible, no rotation as seen by spinous processes at the midline of the vertebral bodies |
What is the area of interest for an Lateral projection of the thoracic spine? | Intervertebral foramina - open intervertebral disk spaces of all 12 thoracic spine |
Where do you center for an Lateral projection of the thoracic spine? | Center posterior half of thorax to midline of the grid and at level of T7 |
What is the direction of the IR for a Lateral projection of the thoracic spine? | 14x17 lengthwise - top border of IR 1.5 - 2inches above pt's shoulders |
What is the direction of the CR for a Lateral projection of the thoracic spine? | Perpendicular to the IR at level of T7 - CR enters through posterior half of the thorax |
What do you do if the vertebral column is not elevated to a horizontal plane when the patient is an a lateral recumbent position? | You want to angle the CR/X-ray tube so that it follows the direction of the spine, or perpendicular to the long axis of the spine. An average of 15-20 cephalic - Angle of 15 deg for males and an angle of 10deg for females is for average pts |
What is the best positioning for a lateral thoracic spine? | Patient in left lateral recumbent, a support is under the lower thoracic region to elevate the vertebral column to a horizontal plane. Also a lead shield is placed behind the patient to absorb the scatter radiation. No angulation of CR needed |
What projection is used if upper thoracic region is area of interest? | Lateral Cervicothoracic - Swimmers technique |
What is the SID for a Lateral projection of the Thoracic spine? | 40" SID |
What is the respiration for a Lateral projection of the thoracic spine? | At the end of expiration; or pt breathing normally but increase exposure time to blur lung markings |
What is the best seen criteria for a Lateral projection of the thoracic spine? | All 12 thoracic vertebrae from T1-L1 possible, intervertebral foramina, open intervertebral disk spaces, no rotation as seen by ribs superimposed posteriorly. |
What position is best used to see the thoracic zygapophyseal joints? | AP or PA oblique |
What position is best used to see the thoracic intervertebral foramina? | Lateral |
What position is best used to see the thoracic intervertebral disk spaces? | AP |
What position is best used to see the thoracic zygapophyseal joints? | AP or PA oblique |
What position is best used to see the thoracic intervertebral foramina? | Lateral |
What position is best used to see the thoracic intervertebral disk spaces? | AP |
What position is best used to see the thoracic zygapophyseal joint space of C7-T1? | Cervicothoracic - Lateral Swimmwers |
What is the degree of body rotation used for an oblique projection of the thoracic spine? | Coronal plane forms a 70degree angle from the IR - 20degrees anterior (PA oblique) or 20degrees posterior (AP oblique) |
Where is the centering for a oblique projection of the thoracic spine? | Center the vertebral column to the midline of the grid or T7 inferior border of the scapula |
What is the direction of the IR for an Oblique projection of the thoracic spine? | 14x17 lengthwise - top border of the IR 1.5-2inches above pts shoulders |
What is the direction of the CR for an oblique projection of the thoracic spine? | Perpendicular to the IR entering/exiting through T7 inferior border of the scapula |
What is the area of interest for an AP RPO/LPO oblique projection of the thoracic spine? Side up or Side down? | AP - SIDE UP area of interest Zygapophyseal joints farthest from IR |
What is the area of interest for an PA RAO/LAO oblique projection of the thoracic spine? Side up or Side down? | PA - SIDE DOWN area of interest Zygapophyseal joints closest to IR |
What is the SID for an oblique projection of the thoracic spine? | 40" SID |
What is the type of curve on the thoracic spine? | Kyphotic Curve |
How many vertebrae are in the thoracic spine? | 12 |
What is the landmark of the xiphoid process in relation to the thoracic spine? | T9/T10 |
What is the landmark of the jugular notch in relation to the thoracic spine? | T1 |