Indications for imaging
Congenital abnormalities, scoliosis, trauma, pain, metastasis's.
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Anatomy Demonstrated
Thoracic vertebra,
Thoracic Spine Upper Lateral Anatomy
Meschan, I. 1955 An Atlas of Normal Radiographic Anatomy
Saunders, London
|
Basic Patient Position
The patient stands erect with the median saggital plane
parallel to the bucky face, the arm nearest the bucky is raised
the elbow flexed and the forearm rested on the top of the head.
The other arm is positioned hanging loosely at the patients
side, a weight may help lower the shoulder.
Thoracic Spine Lateral Patient Position
Meschan, I. 1955 An Atlas of Normal Radiographic Anatomy
Saunders, London
|
Radiation protection
There are many local rules for gonad protection however the
following should be taken into account. The 28 day rule should
be applied for female patients.
In males and females direct lead rubber gonad protection can be applied at
all times,
|
Central Ray
The horizontal central ray is centered midway between the
skin surfaces at the level of the palpable spinous process of
c7.
Exposure is made on suspended expiration.
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Exposure Factors
Kv |
mAS |
FFD (cm) |
Grid |
Focus |
AEC |
Cassette |
90 |
40 |
100 |
Yes |
Broad |
Yes |
24 x 30 cm |
|
Evaluation of the Image
ID and markers must be present and correct in the appropriate
area of the film
Evidence of collimation on four sides equally around the
centering point.
Optimal exposure should penetrate all the bone structures and
contrast should be low enough to visualise fully the bone and
soft tissue structures.
Limits of the examination, superiorly C4, inferiorly T4,
posteriorly the skin surface.
the vertebra should be projected in true lateral position with the
intervertebral and facets joints open.
Thoracic Spine Upper Lateral Radiograph
Meschan, I. 1955 An Atlas of Normal Radiographic Anatomy
Saunders, London
|
Related Projections
Thoracic and Cervical spine Lateral
|
Additional modalities
CT
MRI |
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