Lecture 22
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Lecture (22). Patient Position Erect or seated Left side against cassette unless patient complains is on right side then do right lateral if departmental protocol includes this option Top of cassette 1&1/2 inch above. Lateral Chest (Left or Right Lateral) Left Lateral Chest.

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  • Patient Position

  • Erect or seated

  • Left side against cassette unless patient

  • complains is on right side then do right

  • lateral if departmental protocol includes this option

  • Top of cassette 1&1/2 inch above

  • Lateral Chest (Left or Right Lateral)

  • Left Lateral Chest

Part position

MSP parallel To cassette

Coronal plane perpendicular to cassette

Shoulders resting against cassette

Armed raised and crossed over head

Center thorax to cassette

Make exposure at end of second fulinspiration

72 inches FFD is recommended


  • Central Ray

    perpendicular directed to mid thorax

  • Center Point

    At level of T7(3-4 inches below jugular notch )

  • Structure shown

    Superimposed lungs & diaphragm, trachea, bronchus, major vessels, heart thoracic cage


Patient Position

  • Oblique chest

  • (Right Anterior Oblique RAO) or

  • (Left Anterior Oblique LAO)

  • Standing or seated

  • Adjust coronal plane 45 degrees

  • Top of cassette 2 inch above shoulder

  • Part position

  • Shoulder nearest cassette rolled posteriorly

  • Hand placed on hip

  • Opposite hand placed on top ofcassetteholder

  • Center thorax to cassette

  • Exposed on full inspiration

  • 72 inches FFD is recommended

  • Both oblique may be taken

  • Central Ray

  • Perpendicular

  • Center Point

  • At level of T6


  • Structure shown

  • Lung from the apex to the costophrenic angle, great vessels and heart out line

  • (For Anterior obliques the side of interest is the farthest from the film. Thus RAO

  • will best visualize the left lung )


Patient Position

  • Oblique chest

  • (Right Posterior Oblique RPO) or

  • (Left Posterior Oblique LPO)

  • Standing or seated

  • Adjust coronal plane 45 degrees

  • Top of cassette 2 inch above shoulder

  • Part position

  • Patient rotated 45 degrees with right posterior

  • Shoulder against cassette forRPO

  • Patient rotated 45 degrees with leftposterior

  • Shoulder against cassette forLPO

  • Arm closest to film raised on head

  • Other arm placed on hip with palm out

  • Exposure after 2nd full inspiration

  • 72 inches FFD is recommended

  • Both oblique may be taken


  • Central Ray

    Perpendicular

  • Center Point

    At level of T6

  • Structure shown

    Lung from the apex to the costophrenic angle, great vessels and heart out line

  • Note:

  • Posterior obliques best visualize the side closest to the film

  • (Posterior oblique position show the same anatomy as the

  • opposite anterior oblique. Thus the LPO corresponds to the RAO and the RPO to the LAO)

  • If the patient unable to stand oblique recumbent can be done


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