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Routine: Profile and Axial AP
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♦ PROFILE:
► Patient Positioning - Position in Profile:
• Position the patient in an erect profile position, sitting or standing, with the shoulders with the RI
vertical.
► Position of the Party:
• Align the middle coronal plane with the RC and the tabletop and/or the RI.
• Center the RI with the RC, which should leave the top of the RI about 3 to 5 cm above the acoustic meatus
external (MAE).
• Press the shoulders (for equal weights for both arms [see Note 2]).
• Ask the patient to relax and drop the shoulders down and forward as much as possible.
(Do this as a last step before exposure because this position is difficult to maintain.)
• Extend the chin (to prevent the jaw from overlapping the upper vertebrae).
► RC:
• RC perpendicular to RI.
• Direct the RC horizontally to C4 (level of the upper margin of the thyroid cartilage).
• Centralize the RI to the RC.
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♦ Axial AP:
► Patient Positioning - Supine or Upright Position:
• Position the patient in a supine or upright position, with arms at the side.
► Position of the Party:
• Align the midsagittal plane with the RC and the center of the table and/or the RI.
• Adjust the head so that the line from the lower margin of the upper incisors to the base of the skull
(mastoid tips) is perpendicular to the table and/or to the RI. Line from the tip of the jaw to the base
of the skull must be parallel to the angled CR.
• Make sure there is no rotation of the head or chest.
► RC:
• Head angle of RC from 15° to 20°.
• Direct the RC to enter the level of the lower margin of the thyroid cartilage to pass through
of C4.
• Centralize the RI with the RC.
►DFOFI: 1m (AP) / 1.50m (Profile)
►RI: 18x24 (Longitudinal)
♦ Kenneth L. Bontrager, 8th Edition. #Radiology
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