Lateral Projection of Abdomen

Saturday, February 21, 2015

A lateral view demonstrate, abdominal soft tissue masses, umbilical hernia, prevertebral region for possible aneurysms of aorta or calcification. This projection may be performed for localization of foreign bodies.

Technical Factors, Shielding

IR size - 35 x 43 ( 14 x 17 inches), lengthwise to table
Moving or stationary grid
80 to 85 kV range
Lead blocker placed on table behind patient to reduce scatter
Use gonadal shields on males.

Patient and Part Position:

Patient in lateral recumbent position on right or left side, pillow for head
Elbows flexed, arms up, knees and hips partially flexed, pillow between knees to maintain a lateral position
Align midcoronal plane with CR and midline of table.
Ensure that pelvis and thorax are not rotated but are in a true lateral position.

Central Ray, Collimation and Patient Respiration:

CR perpendicular to table, centered approximately 2 inches (5cm) above level of iliac crest to midcoronal plane
IR centered to CR
Minimum SID of 40 inches (100cm)
Collimate closely to upper and lower IR borders and to anterior and posterior skin borders to minimize scatter.
Suspend breathing on expiration.

Radiographic Criteria on Lateral View of Abdomen

Structure Shown and Proper Positioned

Diaphragm and as much of lower abdomen as possible should be included.
Air-filled loops of bowel in abdomen with soft tissue detail should be visible in prevertibral and anterior abdomen regions.
Right Lateral View Abdomen
No rotation as evident by superimposition of posterior ribs and posterior borders of iliac wings and bilateral ASIS.

Collimation and CR:

Collimation borders to tissue margins of anterior and posterior abdomen.
Center of collimation field (CR) to prevertebral region about 2 inches (5 cm) above level of illiac crest.

Exposure Criteria:

No motion: rib and gas bubble margins appear sharp.
Lumbar vertibrae may appear about 50% underexposed with soft tissue detail visible in anterior abdomen and in prevertibral region of lower lumbar vertabrae.

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