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RAD141-Chap 7-Ankle

RAD141 - Chap 7 - Ankle projections

Should screens or grids be used on an ankle projection? screens - regular; no grid
What should the SID be for an ankle? 40 inches
How should ankle projections be collimated? to include base of 5th metatarsal
What are the routine ankle projections? supplementary? routine -> AP, medial oblique - mortise, lateral; supplementary -> 45 degree oblique (routine for trauma)
What sizes of film s/b used for AP ankle? 1) 11 x 14 divided transversely into thirds; 2) 10 x 12 divided transversely in half; 3) 8 x 10
What is the patient position for AP ankle? patient in supine position (pillow under head), legs fully extended, foot dorsiflexed 90 deg, plantar surface perpendicular to film
How should the tube be angled and what position should the CR be in for AP ankle? tube should be angled perpendicular to film; central ray perpendicular through ankle joint, midway between the malleoli
What is the patient position for AP oblique projction - ankle - w/medial rotation? patient in supine position (pillow under head); legs fully extended w/good dorsiflexion; plantar surface perpendicular to film; medially rotate so that malleoli are paralell to the film (15 - 20 deg)
What film size s/b used with medial oblique ankle? 1/2 of 10 x 12
What is the tube angulation and CR position for medial oblique ankle? tube angle s/b perpendicular to film; central ray through the ankle joint (midway between malleoli)
What is another name for the medial oblique ankle? AP Mortise projection
Created by: debmurph