Objectives:

Remember to instruct the patient to move their head to the left or right so as not to hit them with the detector. The aim of this projection is to demonstrate the mid / distal LAD, free from overlap of the OM1. The proximal LAD is often overlapped by the Circumflex.

Catheter Positioning:

The catheter should be positioned in the upper left corner of the screen before the start of the acquisition.

Alternatives:

More CRA (eg. CRA 50):

Separates the proximal circumflex from the proximal LAD, however the distal circumflex (if long) is now overlapping the LAD. This angle can not often be achieved due to patient and/or equipment limitations.

Less CRA (eg. CRA 30):

Demonstrates the mid / distal circumflex well. The LAD is often overlapped by diagonals and the OM1. Overlapping of the proximal circumflex and proximal LAD.

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