20-Segment Model (ASNC)

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20-Segment Model (ASNC)

In SPECT nuclear cardiology studies a 20-segment model has also been used [2]. It is similar to the 17-segment model, but the apical part is divided into 8 segments instead of 5 as illustrated by the polar arrangement below.

PCARD 20-Segment Model Polar Plot

 


Basal Segments


Mid-cavity Segments


Apical Segments

1.

basal anterior

7.

mid anterior

13.

apical anterior

2.

basal anteroseptal

8.

mid anteroseptal

14.

apical anteroseptal

3.

basal inferoseptal

9.

mid inferoseptal

15.

apical inferoseptal

4.

basal inferior

10.

mid inferior

16.

apical inferior

5.

basal inferolateral

11.

mid inferolateral

17.

apical inferolateral

6.

basal anterolateral

12.

mid anterolateral

18.

apical anterolateral





19.

anteroapical





20.

inferoapical