Mask failure

Case contributed by Dr Jayanth Keshavamurthy

Presentation

History of coronary artery disease and prior coronary stents presenting with chest pain.

Patient Data

Age: 80 years
Gender: Male
Nuclear medicine

These images from Cedar Sinai software showing the cardiac borders on stress gated images are not contoured correctly.

So the software gives the mask failure error and so study has to be reprocessed correctly.

Below it was processed on 4 DM software.

Nuclear medicine

4 DM software showing that the contours of the heart borders are correct and the ejection fraction was calculated adequately.

Case Discussion

Important to recognize mask failure errors in post processing. Here it is obvious and there are times it will be more subtle and may alter our impression.

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