Patient history

77 years-old woman who suffered from thoracic constrictive pain. The first cardiac CT scan (5.2 mSv dose, prospective gating) revealed a possible stenosis on the LAD artery but the coronarography was negative.

A second cardiac CT scan was performed 9 months later as the patient continued to experience thoracic constrictive pain.

Technique

The follow-up cardiac CT exam was performed 9 months later on the new Discovery CT750 HD (GE Healthcare), using cardiac mode, ASiR reconstruction and High Definition mode with prospective ECG-gating (100 kV, 175 mAs). The resulting dose was 1 mSv* (DLP= 63 mGy.cm*).

* Obtained using from EUR-16262 EN with chest factor of DLP*0.017

Findings

Discovery CT750 HD
Nine months later, on the follow-up exam performed on the Discovery CT750 HD, it was possible to evaluate the stenosis severity (about 50%), and high a spatial resolution reduced calcium blooming to clearly see vessel lumen.

Conclusion

“The follow-up study was performed on the Discovery CT750 HD at 20% of the original dose. Additionally, the higher spatial resolution of the CT750 HD allowed me to better evaluate the stenosis and clearly see the vessel lumen as calcium blooming is significantly reduced.”
J.L. Sablayrolles, M.D.

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