Patient history

56 year-old woman who underwent a first optical colonoscopy that showed a lesion in the hepatic flexure that could not be resected. She was then referred to a second invasive colonoscopy that revealed a lesion in the splenic flexure which could also not be excised. Patient was eventually referred to a CT Colonoscopy for surgical planning.

Technique

The CT Colonoscopy exam was performed on the Discovery CT750 HD. Ultra Low-dose parameter settings were used (20 to 25 mAs, 100 kV, 1.375 pitch, ASiR image reconstruction) for the colon scan (430 mm coverage). Resulting dosewas 1.13mSv* (DLP=67mGy.cm).

* Obtained using EUR-16262 EN with abdomen factor of DLP*0.015 and a pelvis factor of DLP*0.019

Findings

A polypoid was discovered in the transverse colon, and later confirmed by surgery.

Conclusion

“On this patient, the CT Colonoscopy exam provided the right information for an accurate diagnosis. Additionally, the GE Discovery CT750 HD system and ASiR reconstruction allowed us to drastically reduce the dose to 1.1mSv for this CT Colonoscopy exam.”

V. Barrau, M.D.

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