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VCT vs HD CCTA Exam 92% Dose Reduction James P Earls MD Fairfax Radiological Consultants, Fairfax VA Inova Fairfax Hospital, Falls Church VA.

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Presentation on theme: "VCT vs HD CCTA Exam 92% Dose Reduction James P Earls MD Fairfax Radiological Consultants, Fairfax VA Inova Fairfax Hospital, Falls Church VA."— Presentation transcript:

1 VCT vs HD CCTA Exam 92% Dose Reduction James P Earls MD Fairfax Radiological Consultants, Fairfax VA Inova Fairfax Hospital, Falls Church VA

2 History 53 yr old male –Had chest pain 2 years ago –Echo, ECG and nuclear stress study all negative CCTA 2006 –retrospectively gated study on VCT system –showed 90% LAD –Cath confirmed; 5.0 mm bare metal stent placed CCTA 2009 –Some recurrent CP several months ago –Prospectively gated, ASIR reconstruction on HD system –No evidence of restenosis

3 Scan Techniques GE HD CT750 Scan parameters –Prospective gating –0 msec padding –30% Volume ASIR –High Res mode –350 mA, kV 120 Contrast –80 cc 5.5 cc/sec Radiation Dose –CTDI vol 8.22 mGy –DLP 115 mGy-cm –Effective dose 1.61 mSv GE VCT Scan parameters –Retrospective gating –ECG modulation –717 mA, kV 120 Contrast –80 cc 5.5 cc/sec Radiation Dose –CTDI vol 78.6 mGy –DLP 1419 mGy-cm –Effective dose 19.8 mSv 92% Dose Reduction!!!

4 Whole Heart View VCT Exam 8/2006HD Exam 2/2009

5 Tree VR View VCT Exam 8/2006HD Exam 2/2009

6 MIP View VCT Exam 8/2006HD Exam 2/2009

7 LAD VCT Exam 8/2006HD Exam 2/2009

8 LAD VCT Exam 8/2006HD Exam 2/2009

9 Cath Views Pre-StentPost-Stent

10 Cath Views VCT (8/2006)Cath (8/2006)

11 Cath Views HD study (2/2009)Post-Stent (8/2006)

12 CCTA on the HD


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