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CCTA (without dose modulation) = 15 mSv
Diagnostic invasive coronary angiography = 3-10 mSv
SPECT sestamibi = 12 mSv
SPECT thallium = 25mSv
CXR = .04 mSv
Standard chest CT = 7 mSv
Average background radiation in the U.S. = 3.6 mSv
CCTA technology is expected to significantly improve in the near future. A viable 256 detector CT has been produced and has scanned several patients in Japan. However, the detector race for more and smaller detectors has probably reached a plateau. A dual source CT with two x ray tubes is currently available. This technology increases the temporal resolution and a recent paper has demonstrated the accurate evaluation of patients with higher heart rates. Flat panel detectors promise to significantly improve the spatial resolution of CCTA. This will allow the improved evaluation of restenosis in coronary stents.
Coronary CT angiography is a promising new tool in the work-up and management of CAD. As this modality gains acceptance, more studies will likely show definitive clinical indications, which will continue to improve the care we give to our patients in the Martha Jefferson Hospital community.
Coronary CT angiography is a promising new tool in the work-up and management of CAD. As this modality gains acceptance, more studies will likely show definitive clinical indications, which will continue to improve the care we give to our patients in the Martha Jefferson Hospital community.