Curriculum vitae
Dual Energy- Single Source vs Dual Source
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The following question has been sent by Daniel Newman: I am asked frequently about the difference between dual energy and dual source. It seems that for most people the terms are interchangeble. However, not all CT systems utilize 2 tubes. Can you explain to me the pros and cons of each … Read more
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Concerning a recent publication on the accuracy of MDCT 64
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Sofiane Hadjadj, MD, Montreal, has sent the following question: concerning a recent publication on accuracy of the MDCT 64: according to the study published in the NEJM Volume 359:2324-2336 \”The patient-based diagnostic accuracy of quantitative CT angiography for detecting or ruling out stenoses of 50% or more according to conventional angiography revealed … Read more
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Quadruple, patent coronary artery bypass grafts
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Case history Five years following quadruple CABG surgery, this 64-year-old patient started experiencing atypical chest pain. Question Are any of the bypass grafts or anastomoses stenotic or occluded? Is there an extra-cardiac cause behind the patient‘s symptoms? Diagnosis/Differential diagnosis Acute graft thrombosis, myocardial infarction, myocardial ischemia due to graft stenosis, aortic dissection, pulmonary embolism, pericarditis, … Read more
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Resolution of Definition Axial Datasets
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The following question has been sent by Judy Oltmann, CTA Technologist, USA: My question may have appeared vaque before. My radiology group has had a consistent complaint concerning the mottle or graininess, both terms applied, to the axial datasets acquired during our coronary scans with the Definition scanner. We have applied … Read more
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Protocol Cardiac: Bypass Grafts
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Please, click on the title to see the protocol. Read more
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Thrombosed venous bypass graft – pseudoaneurysm following coil embolization
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Case history This 67-year-old patient post CABG was admitted due to recurrent chest pain following microcoil embolization of his saphenous venous graft pseudoaneurysm performed at another institution. Question What is the cause of … Read more
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Cardiac: Bypass Grafts
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Dual Source coronary CT angiography (cCTA) is not only faster than previous scanner generations and less invasive than cardiac catheterization, it also may in some cases more realiably localize proximal bypass anastomoses and provide more anatomic information crucial to the success of potential redo coronary artery bypass graft (CABG) surgery. Dual … Read more
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