In cardiac and coronary evaluation, the use of CT and magnetic resonance is gaining popularity over the more conventional techniques. However, it requires the use of advanced postprocessing techniques for visualization and (quantitative) evaluation of the acquired datasets. Many techniques exist and are available to the radiologist on commercially available workstations, but each clinical question requires its own approach. Using the correct technique enables accurate evaluation and diagnosis, but caution and knowledge is needed to achieve correct interpretation of the qualitative and quantitative results and to avoid use of inappropriate visualization or evaluation.

Optimal postprocessing of images following cardiac examination using CT and MRI

Summary
Traditionally, myocardial perfusion imaging by CT has been hampered by limited detector size and stability of Hounsfield Units in moving cardiac acquisition modes. In the present article, we describe the technical principles of a novel, dynamic heart shuttle scan acquisition using a second generation dual source CT system (SOMATOM Definition Flash, Siemens Healthcare, Forchheim, Germany). With simultaneous injection of iodinated contrast agent, this protocol allows for sequential assessment of myocardial enhancement with reasonable radiation exposure of less than 10 mSv. We also present the case of a 69-year-old male patient who underwent dynamic CT-based myocardial perfusion imaging to determine the hemodynamic relevance of a stenosis in the left anterior descending coronary artery.

Myocardial Stress Perfusion with a Novel Dual-Source CT Scanner – Technical Update and Initial Clinical Experience

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Myocardial Stress Perfusion with a Novel Dual-Source CT Scanner – Technical Update and Initial Clinical Experience