Garcia, M. J. (2009). Image quality is undergoing constant refinement, and the number of uninterpretable coronary studies has gradually decreased from 20% to 40% using four-detector, to 15% to 25% with 16-detector, and is now as low as 3% to 10% with 64-detector systems. Preface. Cardiology clinics, 27(4), xv.