1. Low radiation dose imaging of myocardial perfusion and coronary angiography with a hybrid PET/CT scanner
- Author
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Heikki Ukkonen, H. Sipilä, Juhani Knuuti, Mika Teräs, and Sami Kajander
- Subjects
Male ,medicine.medical_specialty ,Physiology ,Image quality ,Coronary Artery Disease ,Coronary Angiography ,Radiation Dosage ,Effective dose (radiation) ,Coronary artery disease ,Myocardial perfusion imaging ,hybrid imaging ,Oxygen Radioisotopes ,Predictive Value of Tests ,Physiology (medical) ,Medicine ,Humans ,cardiovascular diseases ,Prospective Studies ,Aged ,PET-CT ,medicine.diagnostic_test ,CTA ,business.industry ,Myocardial Perfusion Imaging ,General Medicine ,Original Articles ,Equipment Design ,Middle Aged ,medicine.disease ,PET ,Positron emission tomography ,Positron-Emission Tomography ,Angiography ,Feasibility Studies ,Radiographic Image Interpretation, Computer-Assisted ,Female ,Radiology ,business ,Nuclear medicine ,radiation dose ,Tomography, X-Ray Computed ,Perfusion ,Tomography, Spiral Computed ,CT - Abstract
Objectives: To test the image quality and feasibility of a sequential low radiation dose protocol for hybrid cardiac PET/CT angiography (CTA). Background: Multidetector computed tomography (MDCT) is a non-invasive method for coronary angiography. The negative predictive value of MDCT is high but perfusion imaging has a role in detecting functional significance of coronary lesions. This has encouraged combining these techniques. However, radiation dose is of concern. We report our first experiences with a low dose sequential CTA mode applicable to hybrid imaging. Methods: In the first phase, 10 consecutive cardiac MDCT angiographies were performed with spiral acquisition and compared in terms of image quality and dose with the following 10 patients performed with a new sequential mode. In the second phase, feasibility and radiation dose of a combined 15O-water rest-stress PET perfusion/sequential CTA protocol were assessed in another group of 61 consecutive patients. Results: Mean effective radiation dose was 60% lower in the sequential group than in the spiral group (19·3 versus 7·6 mSv, P
- Published
- 2009