Back to Search
Start Over
Evaluation of optimal match between gantry rotation time and cardiac cycle on multislice spiral CT coronary angiography imaging.
- Source :
-
European review for medical and pharmacological sciences [Eur Rev Med Pharmacol Sci] 2014; Vol. 18 (23), pp. 3619-28. - Publication Year :
- 2014
-
Abstract
- Objective: To evaluate the relationship between gantry rotation time, heart rate and image quality during multislice spiral CT coronary angiography (MSCTCA).<br />Patients and Methods: Data of 83 patients who underwent MSCTCA were reviewed. Based on the ratio between cardiac cycle and gantry rotation time, the patients were divided into two groups. Patients whose heart rates fell in the resonance frequency (the cardiac cycle / gantry rotational time ratio of 1.5, 2 or 2.5) ± 2 bpm were classified as synchronous (25 cases), while the remaining 58 patients (included a subgroup of 34 cases in whom heart rates were the same as in synchronous group but who had a different gantry rotation time). comprised the asynchronous group. Image qualities were compared between both groups.<br />Results: In the synchronous group, most (199/287; 69.33%) images were poor. When gantry rotation time was changed in the subgroup of the asynchronous group, the majority (423/442 or 95.70%) of images improved. There was a significant difference (p < 0.001) in the image quality among these patients. In 58 patients from asynchronous group, 757 segments of coronary arteries were evaluated, and 716 segments were of best quality (716/757; 94.58%).<br />Conclusions: When heart rate and gantry rotation time correlate and synchronous, the so-called frequency harmonics, coronary artery image quality is poor. However, by changing gantry rotation time to avoid the harmonic helps to improve the image quality on MSCTCA. Based on the patient's heart rate, appropriate gantry rotation time can be selected in order to avoid resonance and obtain high quality images.
- Subjects :
- Adult
Aged
Aged, 80 and over
Coronary Angiography methods
Female
Humans
Image Processing, Computer-Assisted methods
Image Processing, Computer-Assisted standards
Male
Middle Aged
Multidetector Computed Tomography methods
Time Factors
Tomography, Spiral Computed methods
Tomography, Spiral Computed standards
Coronary Angiography standards
Coronary Vessels diagnostic imaging
Coronary Vessels physiology
Heart Rate physiology
Multidetector Computed Tomography standards
Rotation
Subjects
Details
- Language :
- English
- ISSN :
- 2284-0729
- Volume :
- 18
- Issue :
- 23
- Database :
- MEDLINE
- Journal :
- European review for medical and pharmacological sciences
- Publication Type :
- Academic Journal
- Accession number :
- 25535131