The Diagnostic Accuracy, Image Quality and Radiation Dose of 64-Slice Dual-Source CT in Daily Practice: a Single Institution's Experience
Korean Journal of Radiology
;
: 308-318, 2011.
Article
in English
| WPRIM
| ID: wpr-225542
ABSTRACT
OBJECTIVE:
We wanted to evaluate the image quality, diagnostic accuracy and radiation exposure of 64-slice dual-source CT (DSCT) coronary angiography according to the heart rate in symptomatic patients during daily clinical practice. MATERIALS ANDMETHODS:
We performed a retrospective search for the DSCT coronary angiography reports of 729 consecutive symptomatic patients. For the 131 patients who underwent invasive coronary angiography, the image quality, the diagnostic performance (sensitivity, specificity, positive predictive value [PPV] and negative predictive value [NPV] for detecting significant stenosis > or = 50% diameter) and the radiation exposure were evaluated. These values were compared between the groups with differing heart rates (HR) mean HR or = 65 and HR variability (HRV) or = 15.RESULTS:
Among the 729 patients, the CT reports showed no stenosis or insignificant coronary artery stenosis in 72%, significant stenosis in 26% and non-diagnostic in 2%. For the 131 patients who underwent invasive coronary angiography, 95% of the patients and 97% of the segments were evaluable, and the overall per-patient/per-segment sensitivity, the perpatient/per-segment specificity, the per-patient/per-segment PPV and the per-patient/per-segment NPV were 100%/90%, 71%/98%, 95%/88% and 100%/97%, respectively. The image quality was better in the HR or = 65 group (p = 0.001), but there was no difference in diagnostic performance between the two groups. The mean effective radiation doses were lower in the HR < 65 or HRV < 15 group (p < 0.0001) 5.5 versus 6.7 mSv for the mean HR groups and 5.3 versus 9.3 mSv for the HRV groups.CONCLUSION:
Dual-source CT coronary angiography is a highly accurate modality in the clinical setting. Better image quality and a significant radiation reduction are being rendered in the lower HR group.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Quality Assurance, Health Care
/
Radiation Dosage
/
Radiographic Image Interpretation, Computer-Assisted
/
Tomography, X-Ray Computed
/
Predictive Value of Tests
/
Retrospective Studies
/
Sensitivity and Specificity
/
Coronary Angiography
/
Artifacts
/
Contrast Media
Type of study:
Diagnostic study
/
Observational study
Limits:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
Language:
English
Journal:
Korean Journal of Radiology
Year:
2011
Type:
Article
Similar
MEDLINE
...
LILACS
LIS