Does digital flat detector technology tip the scale towards better image quality or reduced patient dose in interventional cardiology?
| Autor: | Evelien Bogaert, Hubert Thierens, Régine Lapere, Klaus Bacher |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
medicine.medical_specialty
Image quality X-ray detector Radiography Interventional Flat detector Sensitivity and Specificity law.invention law medicine Dosimetry Fluoroscopy X-Ray Intensifying Screens Radiology Nuclear Medicine and imaging Interventional cardiology medicine.diagnostic_test Phantoms Imaging business.industry Cardiovascular Surgical Procedures Reproducibility of Results Image intensifier Equipment Design General Medicine Equipment Failure Analysis Radiographic Image Enhancement Patient dose Nuclear medicine business Biotechnology |
| Zdroj: | European Journal of Radiology. 72:348-353 |
| ISSN: | 0720-048X |
| Popis: | As dynamic flat-panel detectors (FD) are introduced in interventional cardiology (IC), the relation between patient dose and image quality (IQ) needs to be reconsidered for this type of image receptor. On one hand this study investigates IQ of a FD system by means of a threshold contrast-detail analysis and compares it to an image intensifier (II) system on a similar X-ray setup. On the other hand patient dose for coronary angiography (CA) procedures on both systems is compared by Dose-Area Product (DAP)-registration of a patient population. The comparative IQ study was performed for a range of entrance dose rates (EDR) covering the fluoroscopy and cinegraphy working mode. In addition the IQ investigation was extended to a similar study under automatic brightness control (ABC). As well the systematic study of IQ as a function of EDR as the study performed under ABC point to a better IQ for FD in cinegraphy mode and no difference between both systems in fluoroscopy mode. The patient population study resulted in mean DAP values of 31 Gy cm2 (II system) and 33 Gy cm2 (FD system) (p = 0.68) for CA procedures. As well total DAP as contributions of fluoroscopy and cinegraphy on both systems are not significantly different. To conclude, we could state that profit was taken from the intrinsic better performance of the FD for cinegraphy mode in producing higher quality images in this mode but without any effect on patient dose for CA procedures. |
| Databáze: | OpenAIRE |
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