Radiation dose and image quality for adult interventional cardiology in Chile: a national survey
| Autor: | Edith Valenzuela, Eliseo Vano, Fernando Leyton, Carlos Oyarzun, Patricia Miranda, Carlos Ubeda |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Adult
medicine.medical_specialty Image quality Cardiology Radiation Dosage Radiography Interventional Imaging phantom DICOM Kerma medicine Image Processing Computer-Assisted Fluoroscopy Humans Polymethyl Methacrylate Radiology Nuclear Medicine and imaging Chile Image resolution Radiation Radiological and Ultrasound Technology medicine.diagnostic_test Interventional cardiology business.industry Phantoms Imaging Radiation dose Public Health Environmental and Occupational Health Heart General Medicine Nuclear medicine business |
| Zdroj: | Radiation protection dosimetry. 147(1-2) |
| ISSN: | 1742-3406 |
| Popis: | The aim of this work was to investigate the differences in dose settings and image quality among 10 X-ray systems used for interventional cardiology in Chile. Entrance surface air kerma (ESAK) was measured on a phantom of 20 cm thickness of polymethyl methacrylate slabs. Image quality was evaluated using DICOM images of a test object Leeds TOR 18-FG for cine mode acquisition, through the numerical parameters signal-to-noise ratio (SNR), high-contrast spatial resolution (HCSR) and figure of merit. ESAK rate values for fluoroscopy modes ranged between 7.1 and 121.7 mGy min(-1). For cine mode, ESAK values per frame ranged from 63 to 400 µGy fr(-1). SNR and HCSR parameters for cine mode varied from 4.8 to 8.6 and 0.4 to 10, respectively. FOM values resulted from 6.9 to 64.5 among the different X-ray systems. Results show important differences between systems and point out the need to launch an optimisation programme. |
| Databáze: | OpenAIRE |
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