The effect of compensating filter on image quality in lateral projection of thoraco lumbar radiography

9th National Seminar on Medical Physics

物理学;医药卫生

Daud, N.A.A.^1 ; Ali, M.H.^2 ; Nazri, N. A. Ahmad^1 ; Hamzah, N.J.^1 ; Awang, N.A.^2

Centre of Foundation Studies, Universiti Teknologi MARA, Puncak Alam, Selangor

42000, Malaysia^1

Faculty of Health Sciences, Universiti Teknologi MARA, Puncak Alam, Selangor

42000, Malaysia^2

关键词: Depth value;    Different thickness;    Exposed to;    Lumbar regions;    Optimal filter;    X-ray units;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/546/1/012002/pdf
DOI  :  10.1088/1742-6596/546/1/012002

学科分类：卫生学

来源: IOP

【 摘 要 】

The aim of this project was to study the effect of compensating filter on image quality in lateral projection of thoraco lumbar radiography. The specific objectives of this study were to verify the relationship between density, contrast and noise of lateral thoraco lumbar radiography using various thickness of compensating filter and to determine the appropriate filter thickness with the thoraco lumbar density. The study was performed by an X- ray unit exposed to the body phantom where different thicknesses of aluminium were used as compensating filter. The radiographs were processed by CR reader and being imported to KPACS software to analyze the pixel depth value, contrast and noise. Result shows different thickness of aluminium compensating filter improved the image quality of lateral projection thoraco lumbar radiography. The compensating filter of 8.2 mm was considered as the optimal filter to compensate the thoraco lumbar junction (T12-L1), 1 mm to compensate lumbar region and 5.9 mm to compensate thorax region. The addition of aluminium compensating filter is advantageous in terms of efficiency which saving radiograph film, workload of the radiographer and radiation dose to patient.