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KMID : 0357520130360040273
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Journal of Radiological Science and Technology
2013 Volume.36 No. 4 p.273 ~ p.280
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Comparison Study on CNR and SNR of Thoracic Spine Lateral Radiography
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Kim Ki-Won
Min Jung-Whan
Lyu Kwang-Yeul
Kim Jung-Min
Jeong Hoi-Woun
Lee Joo-Ah
Jung Jae-Hong
Sung Dong-Chan
Park Soon-Cheol
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Abstract
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This study was proven for the T-spine breathing technique in lateral projection, using computer radiography (CR), charge coupled device (CCD), indirect digital radiography (IDR) and direct digital radiography (DDR). All images were evaluated and compared with CNR and SNR measured with the mean pixels and the standard deviation as setting ROI of spinous process, pedicle, vertebral body, intervertebral foramen and intervertebral disk using Image J. In experiment results of 4 type detectors, T-spine breathing technique was indicated as excellent in ROI of spinous process, pedicle, vertebral body, intervertebral foramen and intervertebral disk. As T-spine breathing technique indicated excellent images compared to the existing T-spine lateral radiography, this method would be useful for elderly patients who have difficulty in deep exhalation. This study was indicated the application possibility of T-spine breathing technique by presenting contrast to noise ratio (CNR) and signal to noise ratio (SNR) with quantitative value in 4 type detectors.
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KEYWORD
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contrast to noise ratio (CNR), signal to noise ratio (SNR)
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