Effectiveness of the air-gap method for reducing radiation dose in neonate CT examinations.

IF 1.7 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Radiological Physics and Technology Pub Date : 2024-11-05 DOI:10.1007/s12194-024-00855-1

Takanori Masuda, Yoshinori Funama, Takeshi Nakaura, Tomoyasu Sato, Takayuki Oku, Atsushi Ono, Kazuo Awai

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Abstract

The air-gap method is a technique employed to control dose distribution and radiation scattering in medical imaging. By introducing a layer of air between the radiation source and the object, this method effectively reduces the impact of scattered radiation. The purpose of this study was to investigate the suitability of the air-gap method for radiation dose reduction in pediatric patients during computed tomography (CT) examinations. Only one type of neonate phantom is used with 64 detector-row CT scanner while helical scanning the chest. The distance between the CT table and the subject was 0 mm at the conventional method and 150 mm at the air-gap method. The values of the real-time skin dosimeter on the dorsal surface of the body, and on the left and right mammary glands and image noise are measured and compared for each method. Compared with the conventional method, it was possible to reduce the exposure dose and image noise by approximately 10% and 15%, respectively, using the air-gap method (p < 0.05). The air-gap method was useful for reducing the radiation dose during pediatric CT examinations compared with the conventional method.

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气隙法降低新生儿 CT 检查辐射剂量的有效性。

气隙法是一种用于控制医学成像中剂量分布和辐射散射的技术。通过在辐射源和物体之间引入一层空气，这种方法能有效减少散射辐射的影响。本研究的目的是调查气隙法是否适用于在计算机断层扫描（CT）检查中减少儿科患者的辐射剂量。在对胸部进行螺旋扫描时，64 个探测器排的 CT 扫描仪只使用一种类型的新生儿模型。采用传统方法时，CT 台与受检者之间的距离为 0 毫米，而采用气隙法时为 150 毫米。测量并比较了每种方法下人体背部、左右乳腺的实时皮肤剂量计值和图像噪声。与传统方法相比，使用气隙法可以将照射剂量和图像噪声分别降低约 10%和 15%（p＜0.05）。

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来源期刊

Radiological Physics and Technology RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-

CiteScore

3.00

自引率

12.50%

发文量

期刊介绍： The purpose of the journal Radiological Physics and Technology is to provide a forum for sharing new knowledge related to research and development in radiological science and technology, including medical physics and radiological technology in diagnostic radiology, nuclear medicine, and radiation therapy among many other radiological disciplines, as well as to contribute to progress and improvement in medical practice and patient health care.