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http://dx.doi.org/10.7742/jksr.2020.14.5.677

Usability Evaluation of Lateral Sliding Table in CT Examination  

Choi, Jeong Hun (Department of Radiology, Dongshin University)
Kong, Chang gi (Department of Radiology, Dongshin University)
Song, Jong Nam (Department of Radiology, Dongshin University)
Han, Jae Bok (Department of Radiology, Dongshin University)
Publication Information
Journal of the Korean Society of Radiology / v.14, no.5, 2020 , pp. 677-684 More about this Journal
Abstract
Miscentering in the left and right X axis direction during CT examination affects dose and quality. When the CT Gantry Isocenter and the center of the examination objective are matched using the Lateral Sliding Table, the image quality is improved and the exposure dose is reduced. CTDI Head Phantom (Kimda, Korea) and dosimeter (Ray Safe, Sweden) were used to measure dose comparison CTDI (mGy) due to center deviation, and Water Phantom (HITACHI, Japan) was used to measure noise to see the difference in uniformity due to center deviation. Measurements of doses for dose comparison CTDI (mGy) with a deviation showed that doses were consistently reduced and exact dose was not projected until they were moved to 80 mm by 20 mm from the Isocenter. SD values were measured to see the difference in uniformity due to center deviation and the noise continued to increase until it was moved by 20 mm to 80 mm. The range of collimation has increased by the extent of deviating from the center and the range of exposure has increased. Using the Lateral Sliding Table, you can easily adjust the Isocenter, increase the quality of the image by adjusting the Isocenter in areaa such as the cardiac examination of the location away from the Isocenter, Extreme bone and Shoulder, and greatly reduce the collimation to the Isocenter, so it can be used to reduce unnecessary exposure dose.
Keywords
Exposure Dose; Nosie; Isocenter; Lateral Sliding Table;
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Times Cited By KSCI : 2  (Citation Analysis)
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