Total views : 241

The Research on the Volume of Artificial Structure by the Change of Scan Parameter in CT Inspection

Affiliations

  • Department Radiology, Dongshin University, Korea, Republic of
  • Department Radiology Chonnam National University Hospital, Korea, Republic of

Abstract


Background/Objectives: The globular and rectangular artificial structures were prepared in order to compare the actually measured volume with the CT image volume obtained by using modified scan parameters, and to compare the errors of these volumes. Methods/Statistical Analysis: A plastic with 57.3 Mℓ globular artificial structures and a rectangular artificial structure filled with a 1.9 ℓ contrast medium mixed with distilled water at a ratio of 1:20 were placed on a table. The image data of the following conditions were obtained, namely, 5 mm, 3.75 mm, 2.5 mm, 1.25 mm, and 0.625 mm slice thicknesses; 100 kv and 120 kv tube voltages; 100 mA and 200 mA tube currents; 0% and 50% overlapped slice spaces; standard algorithm; and bone scan parameters. Findings: The volume changes in the rectangular artificial structure were less than those in the globular artificial structure. Other than the slice thickness, the effects of slice space, tube voltage, tube current, bone algorithm or standard algorithm on the image quality, and the volumes of the actual model and obtained image were insignificant. The thinner slice of the scan parameter enhanced the volume accuracy of the obtained image, while the thicker slice reduced the image distortion and accuracy. Application/Improvements: CT image accuracy and optimization are significantly dependent on the slice space. Therefore, a thin slice is absolutely required to obtain accurate CT images that are used for facial and cranial measurement in forensic medicine and dentistry, tests for restoration, liver transplant, and artificial joint tests.

Keywords

Artificial Structure, CT Inspection, CT Parameter, CT Volume, Slice Thicknesses.

Full Text:

 |  (PDF views: 199)

References


  • United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), report to the General Assembly, annex on medical exposures. New York. Available from: www.unscear.org/unscear/publications.html, Data accessed: 2010.
  • Dougeni E, Faulkner K, Panayiotakis G. A review of patient dose and optimisation methods in adult and pediatric CT scanning. European Journal Radiology. 2012 Apr; 81(4):665–83.
  • Payne JT. CT radiation dose and image quality. Radiol Clin North Am. 2005 Nov; 43(6):953–62.
  • Cho SD. Developing Optimized the Computed Tomography (CT) Scan Protocols to the Reduction in CT Radiation Exposure Dose: Evaluated the Image Quality by using an AAPM Performance Phantom. Dept of Biomedical Health Science, Graduate School of Dong-eui University. 2015; 47(10):27–40.
  • International Commission on Radiological Protection, recommendations of the International Commission on Radiological Protection. ICRP publication. Available from: www.icrp.org/.../ICRP_Publication_103-Annals_of_the_ICRP, Data accessed: 1990.
  • UM KD, Lee BD . Influence of Slice thickness of Computed Tomography and type of Rapid Prototyping on the Accuracy of a 3 dimensional medical model. Korean J Oral Maxillofac Radiol. 2004 Mar; 34(1):13–8.
  • Asaumi J, Kawai N, Honda Y, Shigehara H, Wakasa T, Kishi K. Comparison of three dimensional computed tomography with rapid prototype models in the management of coronoid hyperplasia. Dentomaxillofacial Radiology. 2001 Aug; 30(1):330–5.
  • Matteson SR, Bechtold W, Phillips C, Staab EV. A Method for Three-dimensional Image Reformation for Quantitative Cephalometric Analysis. Journal of Oral and Maxillofacial Surgery. 1989 Oct; 47 (10):1053–61.
  • Kragskov J, Sindet Pedersen S, Gyldensted C, Jensen KL. A Comparison of Three-dimensional Computed Tomography Scans and Stereolithographic Models for Evaluation of Craniofacial Anomalies. Journal of Oral and Maxillofacial Surgery. 1996 Apr; 54 (4):402–11.
  • Kim KD, Kim HJ, Han SH, Park CS. Anthropologic study of Korean mandible using three-dimensional computed tomography-evaluation of the accuracy of a three-dimensional image. Korean J phys Anthropol. 1999 Jun; 12(1):13–22.

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.