Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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A Study on the Performance Evaluation and Use Status of Grid

격자의 성능평가와 이용실태에 관한 연구

  • Lee, Who-Min (Dept. of Radiotechnology, Dong Nam Junior Health College) ;
  • Kim, Hak-Sung (Dept. of Radiotechnology, Dong Nam Junior Health College) ;
  • Lee, Sang-Suk (Dept. of Radiotechnology, Dong Nam Junior Health College) ;
  • Oh, Hyun-Joo (Dept. of Radiotechnology, Sin gu Junior College) ;
  • Kim, Young-Il (Dept. of Radiotechnology, Sin gu Junior College) ;
  • Lim, Han-Young (Dept. of Radiotechnology, In San Junior College) ;
  • Kim, Heung-Tae (Dept. of Radiotechnology, Shin Heung Junior College) ;
  • Lee, In-Ja (Institute of Radiological Technology, Dong A X-ray Co., LTD.) ;
  • Huh, Joon (Institute of Radiological Technology, Dong A X-ray Co., LTD.)
  • 이후민 (동남보건전문대학 방사선과) ;
  • 김학성 (동남보건전문대학 방사선과) ;
  • 이상석 (동남보건전문대학 방사선과) ;
  • 오현주 (신구전문대학 방사선과) ;
  • 김영일 (신구전문대학 방사선과) ;
  • 임한영 (인산전문대학 방사선과) ;
  • 김흥태 (신흥전문대학 방사선과) ;
  • 이인자 (동아X선기계 방사선기술연구소) ;
  • 허준 (동아X선기계 방사선기술연구소)
  • Published : 1994.05.20
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Abstract

We have conducted on experiment with a purpose to evaluate the performance of grids being used at hospitals in Seoul and adjacent cities of Seoul. The results are as follows; Reality of the grids use 1. The focused grids were 105 and the parallel grids were 6 among 111 grids subject to experimenting. 2. The grid interspace material was aluminium of 94 and the remains were wood and bakelite. 3. The umber of Korean products from five companies was 33 and the one of the foreign products was 34 from companies. The physical properties have been examined by the notice of Department of Health and Social Affairs. 4. The intensity of secondary radiation was the highest in 5 : 1 grid ratio. 5. The Bucky factor increased with the increase of grid ratio. The selectivity, the grid improvement factor of grids also increased with increase of the grid ratio. However, with 6 : 1 grid ratio those factors were decreased exceptionally. In measurement of grid density with screen determiners and the beam alignment. 6. In evaluation the results were satifisfied within, 20%. 7. The value of the scale and the value of measurement were within the range of standard deviation, but the value of 103 lines were outranged from the standard deviation with all grid ratio except of 6 : 1 grid ratio.

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