한국방사선학회논문지 (Journal of the Korean Society of Radiology)

  • 제12권6호
  • /
  • Pages.785-791
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  • 2018
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  • 1976-0620(pISSN)
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  • 2384-0633(eISSN)
한국방사선학회 (The Korean Society of Radiology)
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PACS내 영상저장 장치의 데이터 전송

The Data Transmission of Image Storage System of PACS

  • 조의현 (삼성전자 의료기기사업부) ;
  • 박정규 (대구보건대학교 방사선과)
  • Cho, EuyHyun (Department of Medical Device, Samsung Electronics) ;
  • Park, Jeongkyu (Department of Radiologic Technology, Daege Health College)
  • 투고 : 2018.03.12
  • 심사 : 2018.11.30
  • 발행 : 2018.11.30
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초록

최근 PACS에서 장기간 저장장치로 디스크 배열이 많이 사용되고 있으나, 디스크에 대한 년 간 불량률에 관해서 신뢰성이 부족한 실정이다. 2016년 10월부터 2017년 2월까지 PACS 판독기에서 의료영상을 읽거나 저장하면서 하드디스크의 직렬포트단자를 조사하였으며, PACS 영상저장 장치에 사용되었던 하드디스크 98대와 개인용 컴퓨터에 사용되었던 하드디스크 101대에 저장된 데이터에서 전송률을 산출하였다. PACS 판독기에서 CT영상을 읽었을 경우에는 수십 MB이하 단위로 읽기는 87.8%, 쓰기는 12.2%가 수행되었다. PACS 판독기에서 CT 영상을 저장할 때는 수십 MB이하 단위로 읽기는 11.4%, 쓰기는 88.6%가 수행되었다. 개인용 컴퓨터에서 엑셀 파일을 읽을 경우에는 3 MB 이하단위로 읽기는 75%, 쓰기는 25%가 수행되었다. 개인용 컴퓨터에서 엑셀 파일 저장을 진행하면서 하드디스크와의 통신은 3 MB이하단위로 읽기는 38%, 쓰기는 62%가 수행되었다. PACS내 영상저장장치에 사용되는 하드디스크의 전송률은 10 GB/h, 개인용 컴퓨터의 하드디스크의 전송률은 5 GB/h로 나타났다. PACS내 영상저장에 사용되던 하드디스크의 년간 불량률은 0.97 ~ 1.13%를 보였고, 개인용 컴퓨터 내 하드디스크의 년간 불량률은 0.51~0.7%를 보였다. 전송량이 높을수록 년 간 불량률도 높아졌다. 이러한 결과는 하드디스크의 수명예측이나 연간 고장률을 예측하기 위한 기초 자료로 활용될 것이다.

Recently, Disk array is widely used as a long term storage device in PACS, but reliability is not enough in relation to annual failure rate of disk. Between October 2016 and February 2017, we scanned the serial port of the hard disk while reading or storing medical images on a PACS reader. The data rate was calculated from the data stored in HDD 99ea that were used in the PCAS image storage device and in HDD 101ea that were used in the Personal Computer. When a CT image was read from a PACS reader, Reading was 87.8% and Writing was 12.2% in units of several tens of megabytes or less. When the CT image was stored in the PACS reader, Reading was 11.4% and Writing was 88.6% in units of several tens of megabytes or less. While reading the excel file on the personal computer, Reading was 75% and Writing was 25% in less than 3 MB, and In the process of storing the excel file on the personal computer, Reading was carried out by 38% and Writing was carreid out 62% in the units of 3 MB or less. The transfer rate of the hard disk used in the PACS image storage device was 10 GB/h, and the transfer rate per hour of the hard disk of the personal computer was 5 GB / h. Annual failure rate of hard disk of image storage system is 0.97 ~ 1.13%, Annual failure rate of Hard Disk of personal computer is 0.97 ~ 1.13%. the higher transfer rate is, the higher annual failure rate is. These results will be used as a basis for predicting the life expectancy of the hard disk and the annual failure rate.

키워드

BSSHB5_2018_v12n6_785_f0001.png 이미지

Fig. 1. The analysis of communication between PACS and HDD during reading CT image.

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Fig. 2. The flowchart of command history during reading CT image.

BSSHB5_2018_v12n6_785_f0003.png 이미지

Fig. 3. The analysis of communication between PACS and HDD during saving CT image.

BSSHB5_2018_v12n6_785_f0004.png 이미지

Fig. 4. The flowchart of command history during saving CT image.

BSSHB5_2018_v12n6_785_f0005.png 이미지

Fig. 5. The analysis of communication between personal computer and HDD during reading excel file.

BSSHB5_2018_v12n6_785_f0006.png 이미지

Fig. 6. The flowchart of command history during reading excel file.

BSSHB5_2018_v12n6_785_f0007.png 이미지

Fig. 7. The analysis of communication between personal computer and HDD during saving excel file.

BSSHB5_2018_v12n6_785_f0008.png 이미지

Fig. 8. The flowchart of command history during saving excel file.

BSSHB5_2018_v12n6_785_f0009.png 이미지

Fig. 9. The probability plot of transfer capacity of PACS' HDD with giga byte unit per hour.

BSSHB5_2018_v12n6_785_f0010.png 이미지

Fig. 10. The probability plot of transmission capacity of personal computer's HDD with giga byte unit per hour.

BSSHB5_2018_v12n6_785_f0011.png 이미지

Fig. 11. Annual failure rate from 2009.11 to 2011.03 about PACS' HDD and personal computer's HDD.

참고문헌

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