Value of Diffusion Tensor Imaging of Prostate Cancer: Comparison with Systemic Prostate Biopsy

전립선암의 확산텐서영상의 유용성: 규칙적 생검 결과와의 비교

  • Yoon, Seong-Kuk (Department of Radiology, Dong-A University, Medical Center) ;
  • Kim, Dong-Won (Department of Radiology, Dong-A University, Medical Center) ;
  • Ha, Dong-Ho (Department of Radiology, Dong-A University, Medical Center) ;
  • Kwon, Hee-Jin (Department of Radiology, Dong-A University, Medical Center) ;
  • Kang, Myong-Jin (Department of Radiology, Dong-A University, Medical Center) ;
  • Choi, Sun-Seob (Department of Radiology, Dong-A University, Medical Center) ;
  • Nam, Kyung-Jin (Department of Radiology, Dong-A University, Medical Center) ;
  • Kim, Jung-Il (Department of Occupational Medicine, Dong-A University, Medical Center)
  • 윤성국 (동아의대병원 영상의학과) ;
  • 김동원 (동아의대병원 영상의학과) ;
  • 하동호 (동아의대병원 영상의학과) ;
  • 권희진 (동아의대병원 영상의학과) ;
  • 강명진 (동아의대병원 영상의학과) ;
  • 최순섭 (동아의대병원 영상의학과) ;
  • 남경진 (동아의대병원 영상의학과) ;
  • 김정일 (동아의대병원 산업의학과)
  • Published : 2011.02.01

Abstract

Purpose: This study was performed to evaluate the usefulness of diffusion tensor imaging (DTI) and to correlate systemic twelve biopsy in prostate cancer. Materials and Methods: Thirty-one patients with suspected prostate cancer underwent MR imaging. DTI was performed prior to a prostate biopsy. We prospectively calculated the apparent diffusion coefficient (ADC) and fractional anisotropy (FA) value in each corresponding biopsy site. Results: Twenty-three of 31 patients had histopathologically proven adenocarcinoma. Among the 276 biopsy cores of 23 patients with prostate cancer, 109 cores showed positive results (39%). The ADC and FA value of positive cores were $1.31{\pm}0.34{\times}10^{-3}mm^{2}/s$ and $0.68{\pm}0.07$, and those of the negative cores were $1.74{\pm}0.45{\times}10^{-3}mm^{2}/s$ and $0.54{\pm}0.09$, respectively. Eight patients without carcinoma showed an ADC value of $1.83{\pm}0.26{\times}10^{-3}mm^{2}/s$ and an FA value of $0.47{\pm}0.07$. The ADC and FA value of positive cores were significantly lower and higher than those of negative cores and cancer-free patients, respectively (p < 0.05). Conclusion: The ADC and FA values using DTI may provide useful diagnostic information in the differentiation of cancerous tissues, although there is overlap in some cases.

목적: 전립선암 진단에서 규칙적 12분 생검(system twelve biopsy) 결과와 연관하여 확산텐서영상의 유용성을 평가하는 것이다. 대상과 방법: 전립선암이 의심되는 31명의 환자에서 자기공명영상과 확산텐서영상을 얻었다. 이후 경직장초음파 유도하에 생검을 하였고, 전향적으로 생검 위치에 해당하는 부위에서 겉보기확산계수(apparent diffusion coefficient (ADC) 과 fractional anisotropy (FA)를 측정하였다. 결과: 31명 중 23명이 조직학적으로 샘암종으로 판명되었다. 23명의 276개의 검체 중에서 109개가 암 양성 소견을 보였다(39%). 양성 검체의 ADC와 FA는 $1.31{\pm}0.34{\times}10^{-3}mm^{2}/s$$0.68{\pm}0.07$ 이었다. 음성 검체의 ADC와 FA는 $1.74{\pm}0.45{\times}10^{-3}mm^{2}/s$$0.54{\pm}0.09$이었다. 전립선암이 없는 8명의 검체의 ADC와 FA는 $1.83{\pm}0.26{\times}10^{-3}mm^{2}/s$$0.47{\pm}0.07$이었다. 전립선암 환자의 양성 검체를 전립선암 환자의 음성 검체와 암이 없는 환자의 검체와 비교하였을 때 의미있게 ADC는 낮았고 FA는 높았다(p < 0.05). 결론: 확산텐서영상을 이용한 ADC와 FA의 측정은 일부 중복을 보이나 암 조직과 정상 조직을 감별하는데 도움이 될 수 있다.

Keywords

References

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