HU Measurement of Urinary Stone according to the Tube Voltage and Slice Thickness in Non-enhancement MDCT

비조영증강 MDCT에서 관전압과 절편 두께에 따른 요로결석의 HU 측정

  • Dong, Kyung-Rae (Department of Radiological Technology, Gwangju Health University) ;
  • Jung, Myung-Jin (Department of Diagnostic Radiology, Chosun University Hospital) ;
  • Jeon, Jae-Doo (Department of Diagnostic Radiology, Chosun University Hospital) ;
  • Kim, Mi-Hyun (Department of Radiological Technology, Gwangju Health University) ;
  • Kweon, Dae-Cheol (Department of Radiological Science, Shinhan University) ;
  • Chung, Woon-Kwan (Department of Nuclear Engineering, Chosun University)
  • 동경래 (광주보건대학교 방사선과) ;
  • 정명진 (조선대학교병원 영상의학과) ;
  • 전재두 (조선대학교병원 영상의학과) ;
  • 김미현 (광주보건대학교 방사선과) ;
  • 권대철 (신한대학교 방사선학과) ;
  • 정운관 (조선대학교 원자력공학과)
  • Received : 2018.02.26
  • Accepted : 2018.05.30
  • Published : 2018.06.30

Abstract

To distinguish urinary stones, we tried to identify the components of urinary stone using HU of nonenhancement MDCT. HU was measured according to the tube voltage and the slice thickness of the section of urinary stone. After injecting urinary stone into a small plastic bottle, experimental phantom was prepared using pork similar to human body. 640 slice MDCT. HU of urinary stone was measured according to each tube voltage and slice thickness in the obtained images. HU of urinary stones according to tube voltage were 135 kVp ($373.68{\pm}30.20HU$), 100 kVp ($525.94{\pm}44.93HU$) and 80 kVp ($691{\pm}80.80HU$), and the slice thickness was 0.5 mm ($752{\pm}25.71HU$) minimum ($545.96{\pm}29.89HU$), 1.5 mm ($462.68{\pm}46.35HU$), 2 mm ($360.43{\pm}66.19HU$). It was found that the HU of urinary stone was increased with decreasing tube voltage, and the HU of urinary stone was decreased with increasing thickness of the section. Non-enhancement MDCT for urinary stone is thought to be useful for the diagnosis of urinary stone using thin slice thickness using low tube voltage.

Keywords

Acknowledgement

Supported by : Chosun University

References

  1. Borghi L, Schianchi T, Meschi T, Guerra A, Allegri F, Maggiore U and Novarini A. 2002. Comparison of two diets for the prevention of recurrent stones in idiopathic hypercalciuria. N. Engl. J. Med. 346(2):77-84. https://doi.org/10.1056/NEJMoa010369
  2. Kakinuma R, Ohmatsu H, Kaneko M, Eguchi K, Naruke T, Nagai K, Nishiwaki Y, Suzuki A and Moriyama N. 1999. Detection failures in spiral CT screening for lung cancer: analysis of CT findings. Radiology. 212(1):61-66. https://doi.org/10.1148/radiology.212.1.r99jn1461
  3. Kim HS, Jang SW, Jeong YB, Kim YG and Kim JS. 2003. The usefulness of unenhanced helical computerized tomography in patients with urinary calculi. Korean J. Urol. 44(8):796-800.
  4. Lee MW, Jeong YB and Kim YG. 2006. Biochemical characteristics of serum and urine in the patients with uric acid stone. Korean J. Urol. 47(7):712-716. https://doi.org/10.4111/kju.2006.47.7.712
  5. Lee SJ, Kim DK, Rho SK, Huh JS, Lee HL, Lee CH, Chang SG and Kim JI. 1996. Clinical observations in 4468 cases of patients with urinary stones. Korean J. Urol. 37(8):877-887.
  6. Leusmann DB, Niggemann H, Roth S and Ahlen HV. 1995. Recurrence rates and severity of urinary calculi. Scand. J. Urol. Nephrol. 29(3):279-283. https://doi.org/10.3109/00365599509180576
  7. Levine JA, Neithlich J, Verga M, Dalrymple NK and Smith RC. 1997. Ureteral calculi in patients with flank pain correlation of plain radiography with unenhanced helical CT. Radiology. 204(1):27-31. https://doi.org/10.1148/radiology.204.1.9205218
  8. Mitcheson HD, Zamenhof RG, Bankoff MS and Prien EL. 1983. Determination of the chemical composition of urinary calculi by computerized tomography. J. Urol. 130(4):814-9. https://doi.org/10.1016/S0022-5347(17)51472-X
  9. Mostafavi MR, Ernst RD and Saltzman B. 1998. Accurate determination of chemical composition of urinary calculi by spiral computerized tomography. J. Urol. 159(3):673-675. https://doi.org/10.1016/S0022-5347(01)63698-X
  10. Nakada SY, Hoff DG, Attai S, Heisey D, Blankenbaker D and Pozniak M. 2000. Determination of stone composition by noncontrast spiral computed tomography in the clinical setting. Urology. 55(6):816-819. https://doi.org/10.1016/S0090-4295(00)00518-5
  11. Newhouse JH, Prien EL, Amis ES Jr, Dretler SP and Pfister RC. 1984. Computed tomographic analysis of urinary calculi. Am. J. Roentgenol. 142(3):545-548. https://doi.org/10.2214/ajr.142.3.545
  12. Saw KC, McAteer JA, Monga AG, Chua GT, Lingeman JE and Williams JC Jr. 2000. Helical CT of urinary calculi: effect of stone composition, stone size, and scan collimation. Am. J. Roentgenol. 175(2):329-332. https://doi.org/10.2214/ajr.175.2.1750329
  13. Sierakowski R, Finlayson B, Landes RR, finlayson CD and Sierakowski N. 1978. The frequency of urolithiasis inhospital discharge diagnosis in the United States. Invest. Urol. 15(6):438-441.
  14. Uribarri J, Oh MS and Carroll HJ. 1989. The first kidney stone. Ann. Intern. Med. 111(12):1006-1009. https://doi.org/10.7326/0003-4819-111-12-1006
  15. Yilmaz S, Sindel T, Arslan G, Ozkaynak C, Karaali K, Kabaalioglu A and Lueleci E. 1998. Renal colic: comparison of spiral CT, US and IVU in the detection of ureteral calculi. Eur. Radiol. 8(2):212-217. https://doi.org/10.1007/s003300050364
  16. Zarse CA, McAteer JA, Tann M, Sommer AJ, Kim SC, Paterson RF, Halt EK. Lingeman JE and Willimams JC Jr. 2004. Helical computed tomography accurately reports urinary stone composition using attenuation values: in vitro verification using high-resolution micro-computed tomography calibrated to fourier transform infrared microspectroscopy. Urology. 63(5):828-833. https://doi.org/10.1016/j.urology.2003.11.038