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Digital tomosynthesis: a new technique for imaging nephrolithiasis. Specific organ doses and effective doses compared with renal stone protocol noncontrast computed tomography.

Publication ,  Journal Article
Neisius, A; Astroza, GM; Wang, C; Nguyen, G; Kuntz, NJ; Januzis, N; Ferrandino, MN; Yoshizumi, TT; Preminger, GM; Lipkin, ME
Published in: Urology
February 2014

OBJECTIVE: To determine organ-specific doses (ODs) and effective dose (ED) for digital tomosynthesis (DT) and compare it with our institutional renal stone protocol noncontrast computed tomography (NCCT). METHODS: A validated anthropomorphic male phantom was placed supine on a digital GE Definium 8000 radiological scanner. Thermoluminescent dosimeters were placed in 256 locations and used to measure OD. A routine DT study was performed consisting of 2 scout images and 1 tomographic sweep in a 14.2-degree arc over the phantom. Software is used to recreate a series of coronal images from the sweep. ODs were determined as the sum of the doses for the study. Equivalent doses were calculated by multiplying OD with the appropriate tissue weighting factor. ED is the summation of the equivalent doses. OD and ED were determined in a similar fashion (using dosimeters) for a renal stone protocol NCCT and doses were compared. RESULTS: ODs for DT are significantly lower compared with NCCT. The ED for NCCT is 3.04 ± 0.34 mSv. The calculated ED for DT is 0.87 ± 0.15 mSv (2 scouts at 0.17 mSv and 0.14 mSv and 1 sweep at 0.56 mSv), P <.0001. CONCLUSION: DT exposes patients to substantially less radiation than NCCT. This is particularly true for radiation-sensitive organs. Further studies are needed to compare the sensitivity and specificity of DT as compared with NCCT. However, its low overall radiation dose makes it an ideal study for the follow-up of recurrent stone formers in the office setting.

Duke Scholars

Published In

Urology

DOI

EISSN

1527-9995

Publication Date

February 2014

Volume

83

Issue

2

Start / End Page

282 / 287

Location

United States

Related Subject Headings

  • Urology & Nephrology
  • Tomography, X-Ray Computed
  • Radiographic Image Enhancement
  • Radiation Dosage
  • Phantoms, Imaging
  • Nephrolithiasis
  • Male
  • Humans
  • 3202 Clinical sciences
  • 1103 Clinical Sciences
 

Citation

APA
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ICMJE
MLA
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Neisius, A., Astroza, G. M., Wang, C., Nguyen, G., Kuntz, N. J., Januzis, N., … Lipkin, M. E. (2014). Digital tomosynthesis: a new technique for imaging nephrolithiasis. Specific organ doses and effective doses compared with renal stone protocol noncontrast computed tomography. Urology, 83(2), 282–287. https://doi.org/10.1016/j.urology.2013.10.004
Neisius, Andreas, Gaston M. Astroza, Chu Wang, Giao Nguyen, Nicholas J. Kuntz, Natalie Januzis, Michael N. Ferrandino, Terry T. Yoshizumi, Glenn M. Preminger, and Michael E. Lipkin. “Digital tomosynthesis: a new technique for imaging nephrolithiasis. Specific organ doses and effective doses compared with renal stone protocol noncontrast computed tomography.Urology 83, no. 2 (February 2014): 282–87. https://doi.org/10.1016/j.urology.2013.10.004.
Neisius, Andreas, et al. “Digital tomosynthesis: a new technique for imaging nephrolithiasis. Specific organ doses and effective doses compared with renal stone protocol noncontrast computed tomography.Urology, vol. 83, no. 2, Feb. 2014, pp. 282–87. Pubmed, doi:10.1016/j.urology.2013.10.004.
Neisius A, Astroza GM, Wang C, Nguyen G, Kuntz NJ, Januzis N, Ferrandino MN, Yoshizumi TT, Preminger GM, Lipkin ME. Digital tomosynthesis: a new technique for imaging nephrolithiasis. Specific organ doses and effective doses compared with renal stone protocol noncontrast computed tomography. Urology. 2014 Feb;83(2):282–287.
Journal cover image

Published In

Urology

DOI

EISSN

1527-9995

Publication Date

February 2014

Volume

83

Issue

2

Start / End Page

282 / 287

Location

United States

Related Subject Headings

  • Urology & Nephrology
  • Tomography, X-Ray Computed
  • Radiographic Image Enhancement
  • Radiation Dosage
  • Phantoms, Imaging
  • Nephrolithiasis
  • Male
  • Humans
  • 3202 Clinical sciences
  • 1103 Clinical Sciences