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Assessment of 70-keV virtual monoenergetic spectral images in abdominal CT imaging: A comparison study to conventional polychromatic 120-kVp images.

Publication ,  Journal Article
Rassouli, N; Chalian, H; Rajiah, P; Dhanantwari, A; Landeras, L
Published in: Abdominal radiology (New York)
October 2017

To evaluate the image quality of 70-keV virtual monoenergetic (monoE) abdominal CT images compared to 120-kVp polychromatic images generated from a spectral detector CT (SDCT) scanner.This prospective study included generation of a 120-kVp polychromatic dataset and a 70-keV virtual monoE dataset after a single contrast-enhanced CT acquisition on a SDCT scanner (Philips Healthcare) during portal venous phase. The attenuation values (HU), noise, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were measured in the liver, spleen, pancreas, kidney, aorta, portal vein, and muscle. The subjective image quality including noise, soft tissue contrast, sharpness, and overall image quality were graded on a 5-point Likert scale by two radiologists independently (1-worst image quality, 5-best image quality). Statistical analysis was performed using paired sample t test and Fleiss's Kappa.Fifty-five patients (54.3 ± 16.8 y/o; 28 M, 27 F) were recruited. The noise of target organs was significantly lower in virtual monoE images in comparison to polychromatic images (p < 0.001). The SNR and CNR were significantly higher in virtual monoE images (p < 0.001 for both). Subjective image quality of 70-keV virtual monoE images was significantly better (p < 0.001) for all evaluated parameters. Median scores for all subjective parameters were 3.0 versus 4.0 for polychromatic vs virtual monoE images, respectively. The inter-reader agreement for overall image quality was good (Kappa were 0.767 and 0.762 for polychromatic and virtual monoE images, respectively).In abdominal imaging, 70-keV virtual monoE CT images demonstrated significantly better noise, SNR, CNR, and subjective score compared to conventional 120-kVp polychromatic images.

Published In

Abdominal radiology (New York)

DOI

EISSN

2366-0058

ISSN

2366-004X

Publication Date

October 2017

Volume

42

Issue

10

Start / End Page

2579 / 2586

Related Subject Headings

  • Tomography, X-Ray Computed
  • Signal-To-Noise Ratio
  • Radiography, Abdominal
  • Radiographic Image Interpretation, Computer-Assisted
  • Prospective Studies
  • Middle Aged
  • Humans
  • Aged
  • Adult
 

Citation

APA
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ICMJE
MLA
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Rassouli, N., Chalian, H., Rajiah, P., Dhanantwari, A., & Landeras, L. (2017). Assessment of 70-keV virtual monoenergetic spectral images in abdominal CT imaging: A comparison study to conventional polychromatic 120-kVp images. Abdominal Radiology (New York), 42(10), 2579–2586. https://doi.org/10.1007/s00261-017-1151-2
Rassouli, Negin, Hamid Chalian, Prabhakar Rajiah, Amar Dhanantwari, and Luis Landeras. “Assessment of 70-keV virtual monoenergetic spectral images in abdominal CT imaging: A comparison study to conventional polychromatic 120-kVp images.Abdominal Radiology (New York) 42, no. 10 (October 2017): 2579–86. https://doi.org/10.1007/s00261-017-1151-2.
Rassouli N, Chalian H, Rajiah P, Dhanantwari A, Landeras L. Assessment of 70-keV virtual monoenergetic spectral images in abdominal CT imaging: A comparison study to conventional polychromatic 120-kVp images. Abdominal radiology (New York). 2017 Oct;42(10):2579–86.
Rassouli, Negin, et al. “Assessment of 70-keV virtual monoenergetic spectral images in abdominal CT imaging: A comparison study to conventional polychromatic 120-kVp images.Abdominal Radiology (New York), vol. 42, no. 10, Oct. 2017, pp. 2579–86. Epmc, doi:10.1007/s00261-017-1151-2.
Rassouli N, Chalian H, Rajiah P, Dhanantwari A, Landeras L. Assessment of 70-keV virtual monoenergetic spectral images in abdominal CT imaging: A comparison study to conventional polychromatic 120-kVp images. Abdominal radiology (New York). 2017 Oct;42(10):2579–2586.
Journal cover image

Published In

Abdominal radiology (New York)

DOI

EISSN

2366-0058

ISSN

2366-004X

Publication Date

October 2017

Volume

42

Issue

10

Start / End Page

2579 / 2586

Related Subject Headings

  • Tomography, X-Ray Computed
  • Signal-To-Noise Ratio
  • Radiography, Abdominal
  • Radiographic Image Interpretation, Computer-Assisted
  • Prospective Studies
  • Middle Aged
  • Humans
  • Aged
  • Adult