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Japanese Journal of Radiology

Erschienen in:

25.07.2021 | Original Article

Effect of energy level on the spatial resolution and noise frequency characteristics of virtual monochromatic images: a phantom experiment using four types of CT scanners

verfasst von: Shigeru Suzuki, Rika Fukui, Shingo Harashima, Wakana Samejima

Erschienen in: Japanese Journal of Radiology | Ausgabe 1/2022

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Abstract

Purpose

The purpose of the study is to evaluate the effect of energy level on the modulation transfer functions (MTF) and noise power spectra (NPS) of virtual monochromatic images (VMIs) obtained using four types of computed-tomographic (CT) scanners: Revolution, SOMATOM, IQon, and Aquilion.

Materials and methods

VMIs were obtained at 70, 60, and 50 kiloelectron volts (keV), and also at the lowest keV available in each scanner. We evaluated the MTF and NPS in the VMIs obtained at each keV.

Results

No significant effect of the energy level on the MTF was observed in IQon, whereas the spatial resolution decreased as the energy level decreased in the other types of scanners. The NPS curves tended to increase as the energy levels decreased with three types of scanners other than Aquilion.

Conclusion

The spatial resolution and noise frequency characteristics of VMIs may be affected by the energy level, and the effects of energy level on these characteristics differ depending on the type of CT scanners.

Johnson TR. Dual-energy CT: general principles. AJR Am J Roentgenol. 2012;199:S3-8.CrossRef

Otrakji A, Digumarthy SR, Gullo RL, Flores EJ, Shepard JO, Kalra MK. Dual-energy CT: spectrum of thoracic abnormalities. Radiographics. 2016;36:38–52.CrossRef

Patel BN, Marin D. Strategies to improve image quality on dual-energy computed tomography. Radiol Clin North Am. 2018;56:641–7.CrossRef

Marin D, Boll DT, Mileto A, Nelson RC. State of the art: dual-energy CT of the abdomen. Radiology. 2014;271:327–42.CrossRef

Matsumoto K, Jinzaki M, Tanami Y, Ueno A, Yamada M, Kuribayashi S. Virtual monochromatic spectral imaging with fast kilovoltage switching: improved image quality as compared with that obtained with conventional 120-kVp CT. Radiology. 2011;259:257–62.CrossRef

Jung DC, Oh YT, Kim MD, Park M. Usefulness of the virtual monochromatic image in dual-energy spectral CT for decreasing renal cyst pseudoenhancement: a phantom study. AJR Am J Roentgenol. 2012;199:1316–9.CrossRef

Agrawal MD, Pinho DF, Kulkarni NM, Hahn PF, Guimaraes AR, Sahani DV. Oncologic applications of dual-energy CT in the abdomen. Radiographics. 2014;34:589–612.CrossRef

Yu L, Leng S, McCollough CH. Dual-energy CT-based monochromatic imaging. AJR Am J Roentgenol. 2012;199:S9–15.CrossRef

Bamberg F, Dierks A, Nikolaou K, Reiser MF, Becker CR, Johnson TR. Metal artifact reduction by dual energy computed tomography using monoenergetic extrapolation. Eur Radiol. 2011;21:1424–9.CrossRef

10.

Yu L, Christner JA, Leng S, Wang J, Fletcher JG, McCollough CH. Virtual monochromatic imaging in dual-source dual-energy CT: radiation dose and image quality. Med Phys. 2011;38:6371–9.CrossRef

11.

Lenga L, Lange M, Arendt CT, Booz C, Yel I, Bodelle B, et al. Measurement reliability and diagnostic accuracy of virtual monoenergetic dual-energy CT in patients with colorectal liver metastases. Acad Radiol. 2020;27:e168–75.CrossRef

12.

Lenga L, Czwikla R, Wichmann JL, Leithner D, Albrecht MH, Booz C, et al. Dual-energy CT in patients with colorectal cancer: improved assessment of hypoattenuating liver metastases using noise-optimized virtual monoenergetic imaging. Eur J Radiol. 2018;106:184–91.CrossRef

13.

Lenga L, Czwikla R, Wichmann JL, Leithner D, Albrecht MH, D’Angelo T, et al. Dual-energy CT in patients with abdominal malignant lymphoma: impact of noise-optimised virtual monoenergetic imaging on objective and subjective image quality. Clin Radiol. 2018;73:833.e19-833.e27.CrossRef

14.

D’Angelo T, Lenga L, Arendt CT, Bucher AM, Peterke JL, Caruso D, et al. Carotid and cerebrovascular dual-energy computed tomography angiography: optimization of window settings for virtual monoenergetic imaging reconstruction. Eur J Radiol. 2020;130:109166.CrossRef

15.

Leithner D, Mahmoudi S, Wichmann JL, Martin SS, Lenga L, Albrecht MH, et al. Evaluation of virtual monoenergetic imaging algorithms for dual-energy carotid and intracerebral CT angiography: Effects on image quality, artefacts and diagnostic performance for the detection of stenosis. Eur J Radiol. 2018;99:111–7.CrossRef

16.

Bae K, Jeon KN, Cho SB, Park SE, Moon JI, Baek HJ, et al. Improved opacification of a suboptimally enhanced pulmonary artery in chest CT: experience using a dual-layer detector spectral CT. AJR Am J Roentgenol. 2018;210:734–41.CrossRef

17.

Tomita H. Is advanced monoenergetic imaging ready for clinical routine? An in-depth image quality analysis. 2016. ECR. https://doi.org/10.1594/ecr2016/C-0438.

18.

Orth RC, Wallace MJ, Kuo MD, Technology Assessment Committee of the Society of Interventional Radiology. C-arm cone-beam CT: general principles and technical considerations for use in interventional radiology. J Vasc Interv Radiol. 2009;20:S538–44.CrossRef

19.

Paul J, Jacobi V, Farhang M, Bazrafshan B, Vogl TJ, Mbalisike EC. Radiation dose and image quality of X-ray volume imaging systems: cone-beam computed tomography, digital subtraction angiography and digital fluoroscopy. Eur Radiol. 2013;23:1582–93.CrossRef

20.

Padole A, Singh S, Ackman JB, Wu C, Do S, Pourjabbar S, et al. Submillisievert chest CT with filtered back projection and iterative reconstruction techniques. AJR Am J Roentgenol. 2014;203:772–81.CrossRef

21.

Mileto A, Guimaraes LS, McCollough CH, Fletcher JG, Yu L. State of the art in abdominal CT: the limits of iterative reconstruction algorithms. Radiology. 2019;293:491–503.CrossRef

22.

Li K, Garrett J, Ge Y, Chen GH. Statistical model based iterative reconstruction (MBIR) in clinical CT systems. Part II. Experimental assessment of spatial resolution performance. Med Phys. 2014;41:071911.CrossRef

23.

Yu L, Vrieze TJ, Leng S, Fletcher JG, McCollough CH. Technical note: measuring contrast- and noise-dependent spatial resolution of an iterative reconstruction method in CT using ensemble averaging. Med Phys. 2015;42:2261–7.CrossRef

24.

Cao Q, Zbijewski W, Sisniega A, Yorkston J, Siewerdsen JH, Stayman JW. Multiresolution iterative reconstruction in high-resolution extremity cone-beam CT. Phys Med Biol. 2016;61:7263–81.CrossRef

25.

Sugawara H, Suzuki S, Katada Y, Ishikawa T, Fukui R, Yamamoto Y, et al. Comparison of full-iodine conventional CT and half-iodine virtual monochromatic imaging: advantages and disadvantages. Eur Radiol. 2019;29:1400–7.CrossRef

26.

Viallefont-Robinet F, Helder D, Fraisse R, Newbury A, van den Bergh F, Lee D, et al. Comparison of MTF measurements using edge method: towards reference data set. Opt Express. 2018;26:33625–48.CrossRef

27.

Slavic S, Madhav P, Profio M, Crotty D, Nett E, Hsieh J, et al. GSI Xtream on Revolution CT—GE healthcare technology white paper. (2017). https://www.gehealthcare.com/-/media/069734962cbf45c1a5a01d1cdde9a4cd.pdf. Accessed 4 April 2021.

28.

Suzuki S, Fukui R, Yamamoto Y, Nakayama S, Suzuki M, Kuwahara S. Evaluation of spatial resolution of virtual monochromatic imaging in vitro: effect of energy level and contrast. J Comput Assist Tomogr. 2021;45:93–7.CrossRef

29.

McCollough CH, Yu L, Kofler JM, Leng S, Zhang Y, Li Z, et al. Degradation of CT low-contrast spatial resolution due to the use of iterative reconstruction and reduced dose levels. Radiology. 2015;276:499–506.CrossRef

30.

Goenka AH, Herts BR, Obuchowski NA, Primak AN, Dong F, Karim W, et al. Effect of reduced radiation exposure and iterative reconstruction on detection of low-contrast low-attenuation lesions in an anthropomorphic liver phantom: an 18-reader study. Radiology. 2014;272:154–63.CrossRef

31.

Schindera ST, Odedra D, Raza SA, Kim TK, Jang HJ, Szucs-Farkas Z, et al. Iterative reconstruction algorithm for CT: can radiation dose be decreased while low-contrast detectability is preserved? Radiology. 2013;269:511–8.CrossRef

32.

Baker ME, Dong F, Primak A, Obuchowski NA, Einstein D, Gandhi N, et al. Contrast-to-noise ratio and low-contrast object resolution on full- and low-dose MDCT: SAFIRE versus filtered back projection in a low-contrast object phantom and in the liver. AJR Am J Roentgenol. 2012;199:8–18.CrossRef

33.

Miéville FA, Gudinchet F, Brunelle F, Bochud FO, Verdun FR. Iterative reconstruction methods in two different MDCT scanners: physical metrics and 4-alternative forced-choice detectability experiments–a phantom approach. Phys Med. 2013;29:99–110.CrossRef

34.

Omotayo A, Elbakri I. Objective performance assessment of five computed tomography iterative reconstruction algorithms. J Xray Sci Technol. 2016;22(24):913–30.

35.

Ghetti C, Palleri F, Serreli G, Ortenzia O, Ruffini L. Physical characterization of a new CT iterative reconstruction method operating in sinogram space. J Appl Clin Med Phys. 2013;14:4347.CrossRef

36.

Kalisz K, Rassouli N, Dhanantwari A, Jordan D, Rajiah P. Noise characteristics of virtual monoenergetic images from a novel detector-based spectral CT scanner. Eur J Radiol. 2018;98:118–25.CrossRef

37.

Husarik DB, Gordic S, Desbiolles L, Krauss B, Leschka S, Wildermuth S, et al. Advanced virtual monoenergetic computed tomography of hyperattenuating and hypoattenuating liver lesions: ex-vivo and patient experience in various body sizes. Invest Radiol. 2015;50:695–702.CrossRef

38.

De Cecco CN, Caruso D, Schoepf UJ, De Santis D, Muscogiuri G, Albrecht MH, et al. A noise-optimized virtual monoenergetic reconstruction algorithm improves the diagnostic accuracy of late hepatic arterial phase dual-energy CT for the detection of hypervascular liver lesions. Eur Radiol. 2018;28:3393–404.CrossRef

39.

Okamura T, Yamada Y, Yamada M, Yamazaki A, Shiraga N, Jinzaki M. Image quality of virtual monochromatic images obtained using 320-detector row CT: a phantom study evaluating the effects of iterative reconstruction and body size. Eur J Radiol. 2017;95:212–21.CrossRef

Titel: Effect of energy level on the spatial resolution and noise frequency characteristics of virtual monochromatic images: a phantom experiment using four types of CT scanners
verfasst von: Shigeru Suzuki
Rika Fukui
Shingo Harashima
Wakana Samejima
Publikationsdatum: 25.07.2021
Verlag: Springer Singapore
Erschienen in: Japanese Journal of Radiology / Ausgabe 1/2022
Print ISSN: 1867-1071
Elektronische ISSN: 1867-108X
DOI: https://doi.org/10.1007/s11604-021-01180-y

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Effect of energy level on the spatial resolution and noise frequency characteristics of virtual monochromatic images: a phantom experiment using four types of CT scanners

Abstract

Purpose

Materials and methods

Results

Conclusion

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Purpose

Materials and methods

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Conclusion

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