Renal cystic lesions characterization using spectral detector CT (SDCT): Added value of spectral results

To evaluate the added value of spectral results derived from Spectral Detector CT (SDCT) to the characterization of renal cystic lesions (RCL). This retrospective study was approved by the local Institutional review board. 70 consecutive patients who underwent abdominopelvic SDCT and had at least on...

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Vydáno v:British journal of radiology Ročník 92; číslo 1100; s. 20180915
Hlavní autoři: Kessner, Rivka, Große Hokamp, Nils, Ciancibello, Les, Ramaiya, Nikhil, Herrmann, Karin A.
Médium: Journal Article
Jazyk:angličtina
Vydáno: England The British Institute of Radiology 01.08.2019
Témata:
Aged
Female
Humans
Kidney - diagnostic imaging
Kidney Diseases, Cystic - diagnostic imaging
Kidney Neoplasms - diagnostic imaging
Male
Radiographic Image Interpretation, Computer-Assisted - methods
Retrospective Studies
Signal-To-Noise Ratio
Tomography, X-Ray Computed - methods
ISSN:0007-1285, 1748-880X, 1748-880X
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Shrnutí:To evaluate the added value of spectral results derived from Spectral Detector CT (SDCT) to the characterization of renal cystic lesions (RCL). This retrospective study was approved by the local Institutional review board. 70 consecutive patients who underwent abdominopelvic SDCT and had at least one RCL were included. 84 RCL were categorized as simple, complex or neoplastic based on attenuation values on single-phase post-contrast images. Attenuation values were measured in each lesion on standard conventional CT images (stCI) and virtual monoenergetic images of 40keV and 100keV. A spectral curve slope was calculated and intra lesional iodine concentration (IC) was measured using iodine-density maps. Reference standard was established using histopathologic correlation, prior and follow-up imaging. Analysis of variance (ANOVA) was used to compare between the groups. Mean attenuation values for benign simple and complex RCL differed significantly (42 ± 16 8 ± 3 HU; < 0.001). IC was almost identical in benign simple and complex RCL (0.23 ± 0.04 mg ml 0.24 ± 0.04 mg ml ), while IC in neoplastic RCL was significantly higher (2.10 ± 0.08 mg ml ; < 0.001). The mean spectral curve slope did not differ significantly between simple and complex RCL (0.30 ± 0.03 0.33 ± 0.05) but was significantly higher in neoplastic RCL (2.60 ± 0.10; < 0.001). Spectral results of SDCT are highly promising in distinguishing benign complex RCL from enhancing neoplastic RCL based on single-phase post-contrast imaging only. SDCT can assist in differentiating between benign complex and neoplastic renal cystic lesions.
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ISSN:0007-1285
1748-880X
1748-880X
DOI:10.1259/bjr.20180915