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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| Veröffentlicht in: | British journal of radiology Jg. 92; H. 1100; S. 20180915 |
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| Sprache: | Englisch |
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The British Institute of Radiology
01.08.2019
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| ISSN: | 0007-1285, 1748-880X, 1748-880X |
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| Abstract | 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. |
|---|---|
| AbstractList | 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. To evaluate the added value of spectral results derived from Spectral Detector CT (SDCT) to the characterization of renal cystic lesions (RCL).OBJECTIVESTo 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.METHODSThis 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 vs 8 ± 3 HU; p < 0.001). IC was almost identical in benign simple and complex RCL (0.23 ± 0.04 mg ml-1 vs 0.24 ± 0.04 mg ml-1), while IC in neoplastic RCL was significantly higher (2.10 ± 0.08 mg ml-1 ; p < 0.001). The mean spectral curve slope did not differ significantly between simple and complex RCL (0.30 ± 0.03 vs 0.33 ± 0.05) but was significantly higher in neoplastic RCL (2.60 ± 0.10; p < 0.001).RESULTSMean attenuation values for benign simple and complex RCL differed significantly (42 ± 16 vs 8 ± 3 HU; p < 0.001). IC was almost identical in benign simple and complex RCL (0.23 ± 0.04 mg ml-1 vs 0.24 ± 0.04 mg ml-1), while IC in neoplastic RCL was significantly higher (2.10 ± 0.08 mg ml-1 ; p < 0.001). The mean spectral curve slope did not differ significantly between simple and complex RCL (0.30 ± 0.03 vs 0.33 ± 0.05) but was significantly higher in neoplastic RCL (2.60 ± 0.10; p < 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.CONCLUSIONSSpectral 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.ADVANCES IN KNOWLEDGESDCT can assist in differentiating between benign complex and neoplastic renal cystic lesions. |
| Author | Große Hokamp, Nils Herrmann, Karin A. Kessner, Rivka Ramaiya, Nikhil Ciancibello, Les |
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| SubjectTerms | 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 |
| Title | Renal cystic lesions characterization using spectral detector CT (SDCT): Added value of spectral results |
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