Imaging protocols for CT urography: results of a consensus conference from the French Society of Genitourinary Imaging

Renard-Penna, Raphaële; Rocher, Laurence; Roy, Catherine; André, M.; Bellin, Marie‐France; Boulay, Isabelle; Eiss, D.; Girouin, N.; Grenier, N.; Hélénon, O.; Lapray, Jean-François; Lefèvre, Arnaud; Matillon, X.; Ménager, Jean-Michel; Millet, Ingrid; Ronze, Sébastien; Sanzalone, Thomas; Tourniaire, Jean; Brunelle, Serge; Rouvière, Olivier

doi:10.1007/s00330-019-06529-6

Cited by 22 publications

(11 citation statements)

References 33 publications

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“…Based on the literature, it is clear that consistently opacifying the entire urinary tract at CTU remains a challenge. In addition to oral hydration and intravenous saline administration used in the CTU protocols in this study, other methods that have been proposed to improve image quality include changing patient position (such as log-rolling), abdominal compression, and the use of a diuretic [15][16][17].…”

Section: Ctu Technique-comparison To the Literaturementioning

confidence: 99%

Split vs. Single Bolus CT Urography: Comparison of Scan Time, Image Quality and Radiation Dose

2021

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The purpose of this study was to compare the scan time, image quality and radiation dose of CT urograms (CTU) using a split vs. single bolus contrast media injection technique. A total of 241 consecutive CTUs performed between August 2019-February 2020 were retrospectively reviewed. There were three study groups: Group 1, <50 years old, 50/80 cc split-bolus administered at 0 and 700 s post initiation of injection, with combined nephrographic and excretory phases; group 2, ≥50 years old, same split-bolus protocol; and group 3, ≥50 years old, 130 cc single bolus injection, with nephrographic and excretory phases acquired at 100 s and 460 s post injection initiation. The recorded data elements were scan time, number of excretory phases, imaging quality based on opacification of the urinary collecting system (<50%, 50–75%, 75–100%), and dose-length product (DLP). Associations between group and categorical variables were assessed (Chi-square); mean scan time and DLP were compared (one-way ANOVA). Following analysis, proportionally fewer CTUs required a repeat excretory phase in group 3 (32/112, 28.6%) than in groups 1 (25/48, 52.1%) and 2 (37/80, 46.3%) (p = 0.006). Mean scan time was significantly lower in group 3 (678 s) than in groups 1 (1046 s) and 2 (978 s) (p < 0.0001). There was no association between groups and image quality (p = 0.13). DLP was higher in group 3 (1422 ± 837 mGy·cm) than in groups 1 (1041 ± 531 mGy·cm) and 2 (1137 ± 646 mGy·cm) (p = 0.003). In conclusion, single bolus CTU resulted in significantly fewer repeat phases and faster scan time at the expense of a slightly higher radiation dose.

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Section: Ctu Technique-comparison To the Literaturementioning

confidence: 99%

Split vs. Single Bolus CT Urography: Comparison of Scan Time, Image Quality and Radiation Dose

2021

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“…In current clinical practice, easily accessible and noninvasive imaging tools such as pelvic CT and multiparametric MRI (mpMRI) provide immense assistance to clinicians for the preoperative diagnosis of BCa phenotypes (24,30,(36)(37)(38)(39)(40)(41)(42)(43). CT is mainly performed for evaluating the upper urinary tract and predicting lymph node metastasis of BCa (40,42,43). When clinicians identify the MIS, CT has drawbacks due to its limited soft-tissue contrast (40,42,43).…”

Section: Introductionmentioning

confidence: 99%

“…CT is mainly performed for evaluating the upper urinary tract and predicting lymph node metastasis of BCa (40,42,43). When clinicians identify the MIS, CT has drawbacks due to its limited soft-tissue contrast (40,42,43). In addition, radiation exposure is another concern (40,(42)(43)(44).…”

Section: Introductionmentioning

confidence: 99%

Study Progress of Noninvasive Imaging and Radiomics for Decoding the Phenotypes and Recurrence Risk of Bladder Cancer

Wang

Guo

et al. 2021

Front. Oncol.

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Urinary bladder cancer (BCa) is a highly prevalent disease among aged males. Precise diagnosis of tumor phenotypes and recurrence risk is of vital importance in the clinical management of BCa. Although imaging modalities such as CT and multiparametric MRI have played an essential role in the noninvasive diagnosis and prognosis of BCa, radiomics has also shown great potential in the precise diagnosis of BCa and preoperative prediction of the recurrence risk. Radiomics-empowered image interpretation can amplify the differences in tumor heterogeneity between different phenotypes, i.e., high-grade vs. low-grade, early-stage vs. advanced-stage, and nonmuscle-invasive vs. muscle-invasive. With a multimodal radiomics strategy, the recurrence risk of BCa can be preoperatively predicted, providing critical information for the clinical decision making. We thus reviewed the rapid progress in the field of medical imaging empowered by the radiomics for decoding the phenotype and recurrence risk of BCa during the past 20 years, summarizing the entire pipeline of the radiomics strategy for the definition of BCa phenotype and recurrence risk including region of interest definition, radiomics feature extraction, tumor phenotype prediction and recurrence risk stratification. We particularly focus on current pitfalls, challenges and opportunities to promote massive clinical applications of radiomics pipeline in the near future.

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“…The study by Renard-Penna et al [5] brings some semblance of order to the chaos of CTU techniques. The authors conducted a rigorous Delphi consensus conference on the topic of CTU technique.…”

mentioning

confidence: 99%

“…In summary, the studies by Renard-Penna et al and Rud et al [5,11] provide critical first steps towards much needed clarity in understanding how best to perform CT urography as well as insight and perspective on the role of the excretory phase in the detection of urothelial carcinoma. These important publications will undoubtedly lead to further global consensus as well as larger studies to elucidate the utility of the different CTU phases.…”

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confidence: 99%

Making sense of the CT Urogram

Shaish

2020

Eur Radiol

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Imaging protocols for CT urography: results of a consensus conference from the French Society of Genitourinary Imaging

Cited by 22 publications

References 33 publications

Split vs. Single Bolus CT Urography: Comparison of Scan Time, Image Quality and Radiation Dose

Split vs. Single Bolus CT Urography: Comparison of Scan Time, Image Quality and Radiation Dose

Study Progress of Noninvasive Imaging and Radiomics for Decoding the Phenotypes and Recurrence Risk of Bladder Cancer

Making sense of the CT Urogram

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