Universität zu Köln

Zopfs, David, Graffe, Josefine, Reimer, Robert Peter, Schaefer, Sebastian, Persigehl, Thorsten, Maintz, David, Borggrefe, Jan ORCID: 0000-0003-2908-7560, Haneder, Stefan, Lennartz, Simon and Grosse Hokamp, Nils . Quantitative distribution of iodinated contrast media in body computed tomography: data from a large reference cohort. Eur. Radiol.. NEW YORK: SPRINGER. ISSN 1432-1084

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Abstract

Objectives Dual-energy computed tomography allows for an accurate and reliable quantification of iodine. However, data on physiological distribution of iodine concentration (IC) is still sparse. This study aims to establish guidance for IC in abdominal organs and important anatomical landmarks using a large cohort of individuals without radiological tumor burden. Methods Five hundred seventy-one oncologic, portal venous phase dual-layer spectral detector CT studies of the chest and abdomen without tumor burden at time point of imaging confirmed by > 3-month follow-up were included. ROI were placed in parenchymatous organs (n= 25), lymph nodes (n= 6), and vessels (n= 3) with a minimum of two measurements per landmark. ROI were placed on conventional images and pasted to iodine maps to retrieve absolute IC. Normalization to the abdominal aorta was conducted to obtain iodine perfusion ratios. Bivariate regression analysis,ttests, and ANOVA with Tukey-Kramer post hoc test were used for statistical analysis. Results Absolute IC showed a broad scatter and varied with body mass index, between different age groups and between the sexes in parenchymatous organs, lymph nodes, and vessels (range 0.0 +/- 0.0 mg/ml-6.6 +/- 1.3 mg/ml). Unlike absolute IC, iodine perfusion ratios did not show dependency on body mass index; however, significant differences between the sexes and age groups persisted, showing a tendency towards decreased perfusion ratios in elderly patients (e.g., liver 18-44 years/>= 64 years: 0.50 +/- 0.11/0.43 +/- 0.10,p <= 0.05). Conclusions Distribution of IC obtained from a large-scale cohort is provided. As significant differences between sexes and age groups were found, this should be taken into account when obtaining quantitative iodine concentrations and applying iodine thresholds.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zopfs, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Graffe, Josefine UNSPECIFIED UNSPECIFIED UNSPECIFIED Reimer, Robert Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED Schaefer, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED Persigehl, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Maintz, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Borggrefe, Jan UNSPECIFIED orcid.org/0000-0003-2908-7560 UNSPECIFIED Haneder, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED Lennartz, Simon UNSPECIFIED UNSPECIFIED UNSPECIFIED Grosse Hokamp, Nils UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-317908
DOI:	10.1007/s00330-020-07298-3
Journal or Publication Title:	Eur. Radiol.
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1432-1084
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DUAL-ENERGY CT; QUANTIFICATION; CARCINOMA; PERFUSION; ACCURACY; CRITERIA Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/31790