Early time-related course of image findings in postmortem MRI: Typical findings and observer agreement in a porcine model
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Early time-related course of image findings in postmortem MRI: Typical findings and observer agreement in a porcine model. / Henes, Frank Oliver; Regier, Marc; Bannas, Peter; Henker, Marlen; Heinemann, Axel; Sperhake, Jan; Begemann, Philipp G C; Adam, Gerhard; Groth, Michael.
in: LEGAL MED-TOKYO, Jahrgang 28, 09.2017, S. 15-21.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Early time-related course of image findings in postmortem MRI: Typical findings and observer agreement in a porcine model
AU - Henes, Frank Oliver
AU - Regier, Marc
AU - Bannas, Peter
AU - Henker, Marlen
AU - Heinemann, Axel
AU - Sperhake, Jan
AU - Begemann, Philipp G C
AU - Adam, Gerhard
AU - Groth, Michael
N1 - Copyright © 2017 Elsevier B.V. All rights reserved.
PY - 2017/9
Y1 - 2017/9
N2 - PURPOSE: To assess early time-related image findings in postmortem magnetic resonance imaging (MRI) and to evaluate observer agreement in a porcine model.MATERIAL AND METHODS: Three pigs were examined by MRI at 15 different time points in the first 36h after death. Two observers independently recorded the postmortem interval (PMI) to the appearance of fluid collection (pleural space, interlobar and interlobular pulmonary fissures and hepatic interlobar fissures), gas accumulation (intrahepatic and intracardial) and blood clotting (aorta and intrahepatic venous vessels). Cohen's Kappa statistics and intraclass correlation coefficient (ICC) were used to evaluate intra- and interobserver agreement.RESULTS: Intrahepatic gas was evident after 12, 17 and 30h. Also, intracardiac gas was present in all animals. However, no chronological appearance has been observed. Blood clotting in the hepatic vein was observed within 3min, aortic clotting with a delay of 2-12h after death. Interlobular pulmonary fluid (median PMI: 2h, range 2-2h), pleural effusion (median PMI: 10.5h, range 9-12h) and hepatic interlobar fissure fluid (median PMI: 11.5h, range 11-12h) displayed a chronological appearance pattern. Qualitative and quantitative detection of most postmortem findings showed excellent intra- and interobserver agreement with Kappa values>0.8 or ICC>0.75.CONCLUSION: Pulmonary and hepatic fissural fluid collection as well as intravasal gas accumulation are early time-related image findings in postmortem MRI. The chronological appearance of these findings can be assessed with excellent observer agreement in a porcine model.
AB - PURPOSE: To assess early time-related image findings in postmortem magnetic resonance imaging (MRI) and to evaluate observer agreement in a porcine model.MATERIAL AND METHODS: Three pigs were examined by MRI at 15 different time points in the first 36h after death. Two observers independently recorded the postmortem interval (PMI) to the appearance of fluid collection (pleural space, interlobar and interlobular pulmonary fissures and hepatic interlobar fissures), gas accumulation (intrahepatic and intracardial) and blood clotting (aorta and intrahepatic venous vessels). Cohen's Kappa statistics and intraclass correlation coefficient (ICC) were used to evaluate intra- and interobserver agreement.RESULTS: Intrahepatic gas was evident after 12, 17 and 30h. Also, intracardiac gas was present in all animals. However, no chronological appearance has been observed. Blood clotting in the hepatic vein was observed within 3min, aortic clotting with a delay of 2-12h after death. Interlobular pulmonary fluid (median PMI: 2h, range 2-2h), pleural effusion (median PMI: 10.5h, range 9-12h) and hepatic interlobar fissure fluid (median PMI: 11.5h, range 11-12h) displayed a chronological appearance pattern. Qualitative and quantitative detection of most postmortem findings showed excellent intra- and interobserver agreement with Kappa values>0.8 or ICC>0.75.CONCLUSION: Pulmonary and hepatic fissural fluid collection as well as intravasal gas accumulation are early time-related image findings in postmortem MRI. The chronological appearance of these findings can be assessed with excellent observer agreement in a porcine model.
KW - Journal Article
U2 - 10.1016/j.legalmed.2017.07.005
DO - 10.1016/j.legalmed.2017.07.005
M3 - SCORING: Journal article
C2 - 28738216
VL - 28
SP - 15
EP - 21
JO - LEGAL MED-TOKYO
JF - LEGAL MED-TOKYO
SN - 1344-6223
ER -