Placental volume in gestational week 27 measured by three‐dimensional ultrasound and magnetic resonance imaging

• DOI: 10.1111/aogs.14115
• Publication Date: 2021-02-08T18:30:50Z
• Authors: Karianne Sagberg; Anne Eskild; Silje Sommerfelt; Kjell I. Gjesdal; Lucy E. Higgins; Arne Borthne; Vigdis Hillestad
• Keywords: 3D ultrasound; Interquartile range

Abstract Introduction Ultrasound is the diagnostic tool of choice in pregnancy. We lack valid ultrasound methods for placental size measurements. Our aim was therefore to compare three‐dimensional (3D) with magnetic resonance imaging (MRI) measurements volume. Material and measured volume by 3D MRI 100 unselected pregnancies at 27 weeks gestation (25 +4 –28 weeks). The acquisitions were analyzed offline, outline manually traced using virtual organ computer‐aided analysis (VOCAL) 30° rotational technique. examinations included a T2‐weighted gradient echo sequence sagittal plane, 5‐mm slices through entire uterus. each slice. correlation between volumes estimated intraclass coefficients. Bland‐Altman applied visualize systematic bias limits agreement, which ratio volume/3D plotted against average two methods. Results coefficient 0.49 (95% confidence interval 0.33‐0.63). In general, smaller (median 373 cm 3 , interquartile range 309‐434 ) than 507 429‐595 1.44. 95% agreement wide (0.68‐2.21). Conclusions found poor moderate Generally, MRI, suggesting that failed placenta. findings may hopefully contribute improvement