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. 2018 Sep;4(3):E85-E90.
doi: 10.1055/a-0647-1575. Epub 2018 Sep 24.

MRI-Ultrasound Fusion Imaging for Diagnosis of Deep Infiltrating Endometriosis - A Critical Appraisal

Judith Berger  1   2 , Onno Henneman  3 , Johann Rhemrev  4 , Maddy Smeets  4 , Frank Willem Jansen  2
Affiliations

MRI-Ultrasound Fusion Imaging for Diagnosis of Deep Infiltrating Endometriosis - A Critical Appraisal

Judith Berger et al. Ultrasound Int Open. 2018 Sep.

Abstract

Purpose: It was the aim of our study to evaluate this procedure using pelvic anatomical landmarks in order to assess the accuracy of fusion imaging and to critically evaluate the applicability in daily practice.

Methods: In a prospective, single center study, 10 patients with clinical signs of deep infiltrating endometriosis (DIE) were selected. We measured the distance between the landmark organ and the target shown by the software system (measurement 1). Measurement 2 depicts the distance between the landmark and the nearest calibration point. The calibration inaccuracy was measured as a third type of measurement (measurement 3).

Results: Measurement 1: the average distance between the organ landmark to the target was 13.6 mm (range: 0-96 mm). Measurement 2: in 31 of the 40 attempts (77.5 %), we could measure the distance from the landmark organ to the nearest calibration point. The average distance was 34.4 mm (range: 0-69 mm).Measurement 3: A perfect match was seen in 6 of 20 attempts (30.0 %). There was a deviation in 14 of the 20 attempts (70.0 %). The mean distance was 11.1 mm (range: 6-23 mm). Conclusion Although very promising, MRI-ultrasound fusion imaging (MUFI) currently cannot be readily implemented into daily practice as a routine evaluation of DIE.

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Conflict of interest statement

Conflict of Interest The authors declare no conflict of interest.

Figures

Fig. 1
Fig. 1
a Measurement 1: The circle was placed on the landmark organ on MRI (ovary, ellipse, left) and reappeared on the TVUS on the target organ (ovary, ellipse, right). This was a perfect match. b The small circle with X was put on the landmark organ (uretric orifice, asterix, left) and reappeared on the TVUS on another part of the bladder. The deviation was measured. The circle without X is the calibration point.
Fig. 2
Fig. 2
Measurement 2: The distance between the landmark organ (ovary, ellipse, left) and the nearest calibration point (uterus, small circle) was measured.
Fig. 3
Fig. 3
a Measurement 3: Calibration check with 2-point calibration. Circle with X (ovula Nabothi, cervix) big circle: posterior fornix. The right part of the picture (i. e., the TVUS image) has been zoomed in to focus on the landmarks. b Calibration check with 2 calibration points: circle with small circle inside: internal cervical ostium, circle with big circle inside: external cervical ostium, solitary circle: landmark organ (bowel)
See this image and copyright information in PMC

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