RU-2861526-C1 - METHOD FOR PERFORMING VIRTUAL HYSTEROSCOPY

RU2861526C1RU 2861526 C1RU2861526 C1RU 2861526C1RU-2861526-C1

Abstract

FIELD: medicine. SUBSTANCE: invention relates to obstetrics and gynaecology, and can be used for diagnosing diseases of the uterine cavity and assessing the condition of the endometrium, including before assisted reproductive technologies (ART). To do this, from the 8th to the 14th day of the menstrual cycle, an examination is performed in the following sequence: transvaginal scanning of the pelvic organs in B-mode with colour Doppler mapping and power Doppler is performed. Then, the transducer is positioned so that the uterus is in the mid-sagittal plane with simultaneous visualisation of the uterine body and cervix, and 3D mode with a gynaecological preset is turned on. The resulting image of the uterus is placed in a frame indicating the Region of Interest (ROI). The centre of the ROI is aligned with the midline of the endometrium and the cervical canal. A summary scan of the surface reconstruction of the uterus with the cavity is displayed on the monitor screen. The midline of the endometrium is aligned in the coronal and axial planes, with the uterine fundus placed at the top of the screen and the isthmus region at the bottom of the screen. The image is rotated to the sagittal-parasagittal plane, and visualisation is performed by moving from the right side wall of the uterus to the left, while aligning the axis of the uterine cavity vertically when scanning in the sagittal section and horizontally when scanning in the axial section. The scan in the axial section is positioned so that the isthmus is located closer to the examiner and the uterine fundus is farther from the examiner, with the midline of the endometrium always positioned horizontally during the examination. EFFECT: highly accurate non-invasive assessment of the uterine cavity and detection of various types of pathological formations of small sizes by using an optimal sequence of diagnostics in 3D mode, virtual navigation in three orthogonal planes (sagittal, coronal and axial), which, accordingly, reduces the risk of complications arising from interventions in the uterine cavity, and also allows repeated examination of the endometrial structure during one menstrual cycle, including before the use of protocols used in assisted reproductive technologies. 1 cl, 13 dwg, 2 ex

Inventors

Minashkina Elena Vladimirovna
Ozerskaya Irina Arkadievna
Ozhogina Ekaterina Viktorovna

Dates

Publication Date: 20260505
Application Date: 20251115

Claims (1)

A method for performing virtual hysteroscopy, including an ultrasound examination (US) with a gynecological preset in 3D mode using a transvaginal sensor, characterized in that the examination is carried out from the 8th to the 14th day of the menstrual cycle with a sensor with a frequency of 7.5-9.0 MHz, in the following sequence: scanning the pelvic organs in B-mode with color Doppler mapping and power Doppler, then the sensor is positioned so that the uterus is in the midsagittal plane with simultaneous visualization of the body and cervix, then the 3D mode is turned on, the resulting image of the uterus is placed in a frame designating the area of interest - Region of Interest (ROI), the center of the ROI is combined with the midline of the endometrium and cervical canal, a total scan of the surface reconstruction of the uterus with the cavity is displayed on the monitor screen, while the image of the uterus occupies 75% of the monitor screen, The midline of the endometrium is aligned in the coronal and axial planes, which corresponds to visualization during hysteroscopy - the fundus of the uterus is located at the top of the screen, the isthmus area is at the bottom of the screen, the image is rotated to the sagittal-parasagittal plane, visualization is carried out by moving from the right lateral wall of the uterus to the left, while aligning the axis of the uterine cavity vertically when scanning in the sagittal section and horizontally when scanning in the axial section, while the scan in the axial section is positioned in such a way that the isthmus is located closer to the researcher, and the fundus of the uterine cavity is further from the researcher, the midline of the endometrium is positioned horizontally during the study.

Description

Field of technology to which the invention relates The invention relates to the field of medicine, namely to obstetrics and gynecology, and can be used to diagnose diseases of the uterine cavity and assess the condition of the endometrium, including before carrying out assisted reproductive technologies (ART). State of the art Known methods for assessing the uterine cavity include transvaginal 2D and 3D ultrasound, magnetic resonance imaging, and invasive hysteroscopy. However, 2D methods do not provide sufficient visualization to detect small pathological changes, MRI is expensive and not always available, and hysteroscopy is an invasive procedure requiring anesthesia and hospitalization. The closest analogue is the virtual hysteroscopy method, which includes the use of Fly-Thru technology (Toshiba, Tokyo, Japan), which identifies various pathological formations in the uterine cavity and endometrial pathology, including in assisted reproductive technologies (JAN TESARIK at al. Virtual ultrasonographic hysteroscopy followed by conventional operative hysteroscopy, enabling pregnancy. September 2016. American Journal of Obstetrics and Gynecology 216 (2). DOI: 10.1016/j.ajog.2016.09.081 (https://www.researchgate.net/publication/308271784_Virtual_ultrasonographic_hysteros This method involves dilating the uterine cavity by injecting 10 ml of saline solution through a narrow, soft balloon catheter attached to the cervical canal. Immediately afterward, images of the cavity are taken. However, this technique is inherently invasive, as it requires intervention into the uterine cavity, which carries a risk of complications. Furthermore, the procedure requires the participation of an anesthesiologist and a specialized operating room. The technical problem solved by the invention is the development of a non-invasive method of virtual hysteroscopy, allowing for expanded viewing angles, as well as comprehensive virtual navigation and post-processing. Disclosure of the essence of the invention The technical result of the invention is to provide a highly accurate non-invasive assessment of the uterine cavity and the detection of various types of small pathological formations through the use of an optimal sequence of diagnostics in 3D mode, virtual navigation along three orthogonal planes (sagittal, coronal and axial), which, accordingly, reduces the risk of complications arising from interventions in the uterine cavity, and also allows for repeated examination of the structure of the endometrium throughout one menstrual cycle, including before the implementation of protocols used in assisted reproductive technologies. The technical result is achieved through the proposed method of performing virtual hysteroscopy, including ultrasound examination (US) with a gynecological preset in 3D mode using a transvaginal sensor. The study is carried out from the 8th to the 14th day of the menstrual cycle with a sensor with a frequency of 7.5–9.0 MHz, in the following sequence: scanning of the pelvic organs in B-mode with color Doppler mapping and power Doppler, then the sensor is positioned so that the uterus is in the midsagittal plane with simultaneous visualization of the body and cervix, then the 3D mode is turned on, the resulting image of the uterus is placed in a frame indicating the area of interest - Region of Interest (ROI), combine the center of the ROI with the midline of the endometrium and cervical canal, a total scan of the surface reconstruction of the uterus with the cavity is displayed on the monitor screen, while the image of the uterus occupies 75% of the monitor screen, align the midline of the endometrium in the coronal and axial planes, which corresponds to visualization during hysteroscopy - the fundus of the uterus is located at the top of the screen, the isthmus area is at the bottom of the screen, rotate the image to sagittal-parasagittal plane, visualization is performed by moving from the right lateral wall of the uterus to the left, while aligning the axis of the uterine cavity vertically when scanning in the sagittal section and horizontally when scanning in the axial section, while the scan in the axial section is positioned in such a way that the isthmus is located closer to the researcher, and the bottom of the uterine cavity is further from the researcher, the midline of the endometrium is positioned horizontally during the study. Brief description of the drawings The invention is explained with graphic materials: Fig. 1 – alignment of the ROI center with the midline of the endometrium and cervical canal (green dotted line), Fig. 2 – the location of the fundus of the uterus at the top of the screen, the isthmus area at the bottom of the screen, Fig.3 – visualization of the connection zone, Fig.4 – visualization when using the [HDlive] key, Fig. 5 – image of the uterus on the monitor screen in the sagittal - parasagittal planes, Fig.6-9 – movement from the isthmus to the bottom of the uterine cavity,