Evaluation of Image Quality in Obstetrical Ultrasonography: Comparison Between Subjective Assessment and Contrast-to-noise Ratio

Ultrasonography Clinical Trial

Official title:

ECHOQUALITY: Evaluation of Image Quality in Obstetrical Ultrasonography: Comparison Between Subjective Assessment and Contrast-to-noise Ratio

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT06265974
• Other study ID #: ECHOQUALITY
• Status: Completed
• Start date: August 1, 2023
• Est. completion date: January 31, 2024

Study information

• Verified date: February 2024
• Source: Poitiers University Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

The goal of this observational study is to determine whether the subjective assessment of the quality of obstetrical ultrasonography pictures can be similar to that of an objective tool. The main question it aims to answer is: Is the subjective assessment of the quality of obstetrical ultrasonography pictures by a young practitioner and an experienced one can be similar to that of an objective tool, such as the contrast-to-noise ratio (CNR)? The contrast-to-noise ratio is commonly used in radiology to evaluate image quality by assessing the ability to distinguish differences between two elements. The investigators selected a retrospective cohort of 198 patients, including three pictures per fetus screened between 18 and 18 weeks and 6 days. For each picture, the investigators assessed the quality of two different elements and the entire image, and then calculated the CNR using software. The investigators will compare the three assessment between them

Recruitment information / eligibility

• Status: Completed
• Enrollment: 198
• Est. completion date: January 31, 2024
• Est. primary completion date: January 1, 2024
• Gender: Female
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Patient who underwent ultrasound between 18 weeks and 18 weeks + 6 days for prenatal diagnosis
• Ultrasound performed by the same practitioner
• Ultrasound performed on the same ultrasound machine "Voluson E10", with the "RM6C" probe

Exclusion Criteria:

• Patient's refusal
• Use of another ultrasound device other than the "Voluson E10", and/or an ultrasound probe other than the "RM6C"
• Intrauterine fetal deaths

Related Conditions & MeSH terms

• Obstetrics
• Ultrasonography

Locations

Country	Name	City	State
France	University Hospital La MILETRIE	Poitiers

Sponsors (1)

Lead Sponsor	Collaborator
Poitiers University Hospital

Country where clinical trial is conducted

France, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	The comparability between a subjective and objective assessment of the contrast to noise ratio of an obstetric ultrasound image	Both an experienced operator (a Ph.D. doctor) and a novice operator (a residency student) subjectively evaluated the contrast and noise of each region of interest previously chosen. Contrast was scored on a scale of 1 to 3, with 1 indicating low contrast, 2 for medium, and 3 for high contrast. Noise was scored on the same scale, with 1 corresponding to low noise, 2 for medium, and 3 for high noise. The subjective contrast to noise ratio (CNR) was determined by the ratio between these two scores.; To assess the objective CNR, computer-assisted image analysis was performed using MATLAB software.	baseline