Which technique is utilized to ensure proper visualization of the fallopian tubes during imaging?

The technique used to ensure proper visualization of the fallopian tubes during imaging is contrast injection. This method is employed in procedures such as hysterosalpingography (HSG), where a radiopaque contrast medium is injected into the uterine cavity. This contrast allows for clear delineation of the fallopian tubes and the interior of the uterus on radiographic images. The presence of the contrast highlights any blockages, abnormalities, or structural issues, thus providing essential information for assessing female reproductive health.

In cases where imaging of the fallopian tubes is necessary, contrast injection is crucial because it enables high-contrast visualization that other modalities may not achieve. Techniques like digital subtraction angiography, MRI, or ultrasound guidance do not specifically target the visualization of the fallopian tubes as effectively as contrast injection does in this context.