This looks like a description of the endoscopy protocol/progression.
"Endoscopy progression: Oesophagus, cardia, fundus, body of stomach, angular incisure, pyloric antrum, pylorus..."

Ogive likely refers to the inner shape of the pyloric antrum.

Low confidence because since medicine is anything but my speciality, I might be talking through my hat. Apart from that, I think there is a fair chance that ogive antrale is as familiar (unscientific) a term as 'antral funnel' seems to be, given that in one instance below it is in quotes.

The oxyntic mucosa gradually transitions into THE FUNNEL-SHAPED ANTRAL AREA of the distal (antral and pyloric) stomach.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6900998/

Gastric chyme is forced into the FUNNEL-SHAPED ANTRAL CHAMBER by peristalsis
https://basicmedicalkey.com/stomach-duodenum/

Most of the gastric contents that are pushed into the ANTRAL FUNNEL are propelled backward as the pylorus closes and pressure within the antral lumen rises
https://accessmedicine.mhmedical.com/content.aspx?bookid=120...

At gastroscopy Edwards and Rowlands (l968) found that ripples of contraction sometimes moved down the gastric wall to a well-defined ring where the large bag of the stomach joined the commencement of the "ANTRAL FUNNEL". The ring often contracted to a narrow bore, at times obliterating the lumen, and could be mistaken for the pylorus. The true pylorus was situated at the end of the FUNNEL. At times annular contraction waves with a frequency of 3 per minute moved long the "antrum" to the gastro-duodenal junction, propelling mucus. Sometimes the mucus would be retropelled from the FUNNEL in an oral direction. The findings were ascribed to intermittent and possibly haphazard activity of the stomach due to the conditions pertaining at gastroscopy, such as the distension of the stomach, the stress of the subject, and the administration of sedative drugs.
http://med.plig.org/14/index.html