Tamitha Grey let son perform X-ray at Withybush Hospital
A hospital radiographer let her 10-year-old son start an X-ray machine on a schoolgirl patient, a disciplinary tribunal has heard.
Tamitha Grey's son allegedly asked her: "Are we ready yet?" before the procedure at Withybush Hospital in Haverfordwest.
She has already had a formal written warning over the incident last May.
But she referred herself to the Health Care Professions Council (HCPC) and could be struck off.
The panel, sitting in Cardiff, heard from Nicola Jones, the mother of the 15-year-old patient who had the X-ray for a suspected broken wrist.
"It was an incredible thing to see. I still can't believe it happened," said Mrs Jones who works as an ultrasound technician at the same hospital.
"It was an extremely emotional moment. After I got home I just could not stop thinking about it. It was ingrained in my mind.
"At the time I would have felt uncomfortable that he was there, but my priorities were my own daughter."
The boy was removed before Mrs Grey, 46, performed a second X-ray on the girl.
She accepted the HCPC's claims she permitted an unqualified and unauthorised person to initiate the exposure of a patient to ionising radiation in May last year.
She also admitted permitting a member of the public to be present during a clinical examination, and that both allegations constituted misconduct.
But she denied that her fitness to practise as a radiographer was impaired by her actions.
Sophie Lister, on behalf of the HCPC, said Mrs Grey's son had been in the X-ray department of the hospital from about 16:00 GMT after an after-school rugby match had been cancelled.
The hearing was told children were allowed to stay in the staff room while parents worked if they had problems with child care.
The panel heard from other witnesses who said the mood at the time was relaxed and that consent was assumed unless parents objected when accompanying minors into exams.
They were also told Mrs Grey's son had been brought to the clinical area by a line manager.
She was given a final written warning by Hywel Dda Local Health Board after an earlier internal investigation and then referred herself to the HCPC.
During the three-day hearing, the HCPC will decide whether further punishment is needed.