Myelograms Ms. Walley To ask the Secretary of State for Health what equipment currently available under the NHS is capable of determining whether or not myodil dye was used in the past; what is the location of each scanner: and what is its current availability for use. Mr. Dorrell [holding answer 14 January 1991]: If myodil dye was used in the past for a myelograrn its clearance from the body will vary from patient to patient. Normal radiographic X-ray equipment should detect any myodil still present in a patient's body.