There were at least 5 sets of X-Ray Machines being used on the Boer side of the war.
The unit at Jacobsdal was under the supervision and experience of Dr. H. Kuttner, who had first used X-Rays in the Greco-Turk War of 1897, following which he published a book on the subject.
On the British side there were at least 10 units in operation, including those on the hospital ships.
Dr. Hall Edwards was in charge of the unit at Deelfontein, and later at the Imperial Yeomanry Hospital in Pretoria. He lost his fingers from irradiation necrosis from exposure to the rays.
These extracts were taken from an article published in The South African Military History Society Journal. Vol . 6 No 3. June 1984.
If anyone is interested in reading the full article, which goes into more detail, it can be found on the web.