Revolution: Dr. Harold Johns demonstrates the high-energy radiation unit he developed. It took 60 minutes to treat patients with 200,000-volt machines(...)
Date6/27/1980
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Original Toronto Star caption: Revolution: Dr. Harold Johns demonstrates the high-energy radiation unit he developed. It took 60 minutes to treat patients with 200,000-volt machines, his Cobalt 60 - capable of 3 million volts in a 10-minute treatment - made the old machines obsolete overnight.
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ProvenanceFrom the Toronto Star Archives
CollectionToronto Star Photograph Archive
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Copyright HolderToronto Star (Firm)
Call Number / Accession NumberTSPA_0057791F
4/30/1984