Illustration of extended CT number scales
Standard CT reconstruction data is stored using 12-bit unsigned integers (i.e. having possible values of 0 to 4095). These unsigned values are rescaled to a range encompassing -1024 through 3071 (using an offset, or intercept of -1024). However CT data can also…
Historical Gammasonics advertisements
The following advertisements were taken from personal scans of Australasian Physical and Engineering Sciences in Medicine issues published in 1989 and 1990. Gammasonics provided (and continues to provide) equipment for medical physics departments.
CT Density Tables
The use of CT data within a planning system necessitates a conversion from the Hounsfield scale, with units (HU) describing the radiodensity of the imaged tissue (compared to water, for X-ray energies), into density values, which the planning system can…
The Rontgen Rays
Taken from the Queanbeyan Age, published 5th September 1896. Source here. Day after day brings new evidence of the utility of the Rontgen X-rays in surgery. This week, the Rev. D. Laseron, of Lithgow, paid a visit to St. Stanislaut College, Bathurst,…