Patents – Robert Hofstadter

Hofstadter Page · Resources with Additional Information


US 3,373,279 EUROPIUM ACTIVATED STRONTIUM IODIDE SCINTILLATORS – Hofstadter, R.; March 12, 1968
This invention comprises a scintillation crystal composed of strontium iodide activated by europium. The invention also comprises a radiation detector having a detecting element and a chamber optically coupled to this detecting element, having within the chamber a scintillator consisting of strontium iodide activated with about 10–16,000 parts per million of europium.

US 3,714,057 IODIDE ACTIVATED THALLIUM CHLORIDE SCINTILLATOR – Hofstadter, Robert; Kramer, Gerald R.; Farukhi, Mohammed R.; Rosette, King H.; January 30, 1973
A new high Z scintillator capable of generating light radiation upon exposure to nuclear radiation such as gamma rays, beta rays, protons, mesons, X-rays, etc. wherein said scintillator is transparent to said light radiation and consists of a major amount of thallium chloride and a minor amount of an iodide containing compound.

US 4,432,370 METHOD AND MEANS FOR MINIMALLY INVASIVE ANGIOGRAPHY USING MONO-CHROMATIZED SYNCHROTRON RADIATION; – Hughes, E. Barrie; Rubenstein, Edward; Hofstadter; Robert; February 21, 1984
Non-invasive angiography is provided through use of monochromatized synchrotron radiation in a dichromographic procedure. A small quantity of an iodinated compound is introduced into the blood stream of a patient. An X-ray picture of a blood vessel such as the coronary artery can be produced by directing synchrotron radiation from a storage ring source at first and second selected wavelengths or energy levels through the blood vessel, detecting the attenuated radiation to obtain first and second signals representative of the attenuated radiation, and logarithmically subtracting the two signals to essentially eliminate all background contrast. Due to the K-absorption edge of iodine the resulting signal will emphasize the blood vessel containing the iodine.


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