Biomaterial Database

X-ray photographic method for determination of stable iodine in tissues. 1977

P Puumalainen, and P Suominen

A new x-ray photographic technique for imaging of small concentrations of iodine in tissues is presented. The method is based on the use of two x-ray beams of slightly different energies, which are obtained from the same primary source by appropriate use of critical absorbers. The beam energies are chosen so that the more energetic one is high enough to excite K x rays of the element under study while the less energetic beam is just below the required excitation energy. Two x-ray pictures are taken using the beams consecutively; thereafter, a difference picture is made by subtracting photographically the lower energy beam picture from that of higher energy. The difference picture then displays the distribution of the element to be imaged. This method is sensitive to iodine concentrations less than 100 microgram/mm2.

UI	MeSH Term	Description	Entries
D007455	Iodine	A nonmetallic element of the halogen group that is represented by the atomic symbol I, atomic number 53, and atomic weight of 126.90. It is a nutritionally essential element, especially important in thyroid hormone synthesis. In solution, it has anti-infective properties and is used topically.	Iodine-127,Iodine 127
D010781	Photography	Method of making images on a sensitized surface by exposure to light or other radiant energy.	Photographies
D013382	Subtraction Technique	Combination or superimposition of two images for demonstrating differences between them (e.g., radiograph with contrast vs. one without, radionuclide images using different radionuclides, radiograph vs. radionuclide image) and in the preparation of audiovisual materials (e.g., offsetting identical images, coloring of vessels in angiograms).	Subtraction Technic,Subtraction Technics,Subtraction Techniques,Technic, Subtraction,Technics, Subtraction,Technique, Subtraction,Techniques, Subtraction
D014965	X-Rays	Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source.	Grenz Ray,Grenz Rays,Roentgen Ray,Roentgen Rays,X Ray,X-Ray,Xray,Radiation, X,X-Radiation,Xrays,Ray, Grenz,Ray, Roentgen,Ray, X,Rays, Grenz,Rays, Roentgen,Rays, X,X Radiation,X Rays,X-Radiations