COLLIMATOR EFFICIENCY AND DESIGN. I. COLLIMATOR EFFICIENCY.
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Computers↗
Biomedical subjects
H E JOHNS
Publications and source records attributed to H E JOHNS.
AN EXAMINATION OF THE DEFINITION AND MAGNITUDE OF BACK-SCATTER FACTOR FOR COBALT 60 GAMMA RAYS.
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Cobalt↗
INACTIVATION AND PHOTOREACTIVATION OF THE T-EVEN PHAGES AS A FUNCTION OF THE INACTIVATING ULTRAVIOLET WAVELENGTH.
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Coliphages↗
THE ULTRAVIOLET PHOTOCHEMISTRY OF THYMIDYLYL-(3'-5')-THYMIDINE.
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Chemical Phenomena↗
A DOUBLE HEADED COBALT 60 TELETHERAPY UNIT.
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Cobalt↗
THE ULTRAVIOLET PHOTOCHEMISTRY OF DEOXYURIDYLYL (3' TO 5') DEOXYURIDINE.
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Chemical Phenomena↗
The absorbed dose in cylindrical cavities within irradiated bone.
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Bone Diseases↗
Whole body scanning in medicine.
Fundamental physical aspects of scanning the human body to determine in vivo radioisotope distribution are discussed, with special reference to the importance of collimator design and data display system. The pertinent details of a sensitive whole body scanner which has proved useful in clinical practice are described. The main features contributing to its versatility are: (1) fully automatic operation, (2) use of a 5'' diameter detector crystal with a focusing collimator, (3) provision to scale the scintiscan presentation to a convenient size, and (4) photographic recording of the scan.
Humans↗
Comparative study of some properties of bacteriophage T4D irradiated with monochromatic ultraviolet light.
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Bacteriophages↗
Photochemistry of thymine dimers.
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Photochemistry↗
The measurement of build-up on curved surfaces exposed to Co60 and Cs137 beams.
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Cesium↗
Comparison of Monte Carlo calculations and experimental measurements of scattered radiation produced in a water phantom by primary radiations with half-value layers from 1.25 mm Cu to 11 mm Pb.
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Copper↗
Depth-dose data for rectangular fields.
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Humans↗
The dual-purpose cesium unit for radiotherapy.
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Cesium↗
Measurement of absorbed dose with calorimeter and determination of W.
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Calorimetry↗
Spent radon seeds: II. Radiation from spent radon seeds.
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Humans↗
An automatic dose computer for radiotherapy equipment.
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Humans↗
A caesium 137 teletherapy unit for use at a source-to-skin distance of 35 cm.
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Cesium↗