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Volume 20, Issue 11
Displaying 1-14 of 14 articles from this issue
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Response Functions of Ionization Chamber and Radiation SourceTakami KOYANAGI, Kazuo AIDA1971 Volume 20 Issue 11 Pages 573-578
Published: November 15, 1971
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSOverall response function of the thickness gauging system composed of a radiation source and a ionization chamber is calculated theoretically on the simple principle known as “the rectilinear propagation of light”. This function can be calculated from the response functions of each element of the system. In this system the source is of some extent, and the object is interposed between the source and the chamber, casting a blurred shadow on the chamber greater than itself.
The response function of ionization chamber or radiation source is experimentally obtained from the Fourier-transform of the differential of the transient response measured by scanning a shelter plate close to the surface of the subject.
The response functions of cylindrical and spherical chambers with circular, square and rohmbic windows and a radiation source (90Sr) are obtained theoretically and experimentally. These two results are in good agreement.
As to the overall response function, the theoretical values disagree with the experimental values. This must be caused by the effects of scattered β-rays.
The amount and the response function of the scattered rays are remained unknown and left as the next problem to be studied.View full abstractDownload PDF (608K) -
1971 Volume 20 Issue 11 Pages 577
Published: 1971
Released on J-STAGE: July 21, 2010
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Takeshi TOMINAGA, Masao ISHII, Nobufusa SAITO1971 Volume 20 Issue 11 Pages 579-581
Published: November 15, 1971
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSEight cobaltammine bromides, [Co (NH3) 5X] Br2, 3 (X=NH3, H2O, halogens, etc.) were irradiated with thermal neutrons at dry ice temperature in a TRIGA reactor. The chemical distribution of 82Br atoms arising from 81Br (n, γ) 82Br and 81Br (n, γ) 82mBr (IT) 82Br transformations was determined by means of ion exchange method. Since the 82Br ligand yields (the percentages of total produced 82Br complexed with cobalt) obtained experimentally were the overall yields from the composite effects of the above transformations, the 82Br ligand yields from 82mBr (IT) 82Br recoil reactions alone were estimated by making adequate assumptions. The estimated 82Br ligand yields from 82mBr (IT) 82Br reaction were found to vary with the kind of ligand, X, in the target complexes. The correlation appears to be similar to that observed with 80mBr (IT) 80Br reaction.View full abstractDownload PDF (303K) -
Naoya IWASAKI, Shigeru SHIBATA, Yoichi KASAI, Yoshiro MITO1971 Volume 20 Issue 11 Pages 582-587
Published: November 15, 1971
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSTo get an available liver scintigram in diagnosis, we endeavored to select a nuclide for use (a radioparmaceutical) and to improve a scanner as well as the scanning technique itself.
This time, we made the examination on liver scintigrams of 100 cases using 113mIn-colloid, and obtained the following results. Seventy to ninty per cent of 113mIn-colloid is accumulated in liver and the remainder is distributed in spleen, bone-marrow and so on. The short half-life of 113mIn (1.73 h) makes it possible to perform the mass dosage, thereby reducing the required time for scanning.
Furthermore, the scintigram thus obtained is fine enough.
Reciprocal comparison of the detective ability among the results obtained by the use of 99mTc-colloid, 198Au-colloid and by the use of 113mIn-colloid was made also. From above data, it was proved that against 99mTc-colloid is available for the detection of a shallow space occupying lesion, 198Au-colloid is useful for the detection of a deep space occupying lesion. 99mTc-colloid showed both of those two merits. lii addition, as well as in the case of 99mTc-colloid, we can easily obtain the spleen figure using 113mIn-colloid.
Neither any pyrexia nor histaminia as a side effect was observed in 104 cases under the experiments with 113mIn-colloid.View full abstractDownload PDF (6106K) -
Akira OGISO, Rie YOSHIDA, Kazuo UMENO, Toshiharu AKUTSU, Kozo MATSUMOT ...1971 Volume 20 Issue 11 Pages 588-596
Published: November 15, 1971
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESS99mTc and 113mIn are much harmless to the patients than the other radioisotopes, such as 198Au, 131I, 203Hg, etc., since their half lives are shorter. So that they can be given in much more doses and used broadly in scanning the brain, lung, liver, spleen, kidney, placenta, bone marrow, cardiac pool, etc. 113mIn is produced from 113Sn-113mIn generator by milking and due to its short half life, the generator can be eluted several times a day, and can be used for a long time, even more than 6 months, because the half life of 113Sn is 118 days long.
The simplified preparation of reliable scanning agents is made possible by use of a closed generator system and pre-sterilized vials containing the appropriate chemicals to make the specific radio pharmaceuticals.
Liver scanning with 113mIn (OH) 3-colloids was tried on 41 cases, such as hepatitis, cirrhosis, tumors, etc.
In this way diagnostically available images were obtained in all cases.
The liver uptake of injected 113mIn (OH) 3-colloids intravenously was 85% on an average in normal cases, and liver radiation dose from 2 mCi 113mIn (OH) 3-colloids was about 0.85 rads.
Contamination of 113Sn in 113mIn was identified with hematoxylin method, and it was less than 0.003% in concentration.
Therefore 113mIn is very available isotope for liver scanning. (Received July 10, 1971)View full abstractDownload PDF (7401K) -
Katsushi WATANABE, Masataka INAKURA, Kenjiro KAWAHIRA, Chikashi NAKAYA ...1971 Volume 20 Issue 11 Pages 597-602
Published: November 15, 1971
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSWe reported the results of brain scintigraphy in 48 cases using 113mIn-DTPA kit that can be prepared at only one step operation.
In 48 cases, brain tumors was confirmed in 19 cases, non-tumorous intracranial diseases was 7 cases, normal and unconfirmed was 22 cases.
The ratio of detection was seemed not to differ fromer reports.
As the side effect cannot be recognized at any case and the complicated operation of fromer 113mIn-DTPA preparation is not needed, this kit is a very convenience preparation method in routine test.View full abstractDownload PDF (4284K) -
Shigeo KOBAYASHI, Kikuo YATABE1971 Volume 20 Issue 11 Pages 603-606
Published: November 15, 1971
Released on J-STAGE: July 21, 2010
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Kenzo TAGUCHI, Taiji SCHIMIZU1971 Volume 20 Issue 11 Pages 607-609
Published: November 15, 1971
Released on J-STAGE: July 21, 2010
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Osamu YURA1971 Volume 20 Issue 11 Pages 610-611
Published: November 15, 1971
Released on J-STAGE: July 21, 2010
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Vincent P. GUINN1971 Volume 20 Issue 11 Pages 612-619
Published: November 15, 1971
Released on J-STAGE: July 21, 2010
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Minoru OKADA1971 Volume 20 Issue 11 Pages 620-630
Published: November 15, 1971
Released on J-STAGE: July 21, 2010
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—Report on Sprout Inhibition of Potatoes by Gamma Irradiation—Tomotaro SATO1971 Volume 20 Issue 11 Pages 631-637
Published: November 15, 1971
Released on J-STAGE: July 21, 2010
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Some Notes on Counting ProceduresHidero UEYANAGI1971 Volume 20 Issue 11 Pages 638-647
Published: November 15, 1971
Released on J-STAGE: July 21, 2010
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1971 Volume 20 Issue 11 Pages A1195-A748
Published: November 15, 1971
Released on J-STAGE: July 21, 2010
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