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Volume 39, Issue 9
Displaying 1-8 of 8 articles from this issue
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Saemi HISANAGA, Tadaoki YAMASHITA, Isao KITAMURA, Tetsuo ITOH, Sohei K ...1990Volume 39Issue 9 Pages 381-385
Published: September 15, 1990
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSBeO (Na) TLD on the market, UD-170 L, gives thermoluminescence response equivalent to irradiation with 3.2±0.5 cGy of 60Co γ-rays after irradiation with 1010 thermal neutrons per cm2. Because of this neutron sensitivity, UD-170 L is not suitable for measurement of γ-rays in γ-neutron mixed radiation from a nuclear reactor of Kinki University when we use it for radiobiological research. To reduce this troublesome sensitivity, we replaced the glass capillary used for UD-170 L with a quartz capillary. Quartz tube encapsulated BeO (Na) showed a markedly reduced response to thermal neutrons.View full abstractDownload PDF (597K) -
Kotaro YASUI, Yoshihiro KOHNO, Shiro AKAKI, Mari HASEGAWA, Tomio NAKAG ...1990Volume 39Issue 9 Pages 386-392
Published: September 15, 1990
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSTechnetium-99m macroaggregated albumin lung perfusion scintigraphy was performed and evaluated semiquantatively by Bull's eye analysis in 24, including 7 with central pulmonary carcinoma, 3 with hypersensitivity pneumonitis (HP), 3 with diffuse panbronchiolitis (DPB) and 11 normal subjects.
First, whole lung field was divided into three regions by three concentric circles. And then radial axes were projected from the center to define 36 sectors, 10 degree each. The counts of each sector was calculated and Bull's eye image and circumferential profile curve were displayed. The patient's map was compared with the lower limit of normal (mean—2 SD), and the extent score (ES) and the severity score (SS) were calculated. The ES was 0.25±0.12 in pulmonary carcinoma (n=7), 0.08±0.07 in HP (n=3), 0.06±0.04 in DPB (n=3) . The SS was 26.39±15.17 in pulmonary carcinoma, 4.75±5.57 in HP, 4.29±3.67 in DPB.
In one case of central pulmonary carcinoma, segmental perfusion defect was evaluated semiquantitatively by Bull's eye image and circumf erential profile curve. And in one case of HP, the change of regional pulmonary blood flow could be followed easily using extent and severity map.
This new application of Bull's eye analysis to lung perfusion scintigraphy migth be useful to evaluate regional pulmonary blood flow.View full abstractDownload PDF (7683K) -
—Comparison with Radioimmunoassay—Shumpei OHNAMI, Hajime NAKATA, Sumiya ETO1990Volume 39Issue 9 Pages 393-395
Published: September 15, 1990
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSProlactin (PRL) concentrations in sera and tumors of patients with various pituitary tumors were measured by both immunoradiometric assay (IRMA) and radioimmunoassay (RIA) . PRL concentrations in sera and tumor tissues measured by IRMA were well correlated with those measured by RIA. PRL concentrations in sera reflected those of tumors removed. This IRMA is a simple and useful method for PRL determination in serum and tissue.View full abstractDownload PDF (286K) -
Makoto YOSHIDA, Michio YOSHIZAWA, Kentaro MINAMI1990Volume 39Issue 9 Pages 396-399
Published: September 15, 1990
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSThe efficiencies of contamination source, defined in ISO Report 7506-1, were experimentally determined for such materials as flooring, polyethylene, smear-tested filter paper and stainless steel plate. 5 nuclides of 147Pm, 60Co, 137Cs, 204Tl and 90Sr-Y were used to study β-ray energy dependence of the efficiency, and 241Am as α-ray emitter. The charge-up effect in the measurement by a window-less 2π-proportional counter was evaluated to obtain reliable surface emission rate.
The measured efficiencies for non-permeable materials, except for two cases, are more than 0.5 even for 147Pm. The ISO recommendations were shown to be conservative enough on the basis of present results.View full abstractDownload PDF (512K) -
—Spectra and counting efficiencies for 15 different radionuclides—Kenichi IJIRI, Masashi ENDO, Susumu OSAKI, Norio NOGAWA, Shoko TSUDA, ...1990Volume 39Issue 9 Pages 400-403
Published: September 15, 1990
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESS“Ready Cap”, a small plastic container coated with solid scintillator has recently been introduced (Beckman Instruments, Inc.) . Pulse height spectra and counting efficiencies obtained with a liquid scintillator and Ready Cap using a liquid scintillation counter were compared for 15 different radionuclides. For radionuclides emitting low-energy β-rays or characteristic X-rays, the spectra for Ready Cap shifted toward the higher energy side compared with the spectra for the liquid scintillator. This tendency was reversed for the nuclides emitting higher-energy β-radiations (36Cl and 32P) . Generally, counting efficiencies both in Ready Cap and in liquid scintillator increased with increase in the energy of β-or X-rays. For some nuclides, Ready Cap gave higher counting efficiencies and for others it gave lower values than in the liquid scintillator. However, the differences were not large within each nuclide.
The use of Ready Cap is recommended for measurements of radionuclides when liquid scintillation cocktails have no means of waste disposal under the present Japanese radioisotope regulation.View full abstractDownload PDF (531K) -
Tsutomu ICHIMIYA1990Volume 39Issue 9 Pages 404-419
Published: September 15, 1990
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (1457K) -
(2) Analyses of gamma-ray spectrum dataTakashi SUZUKI1990Volume 39Issue 9 Pages 420-429
Published: September 15, 1990
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (935K) -
1990Volume 39Issue 9 Pages A49P-A94M
Published: September 15, 1990
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (3118K)
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