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Volume 26, Issue 6
Displaying 1-18 of 18 articles from this issue
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—Discussion on the Results of Observation and Presentation of the Problems Involved in the Methods of Sampling and Analysis—Yatsuka MATSUDA, Tetsuo MAMURO1977Volume 26Issue 6 Pages 365-370
Published: June 15, 1977
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSFollowing the previous article, the results of observation are discussed in relation to meteorological conditions. The frequency distribution of gaseous sulfur concentrations (1 hr mean values) was bimodal as the result of the alternation of land and sea winds. The frequency distribution of particulate sulfur concentrations was also bimodal, but this can be rather ascribed to the variation of weather. The correlation between the concentrations of gaseous and particulate sulfur was not so great as was expected. Autocorrelations of the concentrations of gaseous and particulate sulfur were respectively investigated, and it was found that the variation of gaseous sulfur concentration showed daily cycle, and, against this, the variation of particulate sulfur concentration did not show appreciable daily cycle, but had weather correlation. Some discussions are presented concerning the selection of sampling points suitable for clarifying the behavior of sulfur in the atmosphere as well as the improvement of the methods of sampling and analysis.View full abstractDownload PDF (587K) -
Noriharu FUJIMURA1977Volume 26Issue 6 Pages 371-375
Published: June 15, 1977
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSRecently, the scintigram with 99mTc-labeled compounds has been routine procedure, because of it's ideal physical characteristics. The short physical half life of six hours, the absence of beta emission, and the gamma rays of 140 keV permit the administration of large amount of radioactivity.
For scintigram of deep or large organ, the absorption of 99mTcγ-rays by bone and soft tissue should not be negligible. For example, bone scintigram with 99mTc-phospho-rous compounds shows different pictures depending upon the anterior and the posterior views, because of it's rather lower energy.
Therefore, the linear attenuation coefficient and the half value layer of bone and soft tissue were measured with 99mTc γ-rays and others (197Hg, 203Hg, 131I, 198Au, 85Sr) .
Results:
1) The linear attenuation coefficient of 99mTcγ-rays was : bone -0.240 cm-1, acrylite -0.173 cm-1, Mix D -0.155 cm-1.
2) The half value layer of 99mTcγ-rays was: bone -2.89 cm, acrylite -3.98 cm, Mix D -4.47 cm.
It was concluded that the lower photon energy of 99mTc was influenced by bone and soft tissue, but it appeared to be most suitable for the present imaging devices. Therefore, pictures of multiple views are necessary in case of the scintigram with 99mTc-la-beled compounds.View full abstractDownload PDF (2493K) -
—Evaluation of the Myocardial Scintigraphy on Stress Exercise—Yoshiharu YONEKURA, Yasushi ISHII, Kazunori KADOTA, Hirofumi KAMBARA, ...1977Volume 26Issue 6 Pages 376-381
Published: June 15, 1977
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSA newly introduced radionuclide for myocardial imaging, 201T1, was studied for diagnosis of ischemic heart disease (IHD) . Five normals and 30 patients consisting of 18 with old myocardial infarction, 3 with acute myocardial infarction, and 9 with angina pectoris who had no history of myocardial infarction were selected for this study. Two mCi 201T1 as thallous chloride in saline solution were injected from antecubital vein as a bolous, and its rapid transport phase during initial three minutes were recorded by scintillation camera and stored into VTR to be analyzed further. Five normals and 11 patients with IHD were reexamined two weeks later with exercise loading by bycicle ergometer.
Fractional myocardial blood flow to cardiac output (MBF/CO) was calculated by indicator fractionation principle using the recording of the rapid transport phase.
An infarcted area of the myocardium in myocardial infarction was compatible with electrocardiographic findings, and in all cases with angina pectoris, resting myocardial scintigrams show no abnormal findings. Defects of ischemic area became clearly visualized with exercise loading in 3 cases of 11 IHD. MBF/CO was significantly increased (p<0.001) in normal controls with exercise loading, whereas not increased in IHD.
While the stress 201Tl myocardial scintigraphy has become accepted to be more sensitive than the stress electrocardiography, present data substantiated clearly that quantification of the myocardial blood flow was appeared to be superior adjunct to the simple stress scintigraphy.View full abstractDownload PDF (3494K) -
Yasuhiko ITO, Akira MURANAKA, Masatsugu OTSUKA, Masahiro UCHIDA, Yasum ...1977Volume 26Issue 6 Pages 382-388
Published: June 15, 1977
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSThe deposition of 99mTc-methylene diphosphonate (MDP) in the bone compared with that of 99mTc-EHDP was studied from basic and clinical aspects. Yields and stability of the labels were studied by paperchromatography and thin-layer chromatography. Rabbits experiments included the scintimetry of the bone, kidney, and soft tissue by setting ROI five to 60 minutes after administering labels, scintigraphy for two and three hours after the administration of labels, and distribution studies three hours after administration.
In the clinical study the ratios of blood radioactivity 2 hours after administration to that 10 minutes later in the cases of malignant and benign bone diseases were estimated, and the observations were made of the scintigraphy two hours after the administration of labels. Also, the scintimetry was done of pathological bones, normal bone, kidney and soft tissue region.
The labeling yield and stability of MDP have been found to be about the same as with EHDP, proving it to be quite satisfactory. A large fraction of the activity of MDP and EHDP was cleared rapidly from the blood stream, but the percentage remaining in blood three hours after administration is less with MDP. The deposition in the rabbit bone as observed by scintimetry could be recognized quite early with both MDP and EH DP, and what is more, a practically same level has been seen up to the one-hour observation. Though the ratios of radioactivity of kidney and soft tissue to bone increased gradually due to the gradual decrease of radioactivity in the kidney and soft tissue, MDP showed higher level.
When the bone accumulation as estimated by radioassay was represented by percent dose/1% body weight, it became MDP: 4.804, EHDP: 3.521. The bone to organ ratios were greater with MDP. By the MDP-scintigraphy of bone diseases two hours after its administration the lesion could be clearly delineated, and scintimetry ratios were superior to those by EHDP. The above findings suggest that MDP is an excellent bone scanning agent.View full abstractDownload PDF (3615K) -
—On the Estimation of the Remaining Dose following the Internal Administration—Chiaki YAMAMOTO, Yoshiaki TANAKA, Tsuneo SASAKI, Masao KANEKO1977Volume 26Issue 6 Pages 389-392
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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—Spleen/Liver Ratios and Compton Scattering.—Fumio SHISHIDO, Hitoshi MISHINA, Tadashi TAIMA, Nobuo SATO, Insu LIM, ...1977Volume 26Issue 6 Pages 393-395
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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Chiri YAMAGUCHI1977Volume 26Issue 6 Pages 396-399
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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Kazuto HATA, Masaru TAKAGI, Yoshiyuki ONO, Yoshiharu SHINOZAKI, Tatsuo ...1977Volume 26Issue 6 Pages 400-402
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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Fumio KINOSHITA, Riichi BABA, Yasushi SHICHIRI, Tetsuya FUNAHASHI, Ryo ...1977Volume 26Issue 6 Pages 403-405
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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Fumio KINOSHITA, Akira MAEKAWA, Tetsuya FUNAHASHI, Kunio TORIYA, Hiyor ...1977Volume 26Issue 6 Pages 406-408
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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Makoto SEKIMOTO, Yukiharu MAJIMA, Yoshiki KANASAKI, Hiroaki AKAGI1977Volume 26Issue 6 Pages 409-412
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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Machiko KUMANO, Kazuyuki NARABAYASHI, Tomoho MAEDA1977Volume 26Issue 6 Pages 413-416
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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—Experience with Thallium-201 in Detection of Myocardial Infarction—Kinji SAKUYAMA, Yoshitaka KAWAI, Yoshihiko NOMURA, Nagao YASUTOMI, Mit ...1977Volume 26Issue 6 Pages 417-420
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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—Comparison between viable tumor tissue and inflammatory infiltration around tumor—Atsushi ANDO, Kenji DOISHITA, Itsuko ANDO, Sigeru SANADA, Tatsunosuke ...1977Volume 26Issue 6 Pages 421-422
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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Yu-Chai YEH, Harumi KAJI, Kenji YOSHIHARA, Takanobu SHIOKAWA1977Volume 26Issue 6 Pages 423-424
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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Takanobu SHIOKAWA, Kenji YOSHIHARA, Masuo YAGI, Kenjiro KONDO1977Volume 26Issue 6 Pages 425-431
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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Air Monitoring (2) Monitoring of Radioactive Particulate Material Concentration in AirHozumu YAMAMOTO, Masami KISHIDA1977Volume 26Issue 6 Pages 432-442
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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1977Volume 26Issue 6 Pages A1731-A1282
Published: June 15, 1977
Released on J-STAGE: July 21, 2010
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