RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Volume 40 , Issue 8
Showing 1-7 articles out of 7 articles from the selected issue
  • Manabu AOKI, Akira IWAMURA, Eisuke GOTO, Yutaka MORI, Kenji KAWAKAMI, ...
    1991 Volume 40 Issue 8 Pages 313-318
    Published: August 15, 1991
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Accuracy of bone mineral measurement by the dual photon absorptiometry (DPA) was studied in comparison to ashed bone mineral (ash) on the lumbar spine of 23 cada vars.
    There was a high correlation (r=0.896) between the value of DPA and ash weight. Bone mineral content in the radius by the single photon absorptiometry (SPA) did not correlate to bone mineral density (BMD) by DPA in the patients with hemodialysis.
    SPA may be less useful to assess BMD of the whole body.
    Fat mass and lean mass measured by DPA were well correlated to the value obtained by the electrical impedance method. Precision in measurement of fat mass and lean mass was also confirmed by the electrical impedance method.
    These results suggest that DPA has a high precision for measurements of the bone mineral and the body composition.
    Download PDF (463K)
  • Yuji TAKAO, Hajime MURATA, Masahisa ONOGUCHI, Eiji OHTAKE, Kenichi KAT ...
    1991 Volume 40 Issue 8 Pages 319-324
    Published: August 15, 1991
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    To evaluate the usefullness of a new radiotracer, 99mTc methoxy isobutyl isonitrille (99mTc-MIBI), rest and stress 99mTc-MIBI myocardial single photon emission computed tomography (SPECT) were compared with stress 201Tl myocardial SPECT in the same 10 effort angina pectoris patients with only left anterior descending artery (LAD) stenosis.
    In the stress scan, the number and the severity of abnormal segments in LAD territories were higher by 201Tl than those by 99mTc-MIBI. Sensitivity in the detection of abnormality by 99mTc-MIBI was as high as that by 201Tl (90% vs. 100%) . However, specificity by 99mTc-MIBI tended to be higher than that by 201Tl (70% vs. 55%), because the more false-positive segments were observed in 201Tl SPECT, In comparison of images between rest scan by 99mTc-MIBI and delayed scan by 201Tl, the rate and degree of normalization in 99mTc-MIBI SPECT was higher than those of redistribution in 201Tl SPECT.
    Thus, our results indicate that 99mTc-MIBI myocardial SPECT was more reliable than 201Tl for the evaluation of the extent of ischemic lesion or viable tissue in the ischemic heart disease.
    Download PDF (707K)
  • Larion LEBEDEV
    1991 Volume 40 Issue 8 Pages 325-332
    Published: August 15, 1991
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Three methods were used to obtain dose distribution inside human body : experimental, semiempirical and numerical. The computer code was developed for calculations of dose equivalents in 23 organs of adult mathematical phantom for photon energies from 10 keV to 150 keV. The X-ray spectra were measured for 5 types of X-ray sets by using NaI (Tl), Si (Li) and Ge (Li) detectors. The organ doses and effective dose equivalents were determined for 47 types of X-ray diagnostic examinations. It was shown, that the estimated effective dose equivalent is 1.4 mSv/person-year due to medical irradiation for the population of the USSR.
    Download PDF (2176K)
  • Tomoaki SANO, Takaaki HORIKAWA, Masayuki KANEKO
    1991 Volume 40 Issue 8 Pages 333-336
    Published: August 15, 1991
    Released: January 31, 2011
    JOURNALS FREE ACCESS
    67Ga tumor scintigraphy was attempted in a hamster, using a pinhole collimator improved for small animal scintigraphy, to examine whether DMBA induced experimental cheek pouch carcinoma could be demonstrated or not. The spot scan maxillofacial images cleary showed the fine uptakes of 67Ga in the carcinoma lesions. The results obtained from this modality could be apllied in the experimental studies on DMBA induced cheeck pouch carcinomas, and that the most desirable images were obtained under the condition of exposure 400, distance 0 cm and counts 400 kc.
    Download PDF (6481K)
  • Yasuo KUWABARA, Yuichi ICHIYA, Makoto OTSUKA, Masayuki SASAKI, Toshimi ...
    1991 Volume 40 Issue 8 Pages 337-340
    Published: August 15, 1991
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Myocardial SPECT imaging using 123I-MIBG was performed in 29 patients with cardiac disorders and compared with the results of 201Tl SPECT imaging. The areas with decreased uptake of 123I-MIBG was usually more extended than those observed with 201Tl SPECT, which was more prominent in the delayed scan than in the early scan. In the 2 patients out of 4 with hypertrophic cardiomyopathy, the distribution of 123I-MIBG and 201Tl was not matched. Namely, high uptake of 123I-MIBG was observed in the regions with low 201Tl uptake. The washout rate for 123I-MIBG was higher in the region with decreased myocardial wall motion than those with preserved wall motion.
    Download PDF (3353K)
  • Kunihiko OBATA
    1991 Volume 40 Issue 8 Pages 341-346
    Published: August 15, 1991
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    Download PDF (3705K)
  • 1991 Volume 40 Issue 8 Pages A43P-A86M
    Published: August 15, 1991
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    Download PDF (3376K)
feedback
Top