- 著者
- Ehara Mariko Surmely Jean-Francois Kawai Masato Katoh Osamu Matsubara Tetsuo Terashima Mitsuyasu Tsuchikane Etsuo Kinoshita Yoshihisa Suzuki Tomomichi Ito Tatsuya Takeda Yoshihiro Nasu Kenya Tanaka Nobuyoshi Murata Akira Suzuki Yasuyuki Sato Koyo Suzuki Takahiko
- 出版者
- 社団法人日本循環器学会
- 雑誌
- Circulation journal : official journal of the Japanese Circulation Society (ISSN:13469843)
- 巻号頁・発行日
- vol.70, no.5, pp.564-571, 2006-04-20
- 参考文献数
- 23
- 被引用文献数
- 19 174
Background Multislice computed tomography (MSCT) is a promising noninvasive method of detecting coronary artery disease (CAD). However, most data have been obtained in selected series of patients. The purpose of the present study was to investigate the accuracy of 64-slice MSCT (64 MSCT) in daily practice, without any patient selection. Methods and Results Using 64-slice MSCT coronary angiography (CTA), 69 consecutive patients, 39 (57%) of whom had previously undergone stent implantation, were evaluated. The mean heart rate during scan was 72beats/min, scan time 13.6s and the amount of contrast media 72mL. The mean time span between invasive coronary angiography (ICAG) and CTA was 6 days. Significant stenosis was defined as a diameter reduction of >50%. Of 966 segments, 884 (92%) were assessable. Compared with ICAG, the sensitivity of CTA to diagnose significant stenosis was 90%, specificity 94%, positive predictive value (PPV) 89% and negative predictive value (NPV) 95%. With regard to 58 stented lesions, the sensitivity, specificity, PPV and NPV were 93%, 96%, 87% and 98%, respectively. On the patient-based analysis, the sensitivity, specificity, PPV and NPV of CTA to detect CAD were 98%, 86%, 98% and 86%, respectively. Eighty-two (8%) segments were not assessable because of irregular rhythm, calcification or tachycardia. Conclusion Sixty-four-MSCT has a high accuracy for the detection of significant CAD in an unselected patient population and therefore can be considered as a valuable noninvasive technique.
- 著者
- Horiuchi Hisashi SUZUKI Yasuyuki
- 出版者
- 一般社団法人日本物理学会
- 雑誌
- 理論物理学の進歩 (ISSN:0033068X)
- 巻号頁・発行日
- vol.49, no.6, pp.1974-2004, 1973-06-25
- 被引用文献数
- 33
Alpha-decay widths of SU_3, deformed oscillator and cluster model wave functions are calculated quantitatively for the ground band levels of ^<8>Be and the first K=0^<-> band levels of ^<20>ne. Tails of the reduced width amplitudes of these model wave functions are amended by two methods, of which one is to connect smoothly the inner original reduced width amplitude with the resonance tail given by the release energy of α particle, and the other is to apply the Green's-function method developed by Kawai and Yazaki for the calculation of the radial form factor for the stripping or pick up reactions. From comparisons of the calculated results with experiments it is concluded that the SU_3 model is insufficient to reproduce large α-decay widths. It is further shown that the deformed oscillator model is also considered to be inappropriate for the general explanation of the (rotational) levels with large cluster widths. From these consequences on SU_3 and deformed oscillator models and by the numerical confirmation that the cluster model wave functions can naturally reproduce the experiments consistently with the variational energy calculations, the importance of the molecular viewpoint in light nuclei is emphasized.