TIFFANY TING-FANG SHIHChang C.-J.WEN-YIH TSENGHsiao J.-K.Shen L.-C.Liu T.-W.PAN-CHYR YANG2020-12-022020-12-0220040033-8419https://www.scopus.com/inward/record.uri?eid=2-s2.0-1642277245&doi=10.1148%2fradiol.2311030382&partnerID=40&md5=d4962f2cbbccb689d5c22e0f42ef87e6https://scholars.lib.ntu.edu.tw/handle/123456789/523887PURPOSE: To investigate the effect of calcium channel blockers on blood perfusion of vertebral bone marrow in the lumbar spine. MATERIALS AND METHODS: Sixteen healthy volunteers (eight men and eight women) underwent dynamic contrast material-enhanced magnetic resonance (MR) imaging of the lumbar spine. One hundred twenty minutes after the first MR examination, each subject ingested 10 mg sublingual nifedipine before undergoing a second MR examination 20-25 minutes later. Semiquantitative (peak enhancement ratio and enhancement slope) and quantitative (amplitude and rate constant of the exchange [K out]) parameters were analyzed with the time-intensity curve. Data obtained before and after administration of nifedipine were compared. The Wilcoxon signed rank test and Spearman rank correlation test were used. RESULTS: Median peak enhancement ratio of vertebral bodies decreased from 0.60 (mean ± SD, 0.68 ± 0.29) to 0.51 (mean, 0.56 ± 0.24) after administration of nifedipine. Median and mean decreases were 0.11 and 0.12 ± 0.15, respectively, and the percentage difference was 17% (P = .005). A P value of less than .05 was considered to indicate a statistically significant difference. Median enhancement slope changed from 0.45 (mean, 0.45 ± 0.13) to 0.41 (mean, 0.40 ± 0.24). Median and mean changes were 0.05 and 0.04 ± 0.23, respectively, and the percentage difference was 9% (P = .334). Median amplitude changed from 0.059 (mean, 0.059 ± 0.028) to 0.045 (mean, 0.048 ± 0.023). Median and mean changes were 0.008 and 0. 011 ± 0.025, respectively, and the percentage difference was 18% (P = .072). Median Kout changed from 0.068 (mean, 0.063 ± 0.018) to 0.067 (mean, 0.066 ± 0.028). Median and mean changes were 0.011 and 0.004 ± 0.028, respectively (P = .404). Nifedipine affected peak enhancement ratio significantly but did not affect enhancement slope, amplitude, or Kout. Data before and after administration of nifedipine showed no differences between men and women. Spearman rank correlation coefficients suggest no significance between the differences in heart rate and blood pressure and the differences in peak enhancement ratio, enhancement slope, amplitude, or Kout. CONCLUSION: After sublingual administration of nifedipine, the peak enhancement ratio of vertebral bone marrow decreased. ? RSNA, 2004.[SDGs]SDG3calcium channel blocking agent; contrast medium; gadolinium pentetate; gadolinium pentetate meglumine; nifedipine; adult; article; blood flowmetry; blood pressure measurement; bone marrow; clinical trial; contrast enhancement; controlled clinical trial; controlled study; correlation coefficient; drug effect; evaluation; female; heart rate; human; human experiment; image analysis; image enhancement; lumbar spine; male; normal human; nuclear magnetic resonance imaging; parameter; priority journal; quantitative analysis; sex difference; tissue perfusion; vertebra; vertebra body; Wilcoxon signed ranks test; Adult; Blood Pressure; Bone Marrow; Calcium Channel Blockers; Diastole; Female; Heart Rate; Humans; Lumbar Vertebrae; Magnetic Resonance Imaging; Male; Middle Aged; Nifedipine; Perfusion; Radiographic Image Enhancement; Reference Values; Sex Factors; Statistics, Nonparametric; Systolejournal article10.1148/radiol.2311030382150689372-s2.0-1642277245