This study is to compare the accuracy of evaluation regarding the volume of the prostate, which three-dimensional volume rendering was produced the shape of protrusion, by measuring two kinds of craniocaudal length from the top of the protrusion and from the exclusion of the protrusion as the starting points. For the imaginary protrusion prostate models, total of 10 models were roughly made by using devils-tongue jelly and changing each of the 10 ml of capacity from 10 ml to 100 ml. For the protrusion prostate models aimed at estimating the real volume, through 64 cannel computed tomography (CT) and 3.0 tesla magnetic resonance image (MRI) were conducted by planimetry technique from three-dimensional volume rendering. And then we performed to evaluate on significance of these volumes by wilcoxon signed rank test. Also the obtained volumes data by ellipsoid volume formula were measured the volume of protrusion prostate models two times with each method using the two kinds of craniocaudal length from top of the protrusion and from exclusion of the protrusion as the starting points. Finally, the significance of differences using wilcoxon signed rank test was evaluated between the real volume by planimetry technique and the measured volume by ellipsoid volume formula from three-dimensional volume rendering. The average of the protrusion length on the models was 0.90+/-0.18 mm in CT and was 0.75+/-0.11 mm in MRI. There were not statistically significant difference between MRI and CT from the volume of protrusion prostate models (p=0.414). In MRI (p=0.139) and CT (p=0.057), there were not statistically significant difference between the real volume by planimetry technique and the measured volume by ellipsoid volume from exclusion of the protrusion as the starting points. While, there were statistically significant difference between the real volume by planimetry technique and the measured volume by ellipsoid volume from top of the protrusion as the starting points in MRI (p=0.005) and CT (p=0.005). For the accurate measurement of the protrusion prostate models, the craniocaudal length of the prostate should be measured from the exclusion of the protrusion as the starting points.
Magnetic Resonance Spectroscopy ; Prostate

No abstract available.
Magnetic Resonance Spectroscopy ; Magnetics ; Magnets

OBJECTIVETo study the chemical constituents of the essential substance from the Polygonum oriental.

METHODChromatographic techniques were employed for isolation and purification of the constituents and their structures were determined by spectral analysis and chemical evidence.

RESULTSeven compounds were obtained and identified as ombuine-3-O-beta-D-galactopyranoside (1), ombuine-3-O-rutinoside (2), tryptophan (3), quercetin-3-O-methyl ether (4), kaempferol-3-O-(2"-O-alpha-L-rhamnopyranosyl) -beta-D-glucuronopyranoside (5), quercetin-3-O-(2"-O-alpha-L-rhamnopyranosyl)-beta-D-glucuronopyranoside (6), quercetin-3-O-beta-D-glucuronide (7).

CONCLUSIONCompounds 4-7 were isolated from P. oriental for the first time and compounds 1-3 were firstly obtained from the genus Polygonum. The total 1H and 13C-NMR date of compound 1 were assigned for first time.

Rhabdomyolysis is a potentially life-threatening disease which may result from a variety of causes. We describe the features of magnetic resonance imaging(MRI) and bone scintigraphy, and their importance for diagnosis and treatment of a patient with rhabdomyolysis.
Humans ; Magnetic Resonance Spectroscopy ; Rhabdomyolysis

No abstract available.
Magnetic Resonance Spectroscopy ; Magnetics ; Magnets

No abstract available.
Embolism, Fat* ; Magnetic Resonance Spectroscopy*

36 patients with age of 15-63 found the cerobrovascular pathology during 2/1997-2/1998 in friendship hospital by the cerebrovascular angiography. Methods: analysis of cerebral parenchyma to find the empty focus of sign and abnormal focus, taking the vascular photograph and analysis of the cerebrovasular by resetting as MIP program comparing with the images of CT scanner, image of DSA technique (4 patients) and results of operation (6 patients). The results have shown that the comparison of the operation (6 patients) with the angiography as technique DSA found that the MRI were suitable with the arteries with diameter of 5 mm and the abnormality of the vascular. The MRI of the cerebral parenchyma give the images which was more obviously than these of CT. scanner
Magnetic Resonance Spectroscopy ; Cerebrovascular Trauma

Magnetic resonance imaging (MRI) is an excelent explorating method for possibility of early and precise diagnosis, especially in the brain tumors and medullary lesions. The author presents special 9 cases of brain tumors and medullary lesions, which have been diagnosed by MRI, and operated at the department of Neurosurgery Hanoi Saint-Paul Hospital in 1997
Magnetic Resonance Spectroscopy ; Brain Neoplasms

Ligularia duciformis is a plant of the Ligularia genus (Compositae) which has been reported to have therapeutic effects of treating diseases such as bronchitis and coughing. In order to find out the bioactive components, the 85% ethanol extract of the root and rhizome of L. duciformis was treated by solvents extraction and column chromatography on silica gel and Sephadex LH-20. Six compounds were obtained from the ethyl acetate fraction and identified as 3-methoxy-4-hydroxyphenylpropyl caffeate (I), 6beta, 8beta-dihydroxyeremophil-7 (11)-en-12, 8alpha-olide (II), 6beta, 8alpha-dihydroxyeremophil-7 (11)-en-12, 8beta-olide (III), 6beta-hydroxyeremophil-7 (11)-en-12, 8alpha-olide (IV), stigmasterol (V) and beta-daucosterol (VI) by analysis of their physic-chemical constants and spectral data. Compound I is a new compound and compounds II - V were isolated from L. duciformis for the first time. The antitussive effect of the compounds is under evaluation.
Asteraceae ; chemistry ; Magnetic Resonance Spectroscopy

It is difficult to reflect the properties of samples from the signal directly collected by the low field nuclear magnetic resonance (NMR) analyzer. People must obtain the relationship between the relaxation time and the original signal amplitude of every relaxation component by inversion algorithm. Consequently, the technology of T2 spectrum inversion is crucial to the application of NMR data. This study optimized the regularization factor selection method and presented the regularization algorithm for inversion of low field NMR relaxation distribution, which is based on the regularization theory of ill-posed inverse problem. The results of numerical simulation experiments by Matlab7.0 showed that this method could effectively analyze and process the NMR relaxation data.
Algorithms ; Humans ; Magnetic Resonance Spectroscopy