Objective Using manganese enhanced MR imaging(ME-MRI)as a standard to validate the accuracy of white matter diffusion tenor tractography(DTT)with different gradients orientations in macaque monkeys.Methods Seven adult male macaque monkeys were scanned for DTY images with different number of gradients orientations.When all data were acquired.3 μl of 0.8 mol aqueous solution of MnCl2 was injected into the primary motor cortex representing forelimb for ME-MRI scanning 48 hours later.On the images of fractional anisotropy(FA),seed region for fiber tracking was chosen according to the subcortical enhanced range on ME-MRI,then the DTT fiber tracts proiecting on axial images of FA were compared with enhancement region on T1WI of ME-MRI.Results Under the calculation method for fiber tracking in the study,different motion-probing gradients orientations led to results consistent with ME-MRI for the brain above the midbrain level.All group's concordance score of fibertracking results were good.Among them,30 and 64 orientation fiber tracking results were optimal.Below the midbrain level,there was significant difference between DTT fiber tracking and ME-MRI fiber tracking. Conclusion Different motion-probing gradients orientations do not influence DTT fiber tracking.But below the midbrain level.the results of DTT fiber tracking were not reliable according to the standard results of ME-MRI fibe tracking.

This study aims to explore the clinical value of the computer-aided diagnosis (CAD) system for early detection of the pulmonary nodules on digital chest X-ray. A total of 100 cases of digital chest radiographs with pulmonary nodules of 5-20 mm diameter were selected from Pictures Archiving and Communication System (PACS) database in West China Hospital of Sichuan University were enrolled into trial group, and other 200 chest radiographs without pulmonary nodules as control group. All cases were confirmed by CT examination. Firstly, these cases were diagnosed by 5 different-seniority doctors without CAD, and after three months, these cases were re-diagnosed by the 5 doctors with CAD. Subsequently, the diagnostic results were analyzed by using SPSS statistical methods. The results showed that the sensitivity and specificity for detecting pulmonary nodules tended to be improved by using the CAD system, especially for specificity, but there was no significant difference before and after using CAD system.
China ; Diagnosis, Computer-Assisted ; Early Diagnosis ; Humans ; Lung ; pathology ; Radiographic Image Enhancement ; Radiography, Thoracic ; Thorax

Aged ; Humans ; Male ; Neoplasms, Muscle Tissue ; Skull Neoplasms ; Temporal Bone ; pathology

Re-evaluation of bioequivalence of generic drugs is one of the key research focus currently. As a means to ensure consistency of the therapeutic effectiveness of drug products, clinical bioequivalence has been widely accepted as a gold standard test. In vitro dissolution testing based on the theory of the BCS is the best alternative to in vivo bioequivalence study. In this article, the conventional dissolution method and flow-through cell method were used to investigate the dissolution profiles of domestic amoxicillin capsules in different dissolution media, and the absorption behavior of the drugs with different release rates (t85% = 15-180 min) in the gastrointestinal tract was predicted by Gastro Plus. The flow-through cell method was thought better to reflect the release characteristics in vivo, and amoxicillin capsules with regard to the release rates up to 45 min (t85% = 45 min) were having a satisfied bioequivalence with the oral solution according to the C(max) and AUC. Although two different dissolution profiles of domestic amoxicillin capsules were found by flow-through cell methods, prediction results revealed that domestic capsules were probably bioequivalent to each other.
Amoxicillin ; pharmacokinetics ; Capsules ; Computer Simulation ; Gastrointestinal Tract ; Humans ; Software ; Solubility ; Therapeutic Equivalency

Objective To evaluate the value of reconstruction of three-dimentional CT in development dislocation of hip(DDH)in children.Methods Twelve cases of DDH concluded 4 bilateral and 8 unilateral cases.To sum up,16 sick hips were operated and 8 normal hips were also obtained by three-dimensional CT(Hip speed Fi/x,GE Co).Results 3D reconstruction were used to show femoral head,(acetabulum) and relationship of acetabulum and femoral head respectively.The difference between FNA measurement of sick hips and those of normal hips were significant(P

Objective To explore the clinical characteristics ,diagnosis, treatment and prognosis of phaeohyphomycosis. Methods Clinical data were collected, including history, physical examination, cranial and spinal imaging. Brain biopsy was performed. Data of the pathology and incubation of brain tissue were analyzed. Responsiveness to treatment was followed up. Results A previously healthy three and half years old boy was presented to our unit, with a three- month history of recurrent headache, vomiting, progressive paraplegia accompanied by urinary continence and constipation. A computed tomogram scan and magnetic resonance imaging of the brain revealed multiple lesions located in the region of the parietal - occipital lobes, periventricular area and frontal lobe, with prominent surrounding edema and irregular peripheral enhancement of the mass after the administration of contrast materials. A cerebral biopsy was performed and the pathological report was cerebral phaeohyphomycosis. The culture of the tissue and cerebrospinal fluid grew a same fungus identified as exo-phiala dermatitidis. The patient's response to therapy was poor, the parents of the boy gave up therapy, and the boy died 1 month later. Conclusions Cerebral Phaeohyphomycosis caused by Exophiala dermatitidis is rare, but the most serious form of fungus infection. Pathology and incubation of the tissue are essential for diagnosis. There is no curative therapy and the prognosis is poor.

Objective To investigate the clinical epidemiologic features of transient synovitis(TS) of hip in children occurred in Shen-zhen district.Methods The medical files were reviewed and a standard questionnaire was filled according to the conditions of 705 cases such as pathogeny,clinical manifestation,therapy and prognosis.Results Transient synovitis occurred in a sporadic form all the year round.The peak age of patients with TS was 3-7 years old.The ratio of boys to girls was 2.9:1.About 19.3% patients were attacked an upper respiratory tract infection and 11.9% patients attributed the symptoms to trauma or severe activities before 1 week.A varying degree of painful limp and restriction of movement at the hip were found clinically.All of cases were cured by skin traction.The incidence of recurrence was 6.95%.Conclusions Male predominance is found in TS.It is characteristic of sporadic form in the 4 seasons and intently relation to an upper respiratory tract infection and trauma or severe activities.TS is recurrent and the prognosis is good by skin traction.

AIM: To observe the clinical curative effect of sparse wind clearing heat method combined with western medicine treatment on epithelial herpes simplex keratitis ( HSK) .
METHODS: A total of 75 cases ( 75 eyes ) of patients with epithelial HSK were divided into the treatment group 38 cases ( 38 eyes ) and the control group 37 cases ( 37 eyes) . The patients of the control group were treated with ganciclovir drop and symptomatic treatment. On the basis of the above treatment plan, the patients of the treatment group were treated with sparse wind clearing heat decoction. Clinical curative effect was observed and analyzed.
RESULTS:In the treatment group, curative rate was 79% and effective rate was 95%. In the control group, curative rate was 54% and effective rate was 78%. The differences had significant difference between the two groups (P<0. 05). The corneal lesion healing index in the treatment group was better than that in the control group (P<0. 05). At 6mo follow-up the recurrence rate was 10%in the treatment group, and the control group with 40%, and there was significant difference between the two groups ( P < 0. 05 ). The average healing time of the treatment group was 14. 74±8. 58d, and the control group was 19. 68 ± 8. 71d. There was significant difference between the two groups (P<0. 05).
CONCLUSION: Sparse wind clearing heat method combined with western medicine treatment on epithelial HSK has preferably curative effect.

Traditional Chinese medicine (TCM) reference standards plays an important role in the quality control of Chinese herbal pieces. This paper overviewed the development of TCM reference standards. By analyzing the 2010 edition of Chinese pharmacopoeia, the application of TCM reference standards in the quality control of Chinese herbal pieces was summarized, and the problems exiting in the system were put forward. In the process of improving the quality control level of Chinese herbal pieces, various kinds of advanced methods and technology should be used to research the characteristic reference standards of Chinese herbal pieces, more and more reasonable reference standards should be introduced in the quality control system of Chinese herbal pieces. This article discussed the solutions in the aspect of TCM reference standards, and future development of quality control on Chinese herbal pieces is prospected.
Drugs, Chinese Herbal ; standards ; Humans ; Medicine, Chinese Traditional ; standards ; Quality Control ; Reference Standards

Adolescent ; Adult ; Ear, Middle ; diagnostic imaging ; Female ; Humans ; Imaging, Three-Dimensional ; Male ; Mastoid ; diagnostic imaging ; Middle Aged ; Tomography, X-Ray Computed ; Young Adult