Magnetic resonance imaging has developed from a single observation of organisms’ anatomy and the change of morphology under the physiological and pathological conditions to the study of biology function and activity mechanism. Furthermore, it has entered into the molecular imaging and functional magnetic resonance imaging (fMRI), and diffusion-weighed imaging (DWI) is one of them, which is mainly used in the early diagnosis of cerebral infraction. This article elaborates diffusion-weighed imaging,the identification of acute and non-acute cerebral infarction by DWI in physiological basis of pathogenesis and the time vale of DWI examination. The author holds the opinion that it is of great significance to distinguish between acute and non-acute cerebral infarction by using DWI and that clinicians may adopt targeted therapies according to the different periods of cerebral infarction in order to avoid unsafe and unnecessarily risky treatments.

Due to the advance of CT equipment, combined with the current intensifying doctor-patient conflict, the indication of CT examination is relaxed, even expanded to the examination of benign lesions, which contributes to the blind diagnosis using CT or the so-called“Casting a big net”. However, X-rays bring two kinds of risks. One of them is the risk of the accumulated X-rays, the other one is the missed diagnosis resulting from the poor image quality, which is caused by the low amount of radiation. Therefore, how to strike a balance between these two not only becomes the focus of academic circles, but sparks the whole society’s attention. This article elaborates X-rays hazards, CT radiation does, application of Multiple Detector Spiral CT, purpose and principles of radiological protection and optimization of CT scanning technology. The author believes “exposure does individualization” can be achieved under the principle of ALARA (as low as reasonably achievable), or we can even minimize the exposure does according to the requirements of diagnosis and accept the image with appropriate noise.

[Objective] To evaluate the curative effect of Yangyin Huayu Decoction on Chronic Obstructive Disease of Lung(CODL), its influence on blood rheology. [Method] Administer Yangyin Huayu Decoction to treatment group besides basic treatment, only basic therapy for control group. [Result] The clinical sign relieving was better in treatment group than control in marked statistical meaning, the former could also markedly improve the blood rheological indexes of whole blood mucosity, blood sedimentation square K value and packed cell volume, which was different from that of control group, in obvious statistical meaning(P

Objective:To study the antibacterial activity of dental amalgam against S.mutans in vivo.Methods:Plaque samples were collected from amalgam surface 1 d,1,2,4 and 8 weeks after tooth restoration with amalgam( group of fresh amalgam) in 16 subjects and from anothor 14 subjects with amalgam tooth restoration for more than 3 years (group of aged amalgam).Plaque samples were collected only once.Isolation frequency (IF) and colony forming unite(CFU) of S.mutans were tested.The plague samples from oposite tooth were used as the controls.Results:In the group of fresh amalgam IF and CFU of S.mutans were heigher on amalgam than on the control teeth(P0.05).Conclusion:Amalgams may have inhibitory effects on the growth of S.mutans.

Serum anti-uveal autoantigen with coiled coil domains and ankyrin repeats (UACA) antibody titer was measured using ELISA in 32 patients with thyroid-associated ophthalmopathy ( TAO ) and 20 patients with Graves' disease (GD) without ophthalmopathy.The level of anti-UACA antibody in TAO group was higher than that in GD group [ (225.91 ± 144.21 vs 187.42 ± 46.77 ) pg/ml,P＜0.05 ],and especially higher in patients with ocular myopathy [ (254.35 ± 168.29 ) pg/ml ].It seems that anti-UACA antibody is the sensitive clinical marker of ocular myopathy in TAO patients.

Objective To investigate the factors relevant to the vascular calcification in uiemic patients.Methods Eighty-five uiemic patients were enrolled in this study.The levels of fetuin-A,serum calcium,serum phosphorus,C-reactive protein and other parameters related to calcification were examined.B-ultrasound was used to detect carotid plaques.Results The Fetuin-A levels in patients with vascular calcification were significantly lower than those with non-vascular calcification[(2.34±0.95) μg/L vs (3.79±1.19) μg/L,t=5.94,P＜0.01],but serum calcium,serum phosphorus and C-reactive protein were higher than those non-vascular calcification [serum phosphorus (1.97±0.23) mmol/L vs (1.80±0.33) mmol/L,t=2.05,P＜0.05;calcium and phosphorus product (50.04±6.61) mg~2/dl~2 vs (44.84±9.75) mg~2/dl~2,t=2.05,P＜0.05;C-reactive protein (33.45±25.11)mmol/L vs (20.65±13.43) mmol/L,t=2.03,P＜0.05].Linear correlation analysis indicated that low fetuin-A level was correlated with C-reactive protein (r=-0.43,P＜0.01),calcium-phosphorus product (r=-0.32,P＜0.01),serum albumin concentration (r=0.37,P＜0.05) and phosphorus level (r=-0.36,P＜0.05).Conclusions The risk factors relevant to the vascular calcification are high serum phosphorus,calcium and phosphorus product and the micro-inflammatory status in uiemic patients.Vascular calcification is also correlated with low fetuinA level,adding exogenous Fetuin-A may become an effective means in preventing vascular calcification.

The incidence of lung cancer ranks the first among malignancies in China. Studies on molecular-targeted therapy with epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs) have atracted more attention. However, many patients with non-small cell lung cancer (NSCLC) manifest primary symptoms at the beginning of therapy;other patients develop drug resistance after they receive EGFR-TKI treatment for a period. This review describes the progress on drug resistance mechanisms of EGFR-TKIs at a molecular level and the significance of such inhibitors in clinical application.

Dopa-responsive dystonia(DRD) is a clinical syndrome characterized by childhood dystonia and dramatic and sustained response to low-dose levodopa.The deficiency of any link in dopamine synthesis pathway can lead to DRD that is caused by TH gene mutation and is autosomal recessive, which results in the reduction of tyrosine hydroxylase(TH) synthesis and extensive deficiency of dopamine and catecholamine.However, DRD presents atypical clinical manifestations.Mild patients mainly present with dystonia.Some of them might progressively develop into spastic paraplegia and some may have parkinsonian features.Most of them display good response to levodopa.Severe patients present with progressively complex infantile encephalopathy, and badly response to levodopa and remnant intellectual development problems.Most of them manifest with declining homovanillic acid(HVA) in cerebrospinal fluid.However, due to the noncharacteristic clinical course and nonspecific laboratory tests of TH DRD, gene detection still is the only reliable criterion of diagnosis so far.Low-dose levodopa is effective to most mild patients and can improve symptoms to severe patients to some extent.

Present basic researches on hepatic stem cells have obtained great progress. It is believed that hepatic stem cells can differentiate into hepatic cells and biliary duct cells. Hepatic stem cells are isolated and cultured by two-step collagenase digestion method, density gradient centrifugation, centrifugal elutriation, fluorescent activation screening method and immunomagnetic beads screening method. Directional differentiation of hepatic stem cells is a complicated process, which is affected by exterior and interior cell factors under liver microenvironment where are beneficial to growth, differentiation and function of stem cells. Hepatocyte growth factor can promote the proliferation of hepatic stem cells, and accelerate the differentiation into mature hepatic cells. Transcription factor of hepatic cells play a crucial effect in regulating the differentiation of hepatic stem cells. Incomplete or abnormal differentiation of hepatic stem cells can be responsible for liver cancer. Hepatic stem cells are the potential carrier cells as a target gene for liver cancer.

Field operation infirmary should conquer many complicated situations, such as overuse of vehicles, too far maneuvering distance, too long maneuvering time, and complicated road state. The author puts forward that in the marching, the division of responsibilities and march discipline should be very strict, and vanguard should be sent before field operation infirmary, which ensure the operation infirmary to reach the destination safely and successfully.