ABSTRACT
Objective To observe the meshed capillary pattern(CP)on the surface of colorectal lesions by narrow-band imaging system with magnifying endoscopy(NBI-ME),and to distinguish neoplasm from non-neoplasm by the change of capillary patterns.Methods A total of 144 colorectal lesions in 102 patients detected by conventional colonoscopy were evaluated by NBI-ME to observe the CP on surface,and by staining magnifying colonoscopy to observe the pit pattern.Results All lesions were resected endoscopically (129/144)or by surgery(15/144),and the pathological evaluation diagnosed 30 cases of non-neoplasm (including 20 cases of hyperproliferative polyps and 10 of inflammatory polyps)and 1 14 cases of neoplasm (including 95 cases of adenoma and 19 cases of adenocarcinoma).The diagnostic accuracy rate,sensitivity and specificity of conventional colonoscopy were 75.7%,85.1%and 40.O%,respectively,which were significantly lower than those of NBI-ME and staining magnifying colonoscopy(P＜0.005),while there was no significant difference between NBI-ME and staining magnifying colonoscopy.The CP of type Ⅰ,Ⅱ,Ⅳ and Ⅵa were totally correspondent with pit pattern of type Ⅰ,Ⅱ,Ⅳ and ⅤI. Conclusion NBI-ME findings of colorectal lesions correlated with those of staining magnifying colonoscopy.These two techniques are both helpful in differentiating colorectal neoplasms from non-neoplasms.
ABSTRACT
Objective To investigate clinical characteristics of cerebral blood perfusion in patients with T2DM and T2DM accompanied with hypertension.A part of the patients were studied on the metabolism of cerebral galactoside. Methods 99mTc-ECD was injected into 77 patients diagnosed as T2DM,and SPECT imaging of the cerebral cortex was done. And also 18 F-FDG imaging of the cerebral cortex was done in twelve of them. Results In T2DM patient the radioactivity was decreased in the temporal lobes of the cerebral cortex. Conclusion Our investigation demonstrates that although some older T2DM patients do not suffer from brain vascular accidents, all of them have a decreased cerebral blood perfusion and decreased cerebral metabolism. The early checked cerebral blood perfusion and metabolism may be important for these patients.
ABSTRACT
Objective To investigate the evidence of effective therapy of transient ischemic attacks (TIA) through the study on the regional cerebral blood flow and the function of neurocyte in the symptom free phase Methods Forty one patients with TIA and 45 controls were examined by single photon emission computed tomography (SPECT), computed tomography cerebral perfusion imaging (CTPI) and the positron emission tomography (PET) Results The abnormal rate of SPECT examination was 95 1%, and abnormal perfusion rate of CTPI was 63 4% These results revealed that there were reduction of regional cerebral blood flow in above half of TIA patients SPECT showed abnormal in some patients with normal CTPI show, which was possibly because of abnormal function of neurocyte, and the latter was confirmed by PET Conclusion Patients with TIA should have not only abnormal function of neurocyte, but also have reduction of regional cerebral blood flow in the intermittent phase The therapy of TIA should be emphasized in order to prevent TIA relapse and the occurrence of irreversible changes