We have established a digital coronary angiograph-analyzing system on the principle of coronary angiographic impulse response, and combined the system with the quantitative coronary analysis (QCA) for investigating the coronary microcirculation (Tmicro(-1)), the minimal stenotic diameter of coronary (MLD) and coronary hemodynamic parameters (mAP, CFV, Rcor) in 20 patients with coronary stenosis. The results showed the minimal stenotic diameter (MLD) and Tmicro(-1) decreased, with the increase of stenosis of proximal coronary. After successful percutaneous coronary intervention treatment, the Tmicro(-1) increased with the increase of MLD and was in linear correlation with MLD (r = 0.87, P < 0.001). In conclusion, The index Tmicro(-1) detected by coronary digital angiographic impulse response analysis system in combination with CFV and QCA would help to evaluate the level of integrated diagnosis of coronary lesion in regard to anatomy and physiology as well as to macro and microcirculation.
Coronary Angiography ; Coronary Circulation ; physiology ; Coronary Stenosis ; diagnostic imaging ; physiopathology ; Humans ; Microcirculation ; physiology

Purpose To investigate the application value in diagnosis of pleural effusion by cell block combined with immunohisto-chemistry. Methods 60 cases of pleural effusion were collected, and paraffin-embedded cell block was prepared and immunohisto-chemistry was used to detect the expression of CK7, TTF-1, E-cadherin, CEA and Calretinin. Results By use of cell block combined with immunohistochemistry, malignant detected rate was higher than that of the conventional centrifugal smear. There was statistical significance in the expression of CK7, TTF-1, E-cadherin, CEA and Calretinin between pleural effusion lung adenocarcinoma and reac-tive hyperplasia mesothelial cells (P<0. 05). CK7, TTF-1, E-cadherin and CEA were highly expressed in pleural effusion of lung ad-enocarcinoma cell. Calretinin was highly expressed in hyperplastic mesothelial cells. Conclusion Cell block and immunohistochemi-cal technique combination in the differential diagnosis of difficult pleural effusion has important clinical significance. It is worthy of popularization and further clinical application.

Based on the analyses of coronary physiology and the principle of fluid mechanics, a Computer Assistant Analysis (CAA) system was built with coronary angiography hardware as well as development of software. With the CAA system,the coronary blood velocity was measured by "Digital Tracing Technique (DTT)" method, and related analysis was performed with Doppler blood the silk (the standard of gold) or TIMI surname blood in 80 cases clinical cases. The results showed a positive correlation (r1 = 0.79, p1 < 0.001) between Vmean (The average blood velocity of LAD, 17.98 +/- 5.66 cm/s) by measurement using digital tracking technique and Average peak velocity (APV:17.70+/-5.77 cm/s) at approximate and distal of LAD by measurement using Doppler wire; and a negative correlation (r=-0.51, P<0.05) with TIMI surname blood (18.58 +/- 6.46 cms/ s vs 28 +/-7.5 frames). The research and clinical application result enunciates: The coronary blood velocity dynamics measured by DTT method is a scientific index applicable to clinical examination for coronary diseases, which would be useful in enhancing the diagnostic ability integrated in anatomy and physiology during conventional angiography.
Aged ; Angiography, Digital Subtraction ; methods ; Blood Flow Velocity ; Coronary Angiography ; methods ; Coronary Artery Disease ; diagnostic imaging ; Coronary Circulation ; physiology ; Humans ; Image Processing, Computer-Assisted ; methods ; Middle Aged

OBJECTIVETo investigate the distribution of hyaluronic acid (HA) with iohexol tracing in the knee joint cavity of rabbits using CT plain scan, three-dimensional reconstruction and Χ-ray and observe how different injection sites affect HA distribution.

METHODSMixtures of HA and iohexol (tracer) were prepared that contained final iohexol concentrations of 2.5%, 5%, 10%, 20%, or 40%. The HA-iohexol mixtures (0.5 ml) were injected into rabbit knee joints, and the optimal iohexol concentration that allowed clear differentiation of the injected agents from the surrounding tissues was determined using dual-source CT plain scan and three-dimensional reconstruction technique. The HA-iohexol mixture (0.5 ml) containing the optimal concentration of iohexol was then injected into the knees of the rabbits either through the patella medial approach or the medial joint line approach, and HA distribution in the knee joint cavity was observed using CT scan and Χ-ray.

RESULTSThe CT value of HA-iohexol mixture increased progressively with the tracer concentration. After injection of the mixture containing 2.5%, 5%, 10%, 20%, and 40% iohexol, the CT value ratios of the soft tissue, HA-iohexol mixture and bone cortex were 2:7:46, 2:14:44, 2:28:44, 2:60:46, and 2:98:45, respectively, and a iohexol concentration of 5% was determined as optimal for differntiating the injected agents from the surrounding tissues. The HA-iohexol mixutre containing 5% iohexol injected through the medial-patellar approach was distributed mainly over the patello-femoral joint, and that injected through the joint line approach was found mainly over the tibio-femoral joint.

CONCLUSIONHA-iohexol mixture containing 5% iohexol allows clear differentiation of bone cortex and soft tissues in rabit knee joint from the injected agents on CT scan and Χ-ray, and the injection approach can influence HA distribution in the knee joint cavity.

Animals ; Contrast Media ; Hyaluronic Acid ; metabolism ; Iohexol ; Knee Joint ; Rabbits ; Tissue Distribution ; Tomography, X-Ray Computed

Objective To analyze solitary fibrous tumor (solitary fibrous tumor, SFT) ’s clinical manifestations, patholog-ical features, immunohistochemical phenotype, and follow-up, discuss the diagnosis, differential diagnosis and progno-sis. Methods Ten cases of SFT were analyzed by clinical data and follow-pathological characteristics study and im-munohistochemical staining of Vimentin, CD34, Bcl-2, CD99, SMA and β-catenin. Results There were 6 males and 4 females with ranging in age from 31 to 78 years (mean 53.2 years old). SFT in four cases originated from the visceral pleura, two cases from parietal pleura,one from the skin of the chest wall, one from the neck, one from the medi-astinum, one from subcutaneously. Microscopic examination of tumor tissue was mainly composed of spindle cells, dif-ferent levels of visible cells and cell-rich areas of sparse areas, tumor cells were short spindle or oval, mitotic due to the severity varies. During the visible rich collagen fibers, may be associated with hyaline degeneration or myxoid change. Immunohistochemistry revealed the tumor cells expessed Vimentin, CD34, Bcl-2, CD99 and β-catenin, SMA focal or weakly positive. Conclusion SFT may occur in various sites of the body. The clinicopathological features and immunohistochemical profile are helpful to identify SFT. Its biological behavior is consistent with its histological mor-phology and growth the way. If tumor could be removed completely, the patients may have a good prognosis;some have low-grade malignant or malignant behaviour, manifesting as local recurrence or metastasis. Patients need long-term follow-up.