Objective To explore the MRI features of solitary fibrous tumor(SFT)in the orbit.Methods The MRI findings of 7 patients with SFT in the orbit confirmed by histopathology were analyzed retrospectively.Re sults Of the 7 lesions,5 occurred in the right orbit and 2 in the left orbit.Six lesions were located in the extraconal space near the lacrimal gland fossa,including 5 in the superomedial region and 1 in the inferolateral region.The other one was located in the retrobulbar intraconal space.The lesions with well-defined margin showed elliptic shape in 6 cases and lobulated configuration in 1.The maximum diameter of the lesions ranged from 18 to 40 mm(mean,31 mm).The lesions showed homogeneous isointense relative to gray matter on T1-weighted images in 6 patients.On T2-weighted images,the lesions showed heterogeneous hypointense in 5 patients,isointense and hyperintense in one patient respectively.SFT demonstrated markedly homogeneous enhancement in 6 patients and inhomogeneous enhancement in one patient The time-intensity curves(TIC)of 7 patients exhibited a rapidly enhancing and rapid washout pattern on dynamic contrast-enhanced(DCE)MRI.Conclusion Hypointense signal on T2WI,marked enhancement on contrast-enhanced T1 WI,and a rapidly enhancing and rapid washout pattern TIC on DCE MRI are the typical MRI features of orbital SFT.

Objective To compare the dosimetric differences of volumetric modulated arc therapy (VMAT) for preoperative radiotherapy of rectal cancer using 6MV X-ray flattening filter-free (FFF) and flattening filter (FF) modes.Methods FF-VMAT and FFF-VMAT plans were designed for 15 rectal cancer patients with preoperative radiotherapy by planning treatment system (Eclipse 10.0),respectively.Prescription dose of PTV was 50 Gy in 25 fractions.When the plans were normalized to 50 Gy to 95 ％ of PTV,the dose volume histogram (DVH),target and risk organ doses,conformity indexes (CI),homogeneity indexes (HI),low dose volume of normal tissue (B-P),monitor units (MU) and treatment time (TT) were compared between the two kinds of plans.Results FF-VMAT provided the lower Dmean,V105,HI (P ＜ 0.05),and higher CI (P ＜ 0.05) compared with FFF-VMAT.Small intestine (D5),Bladder (D5,Dmean V40,V50),L-femoral head (V40),R-femoral head (Dmean) were lower in FF-VMAT than those in FFF-VMAT (P ＜ 0.05).FF-VMAT had higher B-P (V5) compared with FFF-VMAT (P ＜ 0.05).FF-VMAT reduced the monitor units (MU) by 21％ (382±53 vs 483±26,P ＜ 0.05),as well as the treatment time (TT) in FF-VMAT was no significant difference compared with that in FFF-VMAT [(148±4) s vs (146±3) s,P ＞ 0.05)].Conclusions The qualities of FF-VMAT and FFF-VMAT plans were comparable and both clinically acceptable.When comparing two plans,FF-VMAT showed better target coverage and some of OARs sparing.The MUs of FFF-VMAT were higher than those of FF-VMAT,yet were not delivered within the same time.

Objective To compare IMSure QA and MatriXX for intensity modulated radiotherapy plans,and to investigate the credibility of IMSure QA software.Methods Ten patients receiving intensity modulated radiotherapy were randomly chosen for the quality assurance plans with IMSure QA and MatriXX.Results The overall average of percentage pass points in 3％ and 3 mm were (98.1 ± 0.8) ％ with IMSure QA,and (97.9 ±0.6)％ with MatriXX(t =0.86,P ＞0.05).Conclusion IMSure QA can be a reliable verification tool for IMRT QA.

PurposeTo perform a quality assurance program for Truebeam imaging system using MIMI phantom, and to evaluate the accuracy of the imaging system center with the radiation isocenter and the accuracy of couch shift.Materials and Methods The reference images of MIMI phantom were acquired using CT scanner. The reference images were imported into the treatment planning system and a simple plan was created. The MIMI phantom was placed on the treatment couch. The images were acquired using the MV/KV imaging system, and a match registration was performed with the reference images from the TPS.Results Measured over six months, the precision of the imager and linac's isocenter was <1 mm, and the couch shift accuracy was <1 mm. The measurements over six months demonstrate that isocenters of the MV/KV imaging systems on Truebeam system are stable.Conclusion The accuracy of the Truebeam imaging system center and couch shift is safe and reliable. The error of Truebeam imaging system center and couch shift can be tested on a monthly base.

Aim To explore the expression of TNF-related apoptosis-inducing ligand(TRAIL)between psoriatic patients and healthy subjects.Methods Immunohistochemical staining and Real-Time PCR methods were established to detect the expression of TRAIL.Results Immunohistochemical staining results indicated a significant difference of the expression of TRAIL between psoriatic patients and healthy subjects.Real-Time PCR results indicated that the quantities were 0.42?0.07,1.01?0.16 respectively of two type skins.Thus there were significant differences(P

Objective To perform a routine quality assurance procedure for Truebeam multi-leaf collimator (MLC) using MLC quality assurance (QA) phantom,verifying the reliability of MLC during the treatment.Methods MLC QA phantom was a specialized phantom for multi-leaf collimator QA,and contained five radio-opaque spheres that were embedded in an L-shape.The phantom was placed isocentrically on the Truebeam treatment couch for the tests.A quality assurance plan was settled up in the Eclipse v10.0 so that the fields for acquiring the necessary images could be created.The images were acquired by the electronic portal imaging device (EPID),and imported into the PIPSpro software for the analysis.The tests were delivered once a week for six weeks to verify consistency of the delivery,and the images were acquired in the same manner each time.Results For the leaf position test,the average position error was (0.21 ± 0.02) mm.The leaf width was measured at the isocenter,and the average error was (0.04±0.02) mm for the leaf width test.Multi-Port test showed the dynamic leaf shift error,the average error was (0.26 ± 0.04) mm.For the leaf transmission test,the average inter-leaf leakage value was 1.0％ ± 0.14％.Conclusions The MLC system of Truebeam could operate very well and the QA phantom is a useful test tool for the MLC QA.

Objective To analyse clinical application of reversed anterolateral thigh adipefascial flap in repair of defects around the knee. Methods Reversed anterolateral thigh adipofascial flap was employed to repair defects of knee and upper shank in five patients from July 2006 to April 2007. The perforator arteries were detected and labelled with a hand held Doppler flowmeter before operation. The size of flaps containing perforator artery ranged from 6 cmx 8 cm to 12 cm×13 cm. After the descending branch was severed at the bifurcation of the lateral circumflex femoral artery, the flaps were elevated distal-ly to cover the defects of the knee and upper part of the shank. A split thickness graft was harvested to cover the flap. Results All the reversed anterolateral thigh adipofascial flaps survived well, with no complications occurred in donor site. Partial graft necrosis occurred in one patient and healed after conser-vative wound dressing change. Conclusion The reversed anterolateral thigh adipofascial flap is a good choice for repair of defects around the knee, for it can provide long thin vascular pedicle and maintain contour of the donor cite.

Objective To evaluate the efficacy of percutaneouse trans-hepatic Cyanoacrylate (TH glue) embolization for gastric varices. Methods TH glue was injected into the gastric varices and its feeder veins in 30 patients. The endoscopy was performed at 1 week and every 3 months after the procedure, while the CT and portal vein angiography were performed at 3 months and every 6 months after the procedure to e-valuate the oblitazation results. Results The effective rate of treatment was 100%. A total of 21 patients were followed up in a mean period of 27.9 months (11-33 months) with a recurrence rate of varices at 14. 29% (3/21). Portal hypertensive gastropathy was observed in 17 patients (80. 95%), and to-bleeding occurred in 2 patients (9. 52%) due to portal hypertensive gastropathy. CT and portal vein angiography dis-played TH glue in fundic peripheral veins, perforating veins in the gastric wall and other feeding veins with-out re-ciroulation or new branches after embolization. Conclusion Peroutaneous trans-hepatic TH glue is a-ble to embolize the gastric varices and its feeding veins, which is feasible and effective in treatment of gastric varices.

OBJECTIVE: To investigate the mechanism. METHOD: We isolate the mouse bone marrow cells and cultured with rGM-CSF and rIL-4 to stimulate bone marrow cells to transfer to immature dendritic cells. And then the immature dendritic cells were costimulated with ILPS and different concentrations of Bimingan Granule. RESULT: MHC II, CD80, CD86 were detected by flow cytometer and TNF-alpha, IL-1beta, IL-6 and IL-10 were quantified by ELISA. CONCLUSION Our results showed that Bimingan Granule may significantly inhibit the differentiation of immature dendritic cells to mature dendritic cells.
Animals ; Cell Differentiation ; drug effects ; Cells, Cultured ; Dendritic Cells ; drug effects ; immunology ; Drugs, Chinese Herbal ; pharmacology ; Mice ; Mice, Inbred C57BL ; Rhinitis, Allergic ; drug therapy ; immunology

Bone-like apatite formation on the surface of calcium phosphate ceramics has been believed to be necessary for new bone to grow on the ceramics and to be related to the osteoinductivity of the material. The research of bone-like apatite formation is a great help to understanding the mechanism of osteoinduction. Synthetic porous calcium phosphate ceramics (HA/TCP = 70/30) were implanted intramuscularly in pigs, dogs, rabbits and rats to make a comparative study of the bone-like apatite formation onto the porous HA/TCP ceramics in different animals. Specimens were harvested at 14 days after implantation. Samples were detected for the surface morphology with SEM. The chemical composition of the sample surface after implantation was analyzed with reflection infrared (R-IR). Obvious bone-like apatite formation could be detected in the sections of porous specimens harvested from all animals after 14 days intramuscular implantation. Crystal deposition could be only observed on the surface of the concave regions of the samples collected from dogs, rabbits and rat. On the contrary, evenly distributed flake-shaped crystal could be found on the pore surface and also on the outer surface of the materials implanted in pigs. The morphology of bone-like apatite in pigs was different from that in the others animals. Bone-like apatite was not observed in dense specimen implanted intramuscularly. Bone-like apatite formed faster on specimens implanted in rabbit than that in other animals. This formation sequence is different from the sequence of osteoinductivity of biphasic calcium phosphate ceramics implanted in these animals. The results demonstrated that the formation of bone-like apatite on materials is a prerequisite condition to their osteoinduction but other factors also play important roles in osteoinduction.
Animals ; Apatites ; chemical synthesis ; Body Fluids ; chemistry ; Bone Substitutes ; chemical synthesis ; chemistry ; Calcium Phosphates ; chemistry ; Ceramics ; chemistry ; Dogs ; Male ; Materials Testing ; Prostheses and Implants ; Rabbits ; Rats ; Swine