1.Assessment of lung volume using multi-slice spiral CT and comparison with pulmonary function test
Journal of Third Military Medical University 2003;0(09):-
Objective To explore the value of multi-slice spiral CT (MSCT) with three dimensional (3D) postprocessing for assessing the lung volume and compare it with pulmonary function test (PFT). Methods In 60 cases, there were 34 healthy controls and 26 patients with emphysema. CT scan and PFT were performed within 3 d in all case. The total lung was respectively scanned at the end of full inspiration and full expiration, using GE Lightspeed 16 slices spiral CT. The total lung volumes and voxel index (VI) at threshold range of -1023 Hu to -900 Hu were measured by pulmonary quantitative software of AW4.2 workstation. Results The full expiration volume(Vex) significantly correlated with residual volume(RV) (r=0.908) as well as the full inspiration volume (Vin) with total lung capacity (TLC) (r=0.897). The value of (Vin-Vex) well correlated with forced vital capacity(FVC), as well as Vex/Vin with RV/TLC, VI Ain with TLC, VI Aex with RV. Conclusion Significant correlation of lung volume accessed by MSCT with 3D technique with PFT is useful for assessing the pulmonary function.
2.CT Guided Puncture Aspiration and Sclerosing Treatrment of hepatic and Renal Cysts
Liguang ZOU ; Yong PENG ; Ken CHEN
Journal of Interventional Radiology 1994;0(02):-
Purpose: To summarize the efficiency and the experience of the puncture aspiration and sclerosing therapy of hepatic and renal cysts. Materials and methods: 27 patients were treated with percutaneous aspiration and alcohol injection of the cystic cavity using 20G Greene needles. Among the 27 patients, 11 were with hepatic cyst, 15 with renal cyst, and 1 with polycystic kidneys. The size of cysts ranged from 3.5 to 12 cm, and the amount of aspirated fluid varied from 21 to 550ml. Pure alcohol (99. 7%) was injected into the cavities after apiration. Results: All the puncture procedures were successful, and no major complications occurred, The clinical symptoms were relieved or disappeared after the treatment. 18 cases were followed for 3 months to 5 years. The efficient indices: Grade I one case (polycystic kidneys), Grade Ⅱ 4 cases and Grade Ⅲ 13 cases. Conclusion: CT guided percutaneous puncture aspiration and sclerosing treatment of hepatic and renal cysts can be considered as an effective alternative to surgical treatment. The simple aspiration of polycystic kidneys is very helpful in relieving symptoms and improving renal functions.
3.Angiographic diagnosis of the carotid artery pseudoaneurysm
Yueyong QIN ; Liguang ZOU ; Shuhua DAI
Journal of Interventional Radiology 2001;0(05):-
Objective To create a further understanding of the angiographic features of the carotid artery pseudoaneurysm (CAPA) and to explore the clinical diagnostic value of angiography.Methods Sixteen cases of CAPA with clinical and angiographic data were analyzed retrospectively. The angiographic appearances in all of the patients were observed dynamically and precisely with a double blind method by two experienced radiologists together and formed a consensus interpretation. Results Angiography provided a definite diagnosis for all cases. The parent arteries included the common carotid artery (1 case), common carotid artery bifurcation (9 cases), internal carotid artery (5 cases) and external carotid artery (1 case). The angiographic features of the CAPA were: All cases showed the contrast media retension in the aneuysms; turblulent flow within aneurysm in 9 cases; the “jetting sign” at the leak of the parent artery in 7 cases; increase angulation of the bifurcation of internal and external carotid arteries in 12 cases.Conclusions Angiography is the most valuable examination method in diagnosis of CAPA, and it can not only provide definite diagnosis, but also play an important role in selection of therapeutic plan.
4.Angiographic diagnosis and interventional therapy for Takayasu arteritis
Yueyong QI ; Liguang ZOU ; Qingrong SUN
Journal of Interventional Radiology 2001;0(06):-
Objective To explore the value of angiographic diagnosis and interventional therapy for Takayasu arteritis. Methods Thirty-eight patients with Takayasu Arteritis (TA)(11 men, 27 woman; aged 8-54; average age, 30.5?18) undergone angiography were analyzed retrospectively. The angiographic appearances in all of the patients were observed dynamically in a double blind method by two experienced radiologists together and formed a consensus interpretation. Results According to the classification of Lupi-Herrea, typeⅠwas found in 11 cases, typeⅡin 15, typeⅢin 7 and typeⅣin 5 by angiography. Among 38 patients the arterial involvement ineluded subclavian artery in 20 cases (52.6%), the abdominal aorta in 15 cases (39.5%), the renal artery in 14 cases (36.8%), thoracic aorta in 10 cases (26.3%), carotid artery in 9 cases (23.7%), iliac artery in 9 cases (23.7%), axillary artery in 7 cases (18.4%), superior mesenteric artery in 4 cases (10.5%), coronary artery in 3 cases (7.9%), pulmonary artery in 3 cases (7.9%), and so on. Percutaneous transluminal angioplasty was performed in 22 cases and the stent placement was managed in 12 cases successfully. Conclusions Angiography is one of the ideal and reliable methods for the diagnosis and guidance of the interventional treatment for TA, and the latter is a mini-invasive and effective way for TA.
5.Evaluation of Radiologic Diagnosis on Complications after Kidney Transplantation
Yueyong QI ; Qingrong SUN ; Liguang ZOU
Journal of Chinese Physician 2000;0(11):-
Objective To explore the value of imaging diagnosis on complications after kidney transplantation. Methods The radiologic appearances of 165 patients with postoperative complications were reviewed in a double blind method by two experienced radiologists. Results In the 158 patients with postoperative pulmonary infections, the main etiological causes according to their frequency were bacteria,fungus,virus,and so on. The postoperative pulmonary infections of the patients with renal transplantation were diagnosed as normal(28,17 7%),increased lung markings(44,27 8%) and pulmonary infection(84,53 2%) by chest X-rays and CT. The renal artery stenosis after kidney transplantation was diagnosed in 5 cases, and thrombosis of pancreas blood vessel after operation of simultaneous pancreas-kidney transplantation was diagnosed in 1 case by DSA. Conclusions Radiography and CT scan are very useful in the clinical diagnosis of postoperative pulmonary infections in the patients with renal transplantation,and radiography should be the first choice for the imaging diagnosis. DSA is one of the ideal and reliable measns to diagnose the postoperative vascular complications in kidney transplant recipients.
6.Application of Multimedia Courseware in Teaching of Medical Imaging Technology
Yueyong QI ; Liguang ZOU ; Daoyou XI ; Xiangchen CHENG
Chinese Medical Equipment Journal 2003;0(10):-
This paper discusses the conception of multimedia courseware in the teaching of medical imaging technology, and meaning, features and requirements. It is concluded multimedia courseware can play an important role in the teaching of medical imaging technology. Also, some problems existing in the application are analysed in this article.
7.Double chemoembolization of hepatic carcinoma by TACE and portal vein PCS
Liguang ZOU ; Ken CHEN ; Yueyong QI ; Jing MA ;
Journal of Third Military Medical University 2003;0(16):-
Objective To study the method and efficacy of double chemoembolization of hepatic carcinoma by transcatheter arterial cheomembolization (TACE) and portal vein port catheter system (PCS). Methods PCS was implanted in portal vein in 17 cases of irresectable primary hepatocellular cancer (HCC) during operation. One month later, chemoembolization of portal vein via PCS was performed, meanwhile TACE was also done (hepatic arterial portable vein chemoembolization, HA PVCE). A total of 120 cases of HCC treated simply with TACE were served as the control. Results The technical success rate was 100% in both TACE and portal vein PCS. Hepatic arteriography showed rich or moderate blood supply of HCC in 134 cases and PCS portography showed tumor staining in 6 cases. In groups of HA PVCE and TACE, the positive alpha fetoprotein (AFP) level decreased in 80% and 71.6% cases; half a year survival rate was 85.7% and 74.4%, and one year survival rate was 71.4% and 52.4%, respectively. Conclusion Double chemoembolization by TACE and portal vein PCS is a safe procedure with high technique success rate and therapeutic efficacy for irresectable hepatic carcinoma.
8.Reflection on the implementation of continuing medical education by using both domestic and foreign medical imaging websites
Song ZHANG ; Li CHEN ; Qichuan ZHANG ; Ping LIU ; Liguang ZOU
Chinese Journal of Medical Education Research 2017;16(3):310-313
With the development of computer network technology,network teaching has become an important mode of continuing medical education.There are many kinds of medical imaging websites from both domestic and foreign.In general,they can be divided into three main categories,in terms of society official websites,academic journal websites,and educational resource websites.On the basis of the introduction of the representative domestic and international medical imaging websites,this paper analyzes the advantages and disadvantages of them,and emphasizes some measures to improve the application value of them in continuing medical education,including to establish an authoritative academic website to achieve continuing medical education credits,to strengthen the resources and function of various medical image sites,and to promote intelligent and personalized self-learning,etc.We hope the combination of medical imaging websites with continuing medical education will be much closer,so as to provide a good platform for imaging personnel to improve their professional level and scientific research ability.
9.Establishing models of portal vein occlusion and value of multi-slice CT in the evaluation of hepatic VX2 tumor in rabbits
Yueyong QI ; Liguang ZOU ; Shuhua DAI ; Ping LIANG ; Xiaobing HUANG
Chinese Journal of Tissue Engineering Research 2006;10(48):219-221,225
BACKGROUND: Clinical researches found that portal vein occlusion was beneficial to inhibit growth of hepatocarcinoma, promote compensatory hyperplasia of un-blocking hepatic tissue and decrease metastasis of portal vein occlusion; however, it should be fu~her proved by animal experiments.OBJECTIVE: To investigate models of portal vein occlusion of hepatic VX2 tumor in rabbits and evaluate value of multi-slice CT.DESIGN: Randomized grouping design and animal study.SETTING: Department of Radiology, Xinqiao Hospital of the Third Military Medical University of Chinese PLA.MATERIALS: The experiment was carried out in the Imaging Department of Xinqiao Hospital of the Third Military Medical University of Chinese PLA from July 2002 to January 2005. Forty New Zealand rabbits were divided according to digital table into 4 groups: immediate group (transplantation of tumor after immediate portal vein occlusion), 3-week group (transplantation of tumor at 3 weeks after portal vein occlusion), negative control group and positive control group, 10 in each group.METHODS: Hepatic VX2 tumor was transplanted with abdominal-embedding innoculation at immediate portal vein occlusion and 3 weeks after portal vein occlusion. Meanwhile, they were divided into negative control group (Left external branch of portal vein was done sham-operative block,and left exite was embedded and inoculated pseudoly) and positive control group (Transplanted tumor did not suffer from portal vein occlusion). All rabbits were scanned with multi-slice CT.MAIN OUTCOME MEASURES: General changes of liver, changes of tumor, metastasis of tumor, vascular-imaging displaying rate of multi-slice CT of hepatic artery and portal vein, blood flow of liver, blood volume,mean transit time, permeability of vascular surface and fraction of hepatic arterial infusion (HAI).RESULTS: All 40 animals were involved in the final analysis. ① Tumor did not grow in both immediate group and 3-week group. In 3-week group,left endite was atrophied and growth of tumor was inhibited. The maximal diameter of tumor was smaller than that in positive control group [(2.55 ±0.46), (3.59±0.37) cm, t=5.57, P < 0.001]. Incidences of metastasis in liver and lung were lower in 3-week group than those in positive control group (10%, 40%; 100%, 90%); however, there was no significant difference. ② Scanning with multi-slice CT, displaying rate of branches hepatic artery was lower in grade Ⅲ than that in grade Ⅰ and Ⅱ (40%, 70%,100%, P < 0.05); but there was no significant difference of displaying rate of portal vein at various grades (P > 0.05). ③ Values of blood flow of liver,blood volume, mean transit time and permeability of vascular surface were lower in immediate group and 3-week group than those in control groups,but values of HAI were increased.CONCLUSION: Ligating left external branch of portal vein is an ideal way to establish models of portal vein occlusion of hepatic VX2 tumor in rabbits; furthermore, multi-slice CT plays a key role in evaluating effect of portal vein occlusion.
10.Correlation of CT perfusion imaging of rat breast cancer with tumor pathological grade and microvascular density
Hui ZHANG ; Liguang ZOU ; Xin PANG ; Song ZHANG ; Cuiwei LIAO
Journal of Third Military Medical University 2003;0(11):-
Objective To study the correlation of CT perfusion imaging ( CTPI) of induced rat breast cancer with tumor pathological grade and microvascular density ( MVD) ,and the diagnostic value of CTPI for breast cancer. Methods Breast cancer was induced in 35 Wister male rats with intragastric 7,12-dimethyl-1,2-benzanthracene ( DMBA) treatment. Routine breast CT scanning and CTPI were performed. After processed at a workstation,CTPI parameters were obtained including blood flow ( BF) ,blood volume ( BV) ,mean transit time ( MTT) ,permeability surface ( PS) ,and time density curve ( TDC). The rats were sacrificed and breast tumor tisue samples were collected. Breast tumor tisue samples were stained with HE and factor Ⅷ-related antigen immunohistochemistry to observe the pathological type and MVD of tumor. Results Breast tumor was successfully induced in 30 rats ( including 8 with breast hyperplasia and 22 with breast cancer). The BF and BV were higher in rats with breast cancer than in those with breast hyperplasia 151. 72 ? 93. 43 vs 42. 96 ? 32. 42 ml/( min.100 g) ,9. 55 ? 7. 88 vs 2. 17 ? 1. 36 ml/100 g,P 0. 05). The positive correlation of MVD with BF,BV and PS was increased with the decreased tumor differentiation with a correlation coefficient of 0. 701,0. 441 and 0. 521,respectively ( P