Lung cancer belongs to the highest incidence of malignancy, and the interventional treatment in our country began with bronchial arterial infusion(BAI)with once accounted for a rather fair portion of clinical interventional procedures. But in recent years, the performance of BAI has been declined. This paper attempts to unveil the underling causes and propose our strategy against the problems.

The choice of sequence, scanning delay time, dosage and flow rate of contrast medium, patient's cooperation, and post processing of the images were discussed in this article. Fast, multiphase scanning, and fat saturation were required for the best sequence of contrast-enhanced MRI angiography. The delay time should be determined by bolus test injection, 30 ml contrast medium at 2-3 ml/s flow rate were recommended, good cooperation from the patients and felicitously post processing of the images were also necessary for successful examination.

Basic research in interventional radiology,including transcatheter artery perfusion especially,is progressing slowly due to lack of proper method.Microdialysis technique,a kind of accurate sampling technique in vivo,may help to solve the problem.Just as its name implies,microdialysis means tiny dialysis with advantages of authenticity,exactness and less error.Furthermore it has been applied widely and should be received with great attention and popularity.

In recent years, radiofrequency-ablation with minimal invasive effect has been increasingly used in the treatment of lung cancer, outcoming with obvious achievement. Great progress has been made in the experimental research including creation of electrode needle, the radiofrequency technique and clinical applications. This article overviews the experimental research, clinical application, current status and future research directions of this new treatment modality.

Salivary gland obstruction is a commonly disorder affecting this organ usually due to the development of salivary calculi, ductul srictures, or both. Imaging plays an important role in the diagnosis of the cause, extent, and effects of the obstruction. Up to date, the micro-invasive interventional treatment is always be taken as the first method of choice for dislodgment of calculi and sacculus salivary sialodochoplasty through buccal cavity. This article gives a comprehensive review of the indications and technical procedure.

Implantation of metallic stents is an important method in treatment of airway strictures,and it is applied in increasingly for treating benign tracheobronchial strictures. In this article, we comprehensively introduced the selection of characteristic stents, the current status and progress of stent application in benign tracheobronchial strictures.

Objective To study the effect of low exposing dose on detecting lung nodules by CT . Methods 26 patients with lung metastasis were selected to scan by CT with four kinds of different protocols , including 195 mAs /6.5mm ( exposing dose/scan thickness ) ,195 mAs/3.2 mm,50 mAs/3.2 mm,30 mAs/3.2 mm in all,then the number,size,position of nodules detected with dfferent dose were calculated respectivly.Results The total number of lung nodules detected with 195 mAs/3.2 mm,50 mAs/3.2 mm and 30 mAs/3.2 mm were no significant difference,but when classificated according to their size,as the exposing dose decreased,the number of nodules under 2 mm or 5 mm was detected decreasingly,morever,the noise of image increased.Although the image-noise of 30 mAs/3.2 mm was significant over 195 mAs/6.5 mm,the number of nodules detected by former was significant more than later.Conclusion As a whole, exposing dose decreased,the noise of image increasesd,the quality of image decreases,the artifact may obscure those small lung nodules, however, exposing dose decreased in a certain extent has no significant influence on CT in detecting lung nodules.Low exposing dose combined with thin slice thickness is more superiority than general dose combined with general slice thickness in sifting lung nodule.

Objective To evaluate the effects of percutaneous embolectomy for treament of acute superior mesenteric artery embolism.Methods 34 cases(atrial fibrillation 14 cases;left atrium myxoma 2 cases;SMA thrombosis 15 cases and chronic mesenteric ischemia 3 cases)of acute mesenteric artery embolism were treated with percutaneous embolectomy using long sheath aspiration method and/or thrombolysis via catheterization of the SMA.Results Successful recanalizations were achieved in all of the 34 superior mesenteric arterial embolism including recovery in 31 cases,laparotomy for 2 cases,and 1 died within 24 hours.Conclusions Percutaneous embolectomy using long sheath aspiration is a simple and effective method for treatment of acute superior mesenteric artery embolism.A correct pathogenetie diagnosis is the key to improve the curative effect and avoid the severe complication.(J Intervent Radiol,2005,15:206-208)

Objective To evaluate the clinical effect of interventional therapy in treating intestinal ischemia of mesenteric venous thrombosis.Methods Twelve cases(male 7 cases,female 5 cases;ranging from 33 to 86 years of age)of mesenteric venous thrombosis(MVT)were treated with percutaneous transhepatic mesenteric venous thrombectomy and thrombolysis associated with papaverin perfusion via superior mesenteric artery.Results Seven of the 12 cases recovered;3 cases were undertaken laparotomy;2 died within 30 days respectively.No severe complications occurred in all of the 12 cases.Conclusions Interventional therapy of MVT is a safe and effective method with reduction of the mortality.(J Intervent Radiol,2006,15:202-205)

The evaluation of outcomes of cancer therapy in clinic are largely based on volumetric and morphological evidences.These evidences,however,are very limited in assessing the early effects of therapy.Functional and molecular MR imaging allows co-registration of functional/molecular-based information with high-resolution anatomical detail within the same imaging modality,which makes it possible for assessing the early effects of tumor therapy.