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Objective Non-contrast enhanced magnetic resonance angiography ( MRA) has become the focus of research at home and abroad .The aim of the article was to optimize the scan parameters of renal artery with inflow-sensitive inversion recovery ( IF-IR) MRA. Methods 30 cases of renal artery patients into two groups were collected from December 2013 to May 2014 in our hospi-tal.They were divided into stenosis group(n=12) and non-stenosis group(n=48).IFIR-MRA sequences were carried out on each patient by using various BSP-TI with 1200,1300 and 1400 ms, all other parameters were identical .The image signal to noise ratio, a renal artery branch and venous artifact were evaluated by two experienced radiologists , and the best BSP-TI was obtained from different groups. Results BSP-TI=1400 ms was optimal for renal artery stenosis group while 1200 ms was the most suitable for non-stenosis group. Conclusion IFIR-MRA of renal artery can achieve better image quality of renal artery and its branches and it is feasible in clinical routine practice , especially for those patients with renal insufficiency .
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Obiective To discuss the diagnosis value, limitations and mutual complement of MRI and TDUI in the fetus. Methods, TDUI and MRI was performed in 24 cases pregnant women that suspected fetus congenital malformation by Ultrasound examination, the examination results were compared by MR1 and TDUI with the clinical results.Results The 9 cases congenital malformation of 24 cases pregnant women were found by MRI. The 9 cases were confirmed and 3 cases were more sufficient by MRI. The one case examined by MRI was normal other than Ultrasound examination. Conclusion MRI is superior to Ultrasound in diagnosing malformation of nervous system. The Ultrasound and the TDUI in particular is better in finding the surface malformation than MRI. In clinical application, MRI and Ultrasound must be connected to make up the limitation and have a definite diagnosis.
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Objective: To discuss the imaging features of esophageal fistula and the value of intervention.Methods: We retrospectively analyzed the complete clinical data of 12 cases of esophageal fistula treated from June 2000 to May 2008,of whom,2 developed esophago-thoracis fistula and esophago-mediastinum fistula respectively after conservative radiotherapy,and 10 developed esophageal fistula after surgery for esophageal cancer.All the patients received iodine-based oral contrast,spiral CT scanning and intraperitoneal stent implantation for fistula closure.Results: Iodine-based oral contrast showed that the contrast agent overflowed into the chest in 8 cases,into the airway in 3 and into the mediastinum in 1.Spiral CT scanning revealed 8 cases of pleural fistula and 2 cases of remnant stomach-airway fistula,but failed to display the other 2 because of the small size.Intraperitoneal stent implantation was successfully accomplished in all the cases,which helped to close the fistula,take in food,stop bucking,control lung,mediastinum and other infections,and improve the patients' quality of life.Conclusion: Esophageal fistula can be effectively diagnosed based on the findings of iodine-based oral contrast and spiral CT scanning.As a novel technique,intraperitoneal stent implantation for fistula closure,simple,safe and with obvious immediate effect,is well worth promoting.
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Objective:Percutaneous fluoroscopic gastrostomy(PFG) is an alterative method for the patients who were not suitable for percutaneous endoscopic gastrostomy(PEG) and stent.This is a study to report the clinical experience of PFG in 25 patients. Methods:Twenty-five patients could not have oral intake due to obstruction of the oesophagus and depended on long-term parenteral nutrition.They contraindicated for percutaneous endoscopic gastrostomy.Results:The procedures all were successful completed without complication.The patients could use home enteral nutrition and get rid of parenteral nutrition.The patients' quality of life was improved significantly.Conclusion:PFG is a useful,convenient and less complication method for patients who are contraindication for PEG.
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Objective:To study the CT and PET/CT features of pleural mesothelioma and the value of CT and PET/CT imaging in the diagnosis of the disease.Methods:We retrospectively analyzed the spiral CT images of 23 patients and PET/CT images of 7 patients with pleural mesothelioma,all histologically confirmed.Results:Of the 23 cases detected by spiral CT,7 were benign and 16 malignant;local nodular pleural thickening was found in 9 cases,7 benign and 2 malignant;diffuse pleural thickening was observed in 14 cases,all malignant.Of the 7 cases diagnosed by PET/CT,5 were excluded from surgery.Conclusion:CT imaging helps determine the location,shape,extent of the pleural lesion and its relation to the surrounding tissues,while PET/CT is better in the differentiation of pleural mesothelioma and staging of malignancy,and therefore plays an important guiding role in the treatment of the disease.
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Objective To discuss magnetic resonance fat suppression technique,such as Chemical Shift Selective and Short TI Inversion Recovery Sequence,and its clinical value.Methods 73 cases undergoing MRI fat suppression during March 2008 to July 2008 were adopted as the subjects,with such site examined respectively as the skull,basalis,nasopharynx,neck,bones and joints as well as abdominal pelvis.Comparative study of image quality was performed to determine the di-agnostic value of MRI fat suppression technique.Results Of the all cases,7 ones suffered from skull lesions,6 ones from eye diseases,11 ones from abdominal pelvic diseases,4 ones from liver diseases,4 ones from pancreas disorders,and 8 ones from pelvic diseases.Meanwhile,of 10 cases of basalis diseases,there were 8 ones of nasopharyngeal carcinoma and 2 ones of oropharynx disorder.Of 16 cervical disorders,there were 6 ones of neurogenic tumor,3 ones of leucoma,5 ones of metastatic tumor and 2 ones of lipoma.Of 15 cases of vertebral disorders and osteoarthropathia,there were 8 ones of bone contusion,3 ones of metastatic tumor,3 ones of angeioma and 1 case of lipoma.Fat suppression technique,with the lesion edge outlined clearly and the lesions containing adipose tissue identified,provided more information than regular MRI.Conclusion The fat-suppression technique can significantly improve image quality,enhance disease diagnosis rate,and thus is an important technology in MRI examination.