Anatomy of hepartic artery on DSA images for treatment HCC by TACE SUMMARY Hepatocellular carcinoma (HCC) is the most common malignant tumor of the liver. This is a leading cause of morbidity and mortality, ranking fi fth for men and eighth for women as a source of primary malignancy. The highest incidences of HCC are found in sub-Saharan Africa and Eastern Asia, Southeastern Asia with incidence rates of 17.43 and 6.77 per 100,000 in men and women of developing countries compared with 8.71 and 2.86 per 100,000 in men and women of developed regions of the world [2],[6]. Although several therapeutic options have been advocated in international lectures, transcatheter arterial chemoembolization (TACE) in particular has been widely performed in the treatment of advantage HCC (nonsurgical patients). Otherwise in surgicalable patients, TACE has important role in presurgical stage. One of the most important factors which affect to TACE results is detection of tumor feeding arteries and nontarget arteries (supply the normal organs). Then, considerations of anatomy and variants of hepatica arterial system on (digital subtraction angiography) DSA images are very important in improvement of TACE effective and avoid complications.

Short-term results of endovascular intervention in the treatment below-the-knee chronic arterial occlusion SUMMARY Purpose : evaluation of short-term results of endovascular intervention in treatment of below-the-knee chronic arterial occlusion. Method and materials: Prospective studies, group of 32 patients with critical limb ischemia due to peripheral arterial diseases were admitted Bach Mai hospital from 9/2011 to 8/2012. The follow up mean times is 6.5 months. Results: 32 patients with 65 arteries were treated by endovascular intervention. Pre-procedure’s ABI is 0.64±0.19. The length of lesion is 171.6 ± 32.5 mm. There is 13.3 % retrograde arterial access at tibial arteries in combination with antergrade access at CFA. Subintimal angioplasty rate is 84.8%. The overall technical success rate is 81.5%. Post-procedure, the along arterial pain is 87.5% with mean duration is 4.5 days, the soft tissue edema rate because of arterial congestion is 30% with mean duration 7.5 days. The fi rst week post-procedure ABI is 0.84±0.22. In the follow up duration, the re-intervention is 9.2%, overall limb salvation is 87.5%. Conclusion : endovascular intervention of arterial chronic occlusion is minimal invasive, safety and effective in revascularization of BTK regions, it has important role in reducing the amputation rate of lower limbs.

Effect and side effect evaluation of CT guided bone biopsy SUMMARY Objective: Study effect and side effect of CT-guided biopsy technique. Patients and method: 35 patients (38 times of biopsy) are biopyed under CT guiding at Radiology department, Bach Mai hospital from October 2011 to July 2012. Results: Successful rate 100%, adequacy 60,5%, complication 2,6%, using small size needle (14 và 13 G) and large size needle (11 và 10G) gots the same adequacy, the specimen >10mm is more effective than specimen <10mm. Conclusion: CT-guided biopsy is safe and effect.

Imaging characteristics and diagnostic value of 18F-FDG PET/CT in post-operative differentiated thyroid cancer patients with elevated serum thyroglobulin and negative 131I whole body scan SUMMARY To evaluate the imaging characteristics and diagnostic value of 18F-FDG PET/CT in post-operative differentiated thyroid cancer (DTC) patients with elevated serum thyroglobulin and negative 131I whole body scan. Materials and method : we performed a cross-sectional descriptive study on 109 post-surgical DTC patients. All patients underwent 18F-FDG PET/CT scan to look for recurrence/metastasis. PET/CT results were compared with hisopathology and clinical follow-up to determine its diagnostic values. Results: 294 lesions were identified in PET/CT with mean diameter and SUV were 14.0 mm và 9.3 g/ml, respectively. Lesions were most found in cervical lymphnode, mediastinum, thyroid bed and lung. PET/CT was positive in 78% of patients with true positive, false positive, true negative and false negative rates were 92.9; 7.1; 75 and 25%; respectively. Sensitivity, specificity and accuracy of PET/CT in detecting recurrent/metastatic DTC were 92.9; 75 and 89%, respectively. SUVmax threshold of 5.9 ng/ml was the most suitable to determine recurrent/metastatic lesions in PET/CT. Conclusions: 18F-FDG PET/CT is a valuable imaging tool to diagnose recurrence/metastasis in DTC patient with elevated serum thyroglobulin and negative 131I whole body scan. Key words: 18F-FDG PET/CT, differentiated thyroid cancer, elevated thyroglobulin, negative131I whole body scan.

The initial result of vascular interventional application with angio ct in vinmec times city SUMMARY Purpose : Evaluating the initial result of vascular interventional application with Angio-CT hybrid system in Vinmec Times City radiology department. Material and Method : From Nov 2018 to May 2019, we applied vascular intervention for 93 patients including TACE, SIRT for HCC; intraarterial chemotherapy for retinoblastoma; cerebral vascular intervention, bleeding GI intervention; uterine fibroid embolization and benign prostatic hypertrophy embolization, bronchial artery embolization… Result and discussion : Angio-CT hybrid system save time move patient between from CT rom to vascular intervention room, high-contrast resolution, large FOV, minimal artefacts due to motion or metals. Conclusion: Angio-CT hybrid system application in vascular interventional help us diagnosis and quickly make a vascular interventional decision, improve many techniques, increase accuracy and confidence when deciding to intervene, limit unwanted complications due to limitations on observation on DSA alone. Key words: Angio CT hybrid system, Angio CT in vascular interventional application.

The 128 MSCT imaging differentiations of retroperitoneal extra-renal masses in children SUMMARY Perpose : Find out the differrentiation of 128 MSCT characteristics of retroperitoneal extra-renal mass in children Material and methods : we had 128 MSCT images of 67 children patients in National Children’s hospital from January 2018 to April 2019 with pathologically proven of the retroperitoneal extra-renal masses. The patients was divided into 9 groups: neuroblastoma and ganglioneuroblastoma (n=42), Adrenal non-tumorigentic masses (n = 8 ), teratoma (n = 8), ganglioneuroma (n = 3), hemangioma (n = 1), neurofibroma (n = 1), rhadomyosarcoma (n = 1), undifferentiated pleomorphic sarcoma (n=1), pheochromocytoma (n = 1), york sac tumor (n = 1). We retrospectively reviewed the CT images of 67 children patients to find out the imaging differrentiation compared the enhancement level variations between groups and the enhancing of masses with muscle, liver, spleen. Results: Age of all groups is from 3 days to 11 years, the age of adrenal non-tumorigentic masses is lowest. No statitistically significant different between male and female in retro-peritoneal extra-renal masses. Diameter of adrenal non-tumorigenntic group is smallest. Neuroblastomas, teratomas, geminoma and sarcoma are usually large. Encasement of vessel, calcification, abdominal lymph nodes and far metastasis findings are common signs in neuroblastoma and ganglioneuroblastoma group. Fatty and calcified CT findings are common in teratoma group. There are statitistically significant different enhancement level variation between groups. If the enhancing of the masses was lower than the muscle, these are usually benign. If the enhancement of the masses was higher than the muscle and lower than spleen, it can be benign or malignant, neuroblastoma is very common in this level. Hemangioma enhancement is higher than spleen. Conclusions: There are differrentiations of 128 MSCT characteristics of retro-peritoneal extra-renal masses in children. Keywords: retro-peritoneal extra-renal masses, multiple slices computer tomography (MSCT).

An initial study on the role of 320 detector row CT in Myocardial Perfusion evaluation SUMMARY Objective: To study the role of 320 detector row CT in myocardial perfusion evaluation . Material and Methods: A prospective and descriptive study was carried out on 12 patient with moderate or highly moderate risk of coronary artery diseases from December 2018 to May 2019 at Central Military Hospital 108. Results: 10 male and 2 female, the average age was 63,2. 91.7% of the patients had myocardial ischemia with tranmural perfusion ratio (TPR) ≤ 0,99. The number of coronary arteries had perfusion abnormalities accounted for 38.9%. The diagnostic accuracy increased after perfusion analysis with sensitivity from 83.3% to 91.7% and specificity from 75.0% to 91.7%.\ Conclusion: 320 detector row CT is an effective method to perform both coronary CT angiography and CT perfusion imaging in the same examination . Now we are continuing to collect and study on more patients. Keywords: Myocardial perfusion, tranmural perfusion ratio, computed tomography.

Computed tomography features of lung cancer patients before tyrosine kinase inhibitor treatment and response assessment by recist 1.1 SUMMARY Objective: 1. Describe computed tomography features of non-small cell lung cancer before tyrosine kinase inhibitor treatment. 2. Treament response assessment by RECIST 1.1. Patients and metho d: Cross-sectional, retrospective and prospective study of 36 non- small cell lung cancer patients, EGFR mutations positive, treated with Tyrosine Kinase Inhibitor from 08/2018 to 06/2018, having Computed Tomography image after 3 and 6 months treament. Results: Tumors located mainly in peripheral of the lung (77,8%). The most common position is the right upper lobe (30,5%), the least common position is the right middle lobe (5,6%). There are 83,3% of tumors with the size over 3cm. 100% of tumor have irregular and spicules magin. Solid mass accounted for 63,9%, partly solid mass (33,3%), one tumor is cavity form. Medium attenuation value is 27 HU in pre-contrast and 57,1 HU in post-contrast CT scan. Lymph node metastasis in 27 (61%) patients. Lymph node metastasis is mainly occured in paratracheal nodes [2,4(R,L), 3] (48%), A-Pwindow, paraaortic nodes (5,6) (12%), subcarinal nodes (7) (16%), supraclavicular nodes (1) (20%). After 3 months treament, partial response: 17 patients (52,8%), stable disease: 19 patients (47,2%). After 6 months treament, partial response: 14 patients (38,9%), stable disease: 20 patients (55,6%), progressive disease: 2 patients (5,5%). Conclusion: Computed TomographyFeatures can be used to diagnose lung cancer. 2. Tyrosine Kinase Inhibitor Treatment is effective inadvancednonsmall cell lung cancer. Keywords: lung cancer, computed tomography, tyrosine kinase inhibitor treatment, Recist 1.1