Plug-assisted retrograde transvenous obliteration for the treatment of gastric variceal hemorrhage in patients with liver cirrhosis SUMMARY Objective: To evaluate the feasibility, safety, and clinical outcomes of plug-assisted retrograde transvenous obliteration (PARTO) to treat gastric variceal hemorrhage in patients with portal hypertension. Methods: From 2/2017 to 3/2019, 37 patients (8, with history of gastric variceal hemorrhage; 6, active bleeding; 28, risk rupture; 5, ineffective endoscopic interventions) who underwent PARTO using a vascular plug and a gelfoam pledget were retrospectively analyzed. Conclusion: Plug-assisted retrograde transvenous obliteration is technically and clinically effective for the treatment of gastric varices. Results : Plug-assisted retrograde transvenous obliteration procedures were technically successful in all 37 patients. There are two cases of combining PARTO with downstream intervention through the portal vein. There are 2 cases of drug release outside the blood vessels during the intervention. 100% of cases use only 1 plug, 3 patients use additional coil (due to large shunt diameter). There were no cases of variceal bleeding during the follow-up. Keywords: cirrhosis, gastric varices, Plug-assisted retrograde transvenous obliteration.

Imaging characteristics of sinonasal inverted papilloma on CT Scanner SUMMARY Purpose: Describe characteristics imaging of sinonasal inverted papilloma( SIP) on CT Scanner. Methods: Prospective cohort from July 2018 to July 2019, including 50 patients with histopathology inverted papilloma and CT Scanner standards. Results : 50 patients (34 males and 16 females) with SIP in our study. Patients were a mean of 53,86 years old ( range: from 7 to 90) . SIP location: maxillary sinus (74%), frontal ethmoid sinus (66%), posterior ethmoid sinus (40%), ostiomeatal complex (80%), characteristics imaging of SIP: thin sinonasal wall( 72%), bilobed mass(70%), focal hyperostosis(82%), osteochondroma,(32%). Conclusion: Characteristics imaging on CT Scanner: thin sinonasal wall, bilobed mass, focal hyperostosis, osteochondroma is very valuable in diagnosis SIP. Keywords : Sinonasal inverted papilloma. CT Scanner.

Imaging characteristics and the value of 3 Tesla magnetic resonance imaging in malignant cervical lymphadenopathy SUMMARY Purposes: Describe imaging characteristics and assess value of 3 Tesla magnetic resonance imaging in differentiating benign and malignant cervical nodes. Materials and methods: There are 96 consecutive patients with cervical nodes were undergone a 3 Tesla magnetic resonance exam from 10/2016 to 9/2017 and compared with histopathological results. Results: The average age is 55 years old, and male/female=2/1. Loss of the hilar fat, irregular margins, heterogeneous parenchyma on fat-suppressed T2-weighted images were found in malignant and benign lymph nodes were 74.5% and 4.44%, 72.5% and 4.44%, 88.2% and 4.44%. Diagnosis malignant lymph nodes based on the diameter has got the high valuation with p<0.001. Different size criteria for benign and malignant lymph nodes found that a 11.5 mm size cutoff in the short axis diameter achieved Se 76.5%, Sp 95.6%, Acc 85.4%. In the 67 histologically proven malignant lymphadenopathies, the mean apparent diffusion coefficient (ADC) value was 0.926 ± 0.133 mm2/sec. In the 29 pathologically confirmed benign lymph nodes, an average ADC value of 1.367 ± 0.165 mm2/sec was found. For differentiating between benign versus metastatic lymph nodes, morphological criteria displayed Se 80.0%, Sp 80.0%, Acc 85.4% whereas combined use of morphological criteria on nodal architecture and ADCs yielded Se 98%, Sp 82.2%, Acc 90.6%. Conclusion : 3 Tesla magnetic resonance imaging is a non-invasive effective technique that can provide useful information in diagnosing benign and malignant nodes in the neck.

A study on the role of arterial spin labeling technique (ASL) in the grading of astrocytoma SUMMARY Objective : Assessing the role of perfusion in grading astrocytoma with arterial spin labeling. Studying the value and correlation between relative cerebral blood flow (rCBF) and with the grade of astrocytoma. Method: A descriptive study was carried out at Cho Ray Hospital from March 2017 to June 2018. All MR imaging examinations were performed on a 3 Tesla MR imaging system Skyra (Siemens, Germany). Pulsed ASL technique was acquired for all the patients. For each patient, relative CBF values of the lesions were obtained by dividing the CBF values of tumors to the normal appearing symmetric region on the contralateral hemisphere. The value and correlation between rCBF and the grade of astrocytoma were studied. Result: 19 cases with histopathologically proven gliomas were studied (7 male, 12 female; age range = 21 to 66 years, mean age = 44,16 years). Hide-grade astrocytomas were 78,95% and low-grades were 21,05%. With a cut-off value of 3,095, rCBF predicts high grade astrocytoma with sensitivity of 93,33%, specificity of 100%, PPV of 100%, NPV of 100%, accuracy of 94,74%. rCBF correlated positively with the grade of astrocytoma (r = 0,613, p < 0,01). Conclusion : The rCBF plays an important role in predicting low and high grade astrocytoma. rCBF correlated positively with grade astrocytoma. Keyword : Astrocytoma, relative cerebral blood flow (rCBF), correlation, low and high grade of astrocytoma.

Research into the value of b-mode ultrasound and strain elastography ultrasound in the diagnosis of breast cancer SUMMARY A diagnostic test study was conducted at Bạch Mai hospital to evaluate the efficacy of Ultrasound Strain Elastography in diagnosis of breast masses. Result: 22 patients with 24 lesions were prospectively evaluated by B-mode ultrasound and strain elastography, followed by the core biopsy. The sensitivity, specificity, positive predictive value, negative predictive value, accuracyfor the B-mode Ultrasound were 94.1%, 57.1%, 84.2%, 80%, 83,3%. Elastography combined with B-mode ultrasound improved the value in diagnosis, the sensitivity, specificity, positive predictive value, negative predictive value, accuracywere 100%, 71,4%, 89,4%, 100%, 91,7%. Conclusion : Strain elastography can better diagnose BI-RADS 3 and 4a lesions, especially when combined with B-mode breast ultrasound, which may increase or decrease the BI-RADS level, improvethe accuracy from 83,3% to 91,4%. Key Words: B-mode Ultrasound, Strain Elastography, Breast cancer.

Describsing the features of computed tomography in diagnosting of anastomotic leak SUMMARY Purpose: Describe the features of anastomotic leak on computed tomography (CT). Materials and Methods: Retrospective studies described case series of patients who were diagnosed anastomotic leak at University Medical Center at HCMC and Cho Ray hospital from December 2014 to June 2018, and had CT scan before surgery. The CT features of anastomotic leak were collected. Results: There were 31 patients. Mean age 58, ratio male/female 1,8. Peri-anastomotic gas-fluid collection 58,1 %; density of peri-anastomotic fluid collection varies from 5 HU to 30 HU (mean # 20,3 HU); extraluminal gas in contact with the anastomosis 71,0 %. Only 1 case that has mural discontinuity sign (3,2 %). Intraluminal bowel contrast CT scan was used in 2 cases and both had extravasation (100 %). Conclusion: CT scan is valuable in helping to diagnose anatomotic leak. Two most common and signficant signs in the diagnosis are perianastomotic gas-fluid collection and extra-luminal gas in contact with the anastomosis. Key words: Anastomotic leak, computed tomography findings.

Aexperimentalresearch was performed in radiology center of Bach Mai hospital to evaluate the initial efficacy in the removal of benign breast lesions by vacuum-assisted biopsy SUMMARY Subjects and methods: There is a prospective intervention study in 21 female patients with 31 benign breast lesions with needle aspiration vacuumassisted biopsy under ultrasound guidance from Jan 2018 to Jun 2018. Results : The mean age is 37.5 years old.The 20-30 years old group is most common (19.3%). The average size of the lesions measuring on ultrasound is 11.7mm. The average number of samples is 10.8 with the average time of cutting is 12 minutes. The most common abnormality pathology is breast fibroadenoma (54.8%). Fibrocystic breast disease accounts for 25.8% of all lesions, which is second highest rate. The main complications after biopsy are pain and hematoma. There is a proportional correlation between the size of the lesions and other factors such as the amount of anesthetics used, the volume of the hematoma after the biopsy, the time of wound removal and the size of the biopsy needle. There is a inverse correlation between the distance from the lesion to the nipple and post-biopsy pain. The distance from the lesion to the skin surface is inversely proportional to the size of the post-biopsy hematoma. Conclusion: Vacuum-assisted breast biopsy is an effective and safe method for removal benign breast lesions. This method is also highly aesthetic. The anapathology results based on this method are reliable, especially for small lesions. Key words: Vacuum-asisted biopsy, mammotome, benign breast lesions.

Valuation of 256 - multidetector computer tomographyin detective of Coronary Artery Fistulas and literature review SUMMARY Background: Coronary artery anomalies can be included into anomalies of origin, course, structure and termination. Coronary artery fistula (CAFs) are rare congenital cardiacvascular anomalus with an abnormal connection between coronary artery termination and a great vessel or cardiac chamber. Purpose: The valuation of MDCT 256 – slices findings coronary artery fistula. Material and method: This retrospective cross – sectional study involved 1849 patients underwent 256 - slices coronary computer tomography angiography (CCTA) at the Huu Nghi Viet – Xo hospital between July 2017 and July 2018. We evaluated the quantity and classify of CAFs, the vessel of origin, conduit site, measure of varicose vein, size of aneurysm. We also evaluated the coronary artery attach anomalies. Result : Included in 1849 patients underwent 256 slices CCTA, we determined 17 (0,92%) patients had CAFs (11 men, 6 women; main age 70, age range 54-88 years; 17/17 patients undergoing first time with chest pain). The source of origin of CAFs, 11 (64,7%) patients had two sources. The type of CAFs detected, 15 (88,2%) patients had coronary to pulmonary trunk artery fistula. The CAFs with two sources of origin had most frequency of manifestration for varicose vein and aneurysm. We also findings 6 (35,3%) patients had coronary artery attach anomalies, 4/6 patients had myocardial bringing. Conclusion: The coronary artery fistula are un common congenital cardiac anomalies. Our study dertemined 0,92%, which is higher than the known ratio base on literature review. The most common type of CAFs was coronary to pulmonary trunk artery. Coronary CTA with different rendering menthods had been s useful, noninvasive imaging for the diagnosis of CAFs and other coronary anomalies. Keywords :Coronary artery anomalous, coronary artery fistular, multidetector computer tomography, coronary CT angiography.