• Thứ 2, 15/08/2022
  • (GMT+7)
Nghiên cứu vai trò của kỹ thuật dán nhãn spin động mạch (ASL) trong phân độ mô học u sao bào

Nghiên cứu vai trò của kỹ thuật dán nhãn spin động mạch (ASL) trong phân độ mô học u sao bào

04/12/2019 20:37:43 | 0 binh luận

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.
MSCT - 640 trong đánh giá van tim nhân tạo: Bước đầu khảo sát 36 vạn

MSCT - 640 trong đánh giá van tim nhân tạo: Bước đầu khảo sát 36 vạn

14/04/2020 22:48:29 | 0 binh luận

Prosthetic heart valve assessment with 640-Slice MSCT: Initial Experience with 36 Prosthetic heart valv es SUMMARY Objectives: Multislice CT(MSCT) has shown potential for prosthetic heart valve (PHV) assessment. We assessed the image quality of different PHV types to determine which PHV are suitable for MSCT evaluation and accuracy of 640-Slice MSCT for PHV dysfunction assessment. Subjects and methods: Cardiac 640- Slice MSCT examinations performed at the Medic medical center since 6/2013 to12/2016 were reviewed for the presence of PHVs. Image quality of the supravalvular, perivalvular, subvalvular and valvular regions was scored on a four-point scale (1=non-diagnostic, 2= moderate, 3=good and 4=excellent). Causes of PHV dysfunction were confirmed by surgery. Results : 28 patients with a total of 36 PHVs (4 monoleaflets, 25 bileaflets and 7 biological PHVs) in the aortic(n=22), mitral(n=14) position were included. Median image quality scores for the supra-,peri-and subvalvular regions and valvular detail were 4, 3.7, 3.7 and 3.5, respectively for bileaflet PHVs; 3, 2.6, 2.5 and 1.6, respectively for monoleaflet PHVs and 4, 3.8, 4.0 and 3.7 respectively for biological PHVs. In 3/4(75%) monoleaflet valves with severe artefacts and non - assessment. In 22(17 bileaflets and 5 biological PHVs ) of the 32 PHVs(68,75%) detect PHV dysfunction. In the PHV dysfunction group, the mechanism of dysfunction (pannus, thrombosis , patient prosthesis mismatch , paravalvular leakage, endocarditis and degenerate) was correctly identified by surgery in 100% of the cases. Conclusion : Implanted bileaflet and biological PHVs have good image quality on 640-Slice MSCT and are suitable for 640-Slice MSCT evaluation. Causes of PHV dysfunction were correctly evaluated by 640-slice MSCT in all PHVs except for monoleaflet PHVs.
Bước đầu nghiên cứu đặc điểm hình ảnh chuyển hóa 18-FDG PET/CT não ở bệnh nhi tự kỷ

Bước đầu nghiên cứu đặc điểm hình ảnh chuyển hóa 18-FDG PET/CT não ở bệnh nhi tự kỷ

15/04/2020 20:33:18 | 0 binh luận

Preliminary evaluation of F-18 FDG PET findings in pediatric patients with autism SUMMARY Objectives: the purpose of this study was to evaluate F-18 FDG Positron Emission Tomography (PET) findings in pediatric patients with autism. Subjects and methods: This study includes 15 autism pediatric patients who were diagnosed at the Vinmec international hospital from January 2017 to May 2017 and five oncology patients without neurology’s diseases underwent to whole body PET scan (from vertex to midthigh) were selected as control group. All patients underwent PET/CT brain examination in Nuclear Medicine Department, 108 Central Military Hospital. Results: Mean patient age (7.1 ± 0.24). On the PET scans of the 15 patients with autism, 13 (86%) had significantly decreased metabolic activity of both hemispheres. All of the patients had decreased metabolism in temporal, parietal and cingulate gyrus. Mean of Z-scores of autism group showed significantly decreased activity in comparison with Z-score of the control group. There were relations between clinical and grade of hypometabolism of autism. Conclusions : hypometabolism in the brain of autism pediatric patients may present a role in diagnosis and prognosis. Key words : autism pediatric patients, hypometabolism in the brain
Đặc điểm hình ảnh cộng hưởng từ động học tổng phân ở nhóm bệnh nhân nữ rối loạn chức năng sàn chậu trên 60 tuổi

Đặc điểm hình ảnh cộng hưởng từ động học tổng phân ở nhóm bệnh nhân nữ rối loạn chức năng sàn chậu trên 60 tuổi

14/04/2020 23:27:30 | 0 binh luận

Magnetic Resonance Defecography in female patients with pelvic floor dysfunction age from 60 SUMMARY Objective: We describe characteristics dynamic MR defecography in female patients with pelvic floor dysfunction, age from 60. Methods Describing cross-study. 106 patients were indicated magnetic resonance defecography by coloproctologist from 09/2016 to 04/2017, at Thong Nhat Hospital, Ho Chi Minh City. Results Defecatory dysfunction is the most common symptom (83,1%). The prevalence of urinary incontinence and pain is 34% and 59,4%, respectively. There is a significant difference in the ratio of pelvic floor descent between the groups who have and no have children. The ratio of pelvic floor descent of the group who have 1-2 children is significantly greater than the group have more than 3 children. The correlation between age and the degree of pelvic floor descent is weak. The combination of pelvic organ prolapses usually occurs. If there is only one pelvic compartment prolapse, it is the posterior compartment prolapse, which counts for only 5,6%. The degree of all the rectoceles is from the second degree and 83,1% of this still contain ultrasound gel after defecation phase. The prevalence of Anismus is only 3/106 and none of this combine with retocele. Conclusions Age, menopause and childbirth all have influence on the weakness of pelvic floor. In the older group, the combination of pelvic floor organ prolapses usually occurs. Rectocele is also common while Anismus is a uncommon condition. Keywords : MR defecography, pelvic floor dysfunction, female age from 60, rectocele, Anismus.
Đặc điểm hình ảnh và kết quả nút mạch cầm máu cấp cứu ung thư biểu mô tế bào gan vỡ

Đặc điểm hình ảnh và kết quả nút mạch cầm máu cấp cứu ung thư biểu mô tế bào gan vỡ

14/04/2020 23:15:45 | 0 binh luận

Evaluate the imaging characteristics of ruptured hepatocellular carcinoma and the effectiveness of embolization for controlling hemorrhage SUMMARY Objecivets: Evaluate the imaging characteristics of hepatocellular carcinoma (HCC) ruptured and the effectiveness of transcatheter arterial embolization for controlling hemorrhage. Subjects and methods : analyze retrospectively the outcomes of 22 patients who underwent abdominal CTscanner and urgent transarterial embolization for spontaneous ruptured HCC during the period from 01/2014 to 06/2016 in Viet Duc hospital. Results: Mean tumor size: 83.95mm (longest diameter). 7/22 patients (31.8%) exhibited contrast extravasation on angiography, 2/22 patients (9.1%) exhibited pseudoaneurysm, one patient (4.6%) showed arterioportal shunt, 12/22 (54.5%) showed no vascular injury. The embolization materials we used mostly was Spongel in 18/22 patients (81.8%), histoacryl 4/22 (18.2%). The success rate of embolization in on angiography is 22/22 (100%).1 patient die in one months after the procedure due to liver failure. Conclusion: Large tumors are likely to rupture and active bleeding injuries are uncommon. Transarterial embolization is a safe and effective method for controlling spontaneous rupture of HCC. Key words: angiography, embolization, hepatocellular carcinoma, large tumors spontaneous rupture.
Rách dây chằng chéo sau: Hình ảnh và giá trị của cộng hưởng từ trước phẫu thuật

Rách dây chằng chéo sau: Hình ảnh và giá trị của cộng hưởng từ trước phẫu thuật

14/04/2020 23:02:34 | 0 binh luận

Posterior cruciate ligament injury: evaluation with preoperative mr imaging SUMMARY Objective: The purpose of the present study was to evaluate the imaging characteristics and the value of preoperative MRI in posterior cruciate ligament (PCL) tears. Material and methods: Between January 2015 and December 2016, 48 patients with a postoperative diagnosis of PCL tear and available MR images of the knee were involved in a descriptive crosssectional study. Imaging characteristics of PCL tears and associated injuries were described and compared with operative report. Results : PCL average diameter was 7,6 ± 2,1 mm, a statistically significant difference was found between PCL thickness < 7mm group and those of ³ 7mm group. Intrasubstance fluid signal intensity of PCL was detected in 79,2% of cases. Anterior cruciate ligament tears commonly associated with PCL tears (64,6%) in multiple ligament injuries. MRI has sensitivity, specificity of 89% and 86% respectively in detection complete PCL tears. Conclusion : MRI provides accurate diagnostic of PCL tear preoperatively, intrasubstance fluid signal intensity, anteroposterior diameter ³ 7mm can be considered evidence of a torn PCL with a high degree of certainly. Keywords : posterior cruciate ligament (PCL) tears, posterior cruciate ligament injury, preoperative MR imaging.
Vai trò của X-quang cắt lớp vi tính trong chẩn đoán tụ dịch ổ bụng sau mổ

Vai trò của X-quang cắt lớp vi tính trong chẩn đoán tụ dịch ổ bụng sau mổ

14/04/2020 22:57:40 | 0 binh luận

Roles of computed tomography in diagnosis of postoperative abdominal fluid collections SUMMARY Objectives: The purpose of this study was to determine whether the separate computed tomographic imaging features or their combination with clinical and laboratory parameters could distinguish infected from noninfected abdominal fluid collections after surgery. Materials and Methods: The cross-sectional descriptive study included 68 consecutive patients who underwent portal venous phase CT on 64 and 128 multidetector CT at the University Medical Center HCMC from 01/2014 to 03/2017. Imaging findings included attenuation (Hounsfield unit – HU), entrapped gas, wall enhancement and thickness, fat stranding, and volume of fluid collections. Clinical and laboratory parameters included diabetes and C-reactive protein. The standard of reference for the presence of infection was microbiological Gram stain and culture of fluid samples. A scoring system from 1 to 10 included diabetes: 2 points; CRP ≥ 100mg/L: 1 points; attenuation of fluid collections ≥ 20HU: 4 points; entrapped gas: 3 points. Results : CT imaging features (attenuation of fluid collections, entrapped gas) was significantly associated with the presence of infection. Sensitivities of these features varied between 56.5-87%, specificities between 68.2-81.8%, LR(+) 2.74-3.1, LR(-) 0.19-0.53. Multiple logistic regression analysis revealed attenuation of fluid collections and entrapped gas as significant independent predictors of infection (p<0.01), consecutive OR were 166.1 (95% confedence interval [CI], 7.52-3670) and 14.77 (95% CI, 1.44- 392.78). Based on using the CT-clinical-laboratory scoring system, scores of 3 or lower had a 100% negative predictive value, scores of 6 or higher had an 86,8% positive predictive value and scores of 7 or higher had a 96,7% positive predictive value for diagnosing infected fluid collections. Receiver operating characteristic analysis revealed an area under the curve of 0.86 (95% CI, 0.77- 0.94) for the score. Conclusion : Based on computed tomographic imaging features alone for distinguishing infected from noninfected abdominal fluid collections is still limited. CT had a low capability to confirm and could not be used to rule out the presence of infection. The application of the CT-clinical-laboratory scoring system may improve the ability to predict infected fluid collections after abdominal surgery. Key Words : postoperative, abdominal cavity, fluid collections, abscess, computed tomography (CT).
Giá trị của chụp cắt lớp vi tính nhiều đầu dò trong đánh giá xâm lấn mạch máu của ung thư biểu mô tuyến tụy trước phẫu thuật

Giá trị của chụp cắt lớp vi tính nhiều đầu dò trong đánh giá xâm lấn mạch máu của ung thư biểu mô tuyến tụy trước phẫu thuật

14/04/2020 22:41:37 | 0 binh luận

Value of multidetector ct in preoperative assessment of the vascular invasion in pancreatic adenocarcinoma SUMMARY Object: The purpose of this study is to assess the accuracy of multidetector computed tomography (MDCT) in preoperative determination of the vascular invasion in pancreatic adenocarcinoma. Materials and methods: Multidetector computed tomography, surgery, and pathological results of 39 patients with pancreatic adenocarcinoma were evaluated retrospectively. MDCT findings were compared with surgical findings to determine the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of MDCT in determining the vascular invasion. Results: 39 patients (21 males, mean age: 58,8 years) underwent surgery. The sensitivity, specificity, PPV, NPV, and accuracy of MDCT in determining the vascular invasion of pancreatic adenocarcinomas were 88,9%, 96,9%, 86,5%, 97,5% and 95,9% respectively. Conclusion: The accuracy of MDCT is high in preoperative determination of the vascular invasion in pancreatic adenocarcinoma. Keywords: pancreatic adenocarcinoma, multidetector computed tomography, vascular invasion

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