Dissertation > Excellent graduate degree dissertation topics show

The Clinical Application of MR Diffusion-Weighted Imaging for Abdominal Lymph Node

Author: TangWei
Tutor: ZhaoJianNong；ZhangXiaoMing
School: Chongqing Medical University
Course: Medical Imaging and Nuclear Medicine
Keywords: Abdominal lymph node magnetic resonance imaging diffusion-weighted imaging
CLC: R445.2
Type: Master's thesis
Year: 2008
Downloads: 108
Quote: 0
Read: Download Dissertation

Abstract


Objective: To study the feasibility of MR diffusion-weighted imaging(DWI)for abdominal lymph node and its value of differentiation for benign and malignant lymph nodes.Materials and Methods: There were 53 patients in this study performed MRI examination with both conventional sequence (T1WI, T2WI, and dynamic contrast imaging) and MR diffusion-weighted imaging, using a b-value of 0 and 300s/mm2 . Of them 23 patients with both type B hepatitis confirmed by clinical examination and hepatic hilum lymph node enlargement finding on conventional MR images were served as Group hepatitis; and 30 patients with both hepatic carcinoma confirmed or suspected by clinical examination and abdominal lymph node metastasis on conventional MR images were served as Group carcinoma. The image analysis included: (1) the quality of the DW images was categorized as excellent、acceptable、poor three scale in the two groups to rank the quality of DWI for depicting lymph nodes; (2) images depicting enlarged lymph nodes were selected from conventional T2 weighted imaging and diffusion-weighted imaging to calculate the number of enlarged lymph nodes in the two groups, respectively; the ability of two sequence for predicting lymph nodes and the maximum long diameter of visible enlarged lymph nodes on two sequence was compared respectively; (3) the data of diffusion-weighted imaging in group hepatitis and group hepatic carcinoma were transported to AW 4.1 workstation, ADC imaging was reconstructed on workstation. The ADC values of lymph nodes were measured and compared in group hepatitis and group hepatic carcinoma.Results: In group hepatitis, lymph nodes were located in hepatic hilum; while in group hepatic carcinoma, lymph nodes were mainly located in hepatic hilum、port-cavity gap、celiac trunk、abdominal aorta peripheral region. In group hepatitis, the quality of DW images for depicting lymph nodes were rated as excellent 73.9% (17/23), acceptable 26.1% (6/23) and poor 0% (0/23), respectively; in group hepatic carcinoma, they were rated as excellent 70% (21/30), acceptable 23.3% (7/30) and poor 6.7% (2/30), respectively. In 23 patients of group hepatitis, all of 51 lymph nodes depicted were shown on both T2 weighted imaging and DWI imaging; the maximum long diameters were, respectively, 1.14±0.27cm (0.8～1.7cm) and 1.13±0.26cm (0.8～1.6cm) on T2 weighted imaging and DWI imaging (p>0.05). In the 30 patients of group hepatic carcinoma, all the 113 lymph nodes depicted was shown on both T2 weighted imaging and DWI imaging; the maximum long diameters were, respectively, 2.7±0.83cm (1.4～4.4cm) and 2.73±0.85cm (1.5～4.6cm) on T2 weighted imaging and DWI (p>0.05). The lymph nodes with their maximum long diameter more than 0.8cm depicted on T2WI can also be depicted on DWI. The ADC values of lymph nodes were, respectively, 3.92±0.28×10-3mm2/s in group hepatitis and 3.19±0.39×10-3mm2/s and group hepatic carcinoma (t=7.19, p<0.001).Conclusion: MR DWI has an ability to depict abdominal enlarged lymph nodes comparable to that of T2 weighted imaging, and can be an alterative method to differentiate benign from malignant lymph nodes.

Related Dissertations

  1. MRI Guoded Experimental Cryoablation of Rabbit’s Sciatic Nerve for MRI and Pathology Contrast Study,R445.2
  2. The Clinic Value of Diffusion Weighted Whole Body Imaging with Background Body Signal Suppression (DWIBS) Compared with hPET/CT,R445.2
  3. The Value of Diagnosis for Prostate Cancer by Combined Use of MRS and DWI,R737.25
  4. Study of MRI Diffusion-weighted Imaging in the Diagnosis of Lymphadenopathy and Evaluation after Radiotherapy,R445.2
  5. 3.0T BOLD MR techniques on acute unilateral ureteral obstruction of renal damage,R693.2
  6. MR diffusion weighted imaging in Application Value of osteonecrosis,R681.8
  7. To Evaluate the Brain Iron Content by Susceptibility Weighted Imaging: Experimental Study and Clinical Application,R445.2
  8. Value of Real Time Three-Dimensional Echocardiograhy in Patients with Hypertrophic Cardiomyopathy,R542.2
  9. MRI Assessment of Fetal Cerebellar Vermis Development,R714.5
  10. The Applied Value of MR Susceptibility Weighted Imaging in the Diagnosis of Hemorrhagic Cerebral Infarction,R743.3
  11. Parallel Magnetic Resonance Imaging Based on Partial K-Space Data,R445.2
  12. Application of Various Magnetic Resonance Imaging Sequences in Determining the Type of Perianal Abscess and Anal Fistula,R657.1
  13. The Research on Mri of Contrast Agent Nanoparticles C225-USPIO Marker Targeting to the Nasopharyngeal Carcinoma Xenograft in Nude Mice,R739.63
  14. 3D-MRI Investigation on Fetal Surface Malformations Vs.2d-MRI and 3D-US,R714.5
  15. Clincal Application Value of Diffusion Weighted Imaging and Perfusion Weighted Imaging in the Diagnosis of Focal Hepatic Lesions,R735.7
  16. Clinical Effects, Imaging Study and Treatment of TOT Procedure Combined with Modified Pelvic Floor Reconstruction on Female Stress Urinary Incontinence,R699.7
  17. The Research of MRI Measurements on Various Lines and Cross-Sectional Area of Fetal Corpus Callosum,R714.5
  18. The Diagnostic Value of MR T2-mapping in Early Articular Cartilage Injury of Knee,R684
  19. Evaluation of 3T MR Quantitative T1 Perfusion in Differential Diagnosising Human Breast Lesions,R445.2
  20. Clinical Characters and Imaging Features of Left Ventricular Noncompaction in Chinese,R541.1
  21. Ankylosing spondylitis cartilage MRI imaging diagnostic studies,R593.23

CLC: > Medicine, health > Clinical > Diagnostics > Diagnostic Imaging > Magnetic resonance imaging
© 2012 www.DissertationTopic.Net  Mobile