Dissertation > Excellent graduate degree dissertation topics show

The Clinical Study of128-slice Spiral CT Low Tube Voltage to Reduce the Radiation Dose in Head Digital Subtraction CT Angiography

Author: XieXiaoYu
Tutor: TangGuangCai
School: Luzhou Medical College
Course: Medical Imaging and Nuclear Medicine
Keywords: Computed tomography Low tube voltage CT angiography Radiation dose
CLC: R816.1
Type: Master's thesis
Year: 2013
Downloads: 31
Quote: 0
Read: Download Dissertation


Objective: The objective is to evaluate the clinical applicationof the feasibility and value of low tube voltage to reduce the radiation dose bycomparing and analyzing the impact of the low tube voltage(80kV,100kV)withconventional tube voltage (120kV) of the radiation dose and image quality inhead digital subtraction CT angiography (DS-CTA)Methods: All adult patients from2012October to2013March, total of57cases (31male,26females,aged37-85years old:average age is62.4years old)who required head DC-CTA in our hospital,are prospectively selected in ourstudy. The patients are enrolled randomly assigned according to the principle ofdifferent tube voltage group, namely A (80kV), B (100kV), C (120kV),whichare19cases in A group,20cases in B group and C group of18cases.All arebased on the same scanning parameters substantially,we compare and analyzethe radiation dose of three groups of different tube voltage,including CT doseindex (CTDIvol),the dose-length product (DLP), the effective dose (ED),quantitative and qualitative analysis of image quality,For quantitative analysis,itcontains vascular signal intensity(SI), signal-to-noise ratio (SNR) andcontrast-to-noise ratio (CNR);Qualitative analysis is done by two experiencedradiologists using a5evaluation method blinded independent evaluation of theoriginal image,two-dimensional,three-dimensional image quality. We usestatistical analysis:evaluation of single-factor analysis of variance among thethree groups of image radiation dose and CT values,image noise,CNR,SNR difference;using nonparametric rank sum test to compare the images as thesubjective score difference between three groups;Kappa test evaluationconsistency between the two observers.A P-level of <0.05was consideredstatistically significant and k>0.60are good consistency.Results:1.Radiation dose results:Compared with the conventional tubevoltage group C (120kV),the low tube voltage group A,B two groups (80kV,100kV) radiation dose(CTDIvol,DLP,ED)are significantly reduced,Theespecially in the80kV group and the difference was statistically signifycan-ce2.Quantitative image analysis:with the tube voltage reducing reinforcementvalue the blood vessels of the head incease and the differences are statisticallysignificant,at the same time the image noise significantly increase when tubevoltage is reduced,but the differences of CNR and SNR in the patients of thethree groups has no statistical significance.3.Qualitative analysis of imagequality:With the lower tube voltage,the vessel edge sharpness is reduced,whilesmall branch vessels increased, the vein interference increase,but the overallquality of image quality and image differences between the three groups inMIP,MPR,VR three-dimensional image has no statistical significance,and noeffect in diagnosis of cerebral vascular diseases.4.Two observers rated good.ConsistencyConclusion:128-slice spiral CT low tube voltage scanningcan significantly reduce radiation dose in head digital subtraction CTangiography,increased vascular signal intensity, and no significant effect on theimage quality and clinical diagnosis, which has the feasibility in clinicalapplication.

Related Dissertations

  1. The Clinic Value of Diffusion Weighted Whole Body Imaging with Background Body Signal Suppression (DWIBS) Compared with hPET/CT,R445.2
  2. Clinical Application Research of CT Urography in Mini-percutaneous Nephrolithotomy,R699
  3. Clinical Observation Analysis of Ocular Ischemic Syndrome,R771
  4. Without contrast agent -dimensional TOF MR angiography with France multidetector CT angiography in the diagnosis of lower extremity arterial disease comparative study,R816.2
  5. Multislice CT and MRI angiography in the diagnosis of Takayasu arteritis,R445.2
  6. Multislice spiral computed tomography analysis of aortic sinus arrhythmia anatomical characteristics and clinical relevance,R541.7
  7. Lung cancer and benign lung tumor CT misdiagnosis and control study,R734.2
  8. Uniform Image Quality Achieved by Individual Tube Current Modulation in Coronary CT Angiography: Preliminary Study,R816.2
  9. Traveling CTA study the three-dimensional anatomical variations and vertebral artery transverse section,R681.55
  10. Imageological Evaluation on Knee Joint Injury and It’s Reconstructive Structures,R816.8
  11. Study of Correlation between the CT Features and Lens Culinaris Agglutinin-reactive a-Fetoprotein (AFP-L3%) in Hepatocellular Carcinoma,R735.7
  12. Study on Fast External Dose Estimation Method in Nuclear and Radiological Event with Software Development,R144
  13. A Study of the Variation and the Anatom of the Left Adrenal Vein with MSCTA,R816.6
  14. The Value of Research of 320 Row Dynamic Volume CT in the Evaluation of Coronary Artery Anatomy Structure,R816.2
  15. Experimental Study of Computerized Tomography and Pathological Change After Pulmonary Contusion Caused by Different Chest Impacting,R816.41
  16. Determination of Chemical Composition of upper Urinary Calculi by Noncontrast Helical Computed Tomography,R816.7
  17. A Study of the Application of Multi-slice Computed Tomography Angiography in the Diagnosis of Aortic Dissection,R816.2
  18. Tibial subchondral bone degeneration imaging studies,R816.8
  19. The Diagnostic Value of 64-slice Computed Tomography Virtual Endoscopy in Coronary Artery Diseases,R816.2
  20. 64-slice Spiral CT Imaging of Coronary CTA Optimization of Scanning Parameters,R816.2
  21. The Differential Diagnosis Value of Hepatobiliary Section Imaging to the Etiological Factor of the Persistent Jaundice in Infants,R817.4

CLC: > Medicine, health > Of Medical > Radiation Medicine > Each location and course of disease X - ray diagnosis and therapy > Skull and nervous system
© 2012 www.DissertationTopic.Net  Mobile