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Diffusion Weighted Imaging Analysis of Pelvic Adnexal Lesions and the Value in Diagnosis of Ascites

Author: JinRuiJuan
Tutor: MaQiangHua
School: Lanzhou University
Course: Imaging and Nuclear Medicine
Keywords: Pelvic attachments lesions Diffusion-weighted imaging Signal strength ADC values DWI Ascites Diagnosis
CLC: R445.2
Type: Master's thesis
Year: 2009
Downloads: 70
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Abstract


Part I: pelvic attachments benign and malignant lesions of DWI analysis and Pathological Findings purpose: analysis of the pelvic, Annex benign, malignant lesions of DWI characteristics, internal soft tissue and different liquid ingredients of the ADC value b value of select issues, explore DWI ADC value can be used to identify lesions and cystic components. Materials and Methods: A retrospective analysis of 117 confirmed by pathology, pelvic attachments benign and malignant lesions of the image data, measuring the b-value = 50s/mm 2 400s/mm 2 , 800s/mm 2 of benign and malignant lesions of the signal strength of the soft tissue component analysis of signal attenuation law, to choose the best b-value, compare contrast noise ratio (CNR) and ADC value analysis of different cystic ingredients conventional image, DWI characteristics and the mean ADC value. RESULTS: Lesions best b value = 800s/mm 2 . B value = 800s/mm 2 benign lesions of the soft tissue component CNR = 46.25 ± 15.84, malignant lesions of the soft tissue component CNR = 142.25 ± 34.82. ADC value of the soft-tissue component of the benign lesions: (2.079 ± 0.251) x10 -3 mm 2 / malignant lesions of the soft-tissue components of the ADC value = (1.258 ± 0.332) x10 < sup> -3 mm 2 / s. Vicious CNR than benign lesions, the ADC value lower than benign lesions, two groups difference was statistically significant (P <0.05), CNR, the ADC value intermediate benign and malignant are likely pathological lesions closely correlation. The various liquid ADC values ??can predict but can not determine the nature of the cystic ingredients. Conclusion: DWI as functional imaging with conventional MRI used in pelvic Annex lesions can provide additional information. DWI through the analysis of the soft tissue component of the lesion internal ADC values ??for differentiating benign from malignant lesions, benign and malignant, can predict the cystic contents ingredients contribute to the display of small lesions and differential diagnosis. Part II: MR DWI value in the diagnosis of the cause of ascites Objective: To summarize the the MR DWI technology applications in abdominal, pelvic tumor promotion, to explore the value of DWI in the diagnosis of the cause of ascites. Methods: 188 cases of patients with ascites Siemens 1.5T MRI scanner line conventional scanning (T 1 WI T 2 WI fs-T 2 WI), SE-EPI-DWI sequence scan, DWI with b values ??= 800s/mm 2 . Analysis of MR appearance of the tumor marker, and follow-up results, MR DWI tumor marker method diagnostic sensitivity, specificity, there is no difference; compare WB-DWI method and the non-application of preoperative staging accuracy there is no difference. Results: The high specificity of MR DWI technology than tumor marker (92.0% vs33.3%, P <0.05); application of WB-DWI than the non-application of preoperative staging accuracy, two groups were statistically significant (x 2 = 5.29, p = 0.021 <0.05). Conclusion: DWI can identify the tumor and non-neoplastic lesions predict malignant ascites matter of cystic peritoneal effusion (accumulation of blood, empyema) accurate differential diagnosis, should be widely applied in the diagnosis of the cause of ascites.

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