共查询到5条相似文献,搜索用时 0 毫秒
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Kenneth J Niermann Arthur C Fleischer Jessica Huamani Thomas E Yankeelov Dong W Kim Wendy D Wilson Dennis E Hallahan 《Journal of ultrasound in medicine》2007,26(6):749-756
OBJECTIVE: The purpose of this study was to evaluate the ability of dynamic microbubble contrast-enhanced sonography (MCES), in comparison with dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and fluorodeoxyglucose positron emission tomography (FDG-PET), to quantitatively characterize tumor perfusion in implanted murine tumors before and after treatment with a variety of regimens. METHODS: Seventeen mice with Lewis lung carcinoma implants were categorized to control, radiation therapy alone, antiangiogenic chemotherapy alone, and combined chemoradiation. On day 0 of each treatment regimen, MCES and DCE-MRI of each tumor were performed. On day 5 of treatment, dynamic FDG-PET, MCES, and DCE-MRI were performed. RESULTS: Microbubble contrast-enhanced sonography showed that intratumoral perfusion, blood volume, and blood velocity were highest in the untreated control group and successively lower in each of the treatment groups: radiation therapy alone resulted in a two-thirds reduction of perfusion; antiangiogenic chemotherapy resulted in a relatively larger reduction; and combined chemoradiotherapy resulted in the largest reduction. Microbubble contrast-enhanced sonography revealed longitudinal decreases in tumor perfusion, blood volume, and microvascular velocity over the 5-day course of chemoradiotherapy (all P < .01); conversely, these values rose significantly for the untreated control tumors (P < .01). Dynamic contrast-enhanced MRI showed a smaller and statistically insignificant average decrease in relative tumor perfusion for treated tumors. Dynamic PET revealed delayed uptake of FDG in the tumors that underwent chemoradiotherapy. CONCLUSIONS: Microbubble contrast-enhanced sonography is an effective tool in the noninvasive, quantitative, longitudinal characterization of neovascularization in murine tumor models and is correlative with DCE-MRI and FDG-PET. Microbubble contrast-enhanced sonography has considerable potential in the clinical assessment of tumor neovascularization and in the assessment of the response to treatment. 相似文献
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Sotirios Bisdas Mehran Baghi Jens Wagenblast Theodosios Bisdas Choon Hua Thng Martin G. Mack Tong San Koh Ulrike Ernemann 《Clinical physiology and functional imaging》2009,29(5):339-346
Purpose: (i) To evaluate the feasibility of tracer kinetics analysis of dynamic contrast‐enhanced (DCE) CT and T2‐weighted MR data of squamous cell carcinoma (SCCA) of the upper aerodigestive tract. (ii) To compare functional parameters derived by both modalities and examine the interchangeability of them as well as the intra‐ and inter‐rater agreement. Materials and methods: Dynamic contrast‐enhanced‐CT and MR images of 23 patients with SCCA were postprocessed using a distributed‐parameter (DP) tracer kinetic model. The evaluated parameters included blood flow (F), intravascular blood volume (v1), extravascular extracellular blood volume (v2), intravascular mean transit time (t1), lag time (t0), permeability surface area product (PS) and extraction ratio (E). Mean perfusion values, based on region‐of‐interest analysis, of the tumors and the healthy muscle tissue were compared and correlated. Inter‐rater and intra‐rater variability were assessed. Interchangeability of the tumor functional parameters was tested using Pearson’s correlation coeficients and Bland–Altman plots. Results: The mean values in tumor and healthy muscle tissues were significantly different for each modality (0·0001≤P≤0·03). The mean values of all tumor perfusion parameters apart from v2 and E were significantly different (0·001≤P≤0·009) between the two modalities. The intra‐rater variability was good to very good for all parameters. The inter‐rater variability was moderate to good. Bland–Altman plots of F, t1, t0, and v2 showed moderate interchangeability. There was a proportionality error in v1 and PS graphs. Conclusion: The estimation of functional parameters in SCCA is feasible using DCE‐CT and ‐MR with a DP model. The parameters are mostly significantly different and the interchangeability of them is limited. 相似文献
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Giorgos Papanastasiou Michelle C Williams Lucy E Kershaw Marc R Dweck Shirjel Alam Saeed Mirsadraee Martin Connell Calum Gray Tom MacGillivray David E Newby Scott IK Semple 《Journal of cardiovascular magnetic resonance》2015,17(1)