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DEVELOPMENT OF CONTRAST ENHANCED RODENT IMAGING USING FUNCTIONAL CT

机译:用功能CT开发增强造影剂成像的技术

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摘要

Micro-computed tomography (microCT) is capable of obtaining high-resolution images of skeletal tissues. However its image contrast among soft tissues remains inadequate for tumor detection. High speed functional computed tomography will be needed to image tumors by employing x-ray contrast medium. The functional microCT development will not only facilitate the image contrast enhancement among different tissues but also provide information of tumor physiology. To demonstrate the feasibility of functional CT in mouse imaging, sequential computed tomography is performed in mice after contrast material administration using a high- speed clinical CT scanner. Although the resolution of the clinical scanner is not sufficient to dissolve the anatomic details of rodents, bulky physiological parameters in major organs such as liver, kidney, pancreas, and ovaries (testicular) can be examined. For data analysis, a two-compartmental model is employed and implemented to characterize the tissue physiological parameters (regional blood flow, capillary permeability, and relative compartment volumes.) The measured contrast dynamics in kidneys are fitted with the compartmental model to derive the kidney tissue physiology. The study result suggests that it is feasible to extract mouse tissue physiology using functional CT imaging technology.
机译:微型计算机断层扫描(microCT)能够获得骨骼组织的高分辨率图像。然而,其在软组织之间的图像对比度仍然不足以用于肿瘤检测。通过使用X射线造影剂,将需要高速功能计算机断层扫描来对肿瘤成像。功能性microCT的开发不仅将促进不同组织之间的图像对比度增强,而且还将提供肿瘤生理学信息。为了证明功能性CT在小鼠成像中的可行性,使用高速临床CT扫描仪在对比剂给药后在小鼠中进行了顺序计算机断层扫描。尽管临床扫描仪的分辨率不足以溶解啮齿动物的解剖学细节,但是可以检查主要器官(例如肝脏,肾脏,胰腺和卵巢(睾丸))中的庞大生理参数。为了进行数据分析,采用了两室模型来实现组织生理参数(区域血流量,毛细血管通透性和相对室体积)的特征。生理。研究结果表明,使用功能性CT成像技术提取小鼠组织生理学是可行的。

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