Comparative study of images with pathology: Superparamagnetic iron oxide-enhanced magnetic resonance image (MRI) of splenic VX2 tumor in rats

IMR OpenIR

	Comparative study of images with pathology: Superparamagnetic iron oxide-enhanced magnetic resonance image (MRI) of splenic VX2 tumor in rats
其他题名	Comparative Study of Images with Pathology： Superparamagnetic Iron Oxide-enhanced Magnetic Resonance Image （MRI） of Splenic VX2 Tumor in Rats
	Yang Hongyan 1; Xu Yikai 2; Wu Yuankui 2; Liu Wenyuan 3; Lue Guoshi 2; Cao Guohong 2
	2008
发表期刊	CHINESE JOURNAL OF CANCER RESEARCH
ISSN	1000-9604
卷号	20 期号:1 页码:26-32
摘要	Objective: To establish a rodent model of VX2 tumor of the spleen, to analyze relationship between the change of the signal intensity on superparamagnetic iron oxide enhanced magnetic resonance image (MRI) and pathologic change to evaluate the ability of superparamagnetic iron oxide enhanced MRI for detection of splenic metastases. Methods: 8 rodent models of VX2 tumor of spleen were established successfully. The images were obtained before and after administration of superparamagnetic iron oxide. T1-weighted spin-echo (SE) pulse sequence with a repetition time (TR) of 450 msec, and echo time (TE) of 12 msec (TR/TE= 450/12) was used. The imaging parameters of T2-weighted SE pulse sequence were as follows: TR/TE= 4000/128. Results: On plain MR scanning T1-weighted splenic VX2 tumor showed hypointensity or isointensity which approximated to the SI of splenic parenchyma. Therefore all lesions were not displayed clearly. On superparamagnetic iron oxide enhancement T2WI sequence the SI of splenic parenchyma decreased obviously with percentage of signal intensity loss (PSIL) of 55.04%, But the SI of tumor was not evidently changed with PSIL of 0.87%. Nevertheless the SNR of normal splenic parenchyma around the lesions had obvious difference (P< 0.001) comparatively. Therefore the contrast between tumor and spleen increased, and tumor displayed more clearly. Moreover the contrast-to-noise (CNR) between VX2 tumor and splenic parenchyma had an evident difference before and after admininstration of superparamagnetic iron oxide (P< 0.001). Conclusion: On superparamagnetic iron oxide enhancement T1WI sequence the contrast of tumor-to-spleen is poor. Therefore it is not sensitive to characterize the lesions in spleen. On superparamagnetic iron oxide enhanced T2WI the contrast degree of lesions increases obviously. Consequently, superparamagnetic iron oxide -enhanced T2WI MRI scanning can improve the rate of detection and characterization for lesions of spleen.
其他摘要	Objective： To establish a rodent model of VX2 tumor of the spleen, to analyze relationship between the change of the signal intensity on superparamagnetic iron oxide enhanced magnetic resonance image （MRI） and pathologic change to evaluate the ability of superparamagnetic iron oxide enhanced MRI for detection of splenic metastases. Methods： 8 rodent models of VX2 tumor of spleen were established successfully. The images were obtained before and after administration of superparamagnetic iron oxide. T1-weighted spin-echo （SE） pulse sequence with a repetition time （TR） of 450 msec, and echo time （TE） of 12 msec （TR/TE=450/12） was used. The imaging parameters of T2-weighted SE pulse sequence were as follows： TR/TE=4000/128. Results： On plain MR scanning T1-weighted splenic VX2 tumor showed hypointensity or isointensity which approximated to the SI of splenic parenchyma. Therefore all lesions were not displayed clearly. On superparamagnetic iron oxide enhancement T2WI sequence the SI of splenic parenchyma decreased obviously with percentage of signal intensity loss （PSIL） of 55.04%, But the SI of tumor was not evidently changed with PSIL of 0.87%. Nevertheless the SNR of normal splenic parenchyma around the lesions had obvious difference （P〈0.001） comparatively. Therefore the contrast between tumor and spleen increased, and tumor displayed more clearly. Moreover the contrast-to-noise （CNR） between VX2 tumor and splenic parenchyma had an evident difference before and after admininstration of superparamagnetic iron oxide （P〈0.001）. Conclusion： On superparamagnetic iron oxide enhancement T1WI sequence the contrast of tumor-to-spleen is poor. Therefore it is not sensitive to characterize the lesions in spleen. On superparamagnetic iron oxide enhanced T2WI the contrast degree of lesions increases obviously. Consequently, superparamagnetic iron oxide -enhanced T2WI MRI scanning can improve the rate of detection and characterization for lesions of spleen.
关键词	LIVER METASTASES RESOVIST SPLEEN spleen tumor superparamagnetic iron oxide magnetic resonance imaging pathology
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:3251546
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/153084
专题	中国科学院金属研究所
作者单位	1.Chengdu Army Gen Hosp, Department Med Imaging, Chengdu 610083, Peoples R China 2.中国科学院广州地球化学研究所 3.中国科学院金属研究所
推荐引用方式 GB/T 7714	Yang Hongyan,Xu Yikai,Wu Yuankui,et al. Comparative study of images with pathology: Superparamagnetic iron oxide-enhanced magnetic resonance image (MRI) of splenic VX2 tumor in rats[J]. CHINESE JOURNAL OF CANCER RESEARCH,2008,20(1):26-32.
APA	Yang Hongyan,Xu Yikai,Wu Yuankui,Liu Wenyuan,Lue Guoshi,&Cao Guohong.(2008).Comparative study of images with pathology: Superparamagnetic iron oxide-enhanced magnetic resonance image (MRI) of splenic VX2 tumor in rats.CHINESE JOURNAL OF CANCER RESEARCH,20(1),26-32.
MLA	Yang Hongyan,et al."Comparative study of images with pathology: Superparamagnetic iron oxide-enhanced magnetic resonance image (MRI) of splenic VX2 tumor in rats".CHINESE JOURNAL OF CANCER RESEARCH 20.1(2008):26-32.