目的:分析毛细血管扩张型骨肉瘤影像学表现与病理的关系,以提高诊断准确性。方法:回顾性分析经手术病理证实的毛细血管扩张型骨肉瘤9例,术前分别经X线平片、CT平扫、MR SE T_1WI、T_2WI和T_1WI增强扫描,仔细复习影像征象并和手术病理作...目的:分析毛细血管扩张型骨肉瘤影像学表现与病理的关系,以提高诊断准确性。方法:回顾性分析经手术病理证实的毛细血管扩张型骨肉瘤9例,术前分别经X线平片、CT平扫、MR SE T_1WI、T_2WI和T_1WI增强扫描,仔细复习影像征象并和手术病理作对照。结果:9例毛细血管扩张型骨肉瘤中,位于股骨5例,胫骨3例和髂骨1例。位于长管状骨者,5例位于干骺端,2例位于骨干,1例接近骨端。肿瘤直径6.3～11.8 cm。所有肿瘤均为溶骨性骨质破坏,破坏区呈椭圆形5例,不规则地图形4例。病灶呈囊状9例,7例病灶境界不清,7例病变见骨膜增生,伴软组织肿块8例,所有病例软组织肿块境界清楚。5例行CT检查,病灶密度低于肌肉或与肌肉相仿,CT显示骨膜增生及软组织肿块较平片清楚,增强扫描软组织明显强化。4例行MR检查,T_1WI为混杂信号3例,低信号1例;T_2WI为低、等和高信号混杂4例。T_2WI 4例均可见明显囊状改变和液-液平面,均可见软组织成分,软组织构成囊壁和分隔,部分呈不规则肿块结节,T_2WI软组织信号高于肌肉。结论:毛细血管扩张型骨肉瘤好发于长管状骨干骺端,呈卵圆形或地图样溶骨性破坏,容易呈多囊状坏死,但肿瘤内常见软组织成分,常伴骨膜增生和骨外软组织肿块,CT增强扫描和MR有助于显示病灶的软组织成分。展开更多
Measuring the impacts of monetary policy on stock markets can of help to carry out monetary policy and stock markets investment.By impulse response analysis and variance decomposition,this paper reveals that the degre...Measuring the impacts of monetary policy on stock markets can of help to carry out monetary policy and stock markets investment.By impulse response analysis and variance decomposition,this paper reveals that the degree and lag of the impacts have close relation to the regulation pattern of monetary policy;the impacts of money supply and interbank offer rates are strengthened,while that of loan scale is weakened;whether policy goal can be attained relies greatly on the degree of the connection of money market and stock markets.展开更多
文摘目的:分析毛细血管扩张型骨肉瘤影像学表现与病理的关系,以提高诊断准确性。方法:回顾性分析经手术病理证实的毛细血管扩张型骨肉瘤9例,术前分别经X线平片、CT平扫、MR SE T_1WI、T_2WI和T_1WI增强扫描,仔细复习影像征象并和手术病理作对照。结果:9例毛细血管扩张型骨肉瘤中,位于股骨5例,胫骨3例和髂骨1例。位于长管状骨者,5例位于干骺端,2例位于骨干,1例接近骨端。肿瘤直径6.3～11.8 cm。所有肿瘤均为溶骨性骨质破坏,破坏区呈椭圆形5例,不规则地图形4例。病灶呈囊状9例,7例病灶境界不清,7例病变见骨膜增生,伴软组织肿块8例,所有病例软组织肿块境界清楚。5例行CT检查,病灶密度低于肌肉或与肌肉相仿,CT显示骨膜增生及软组织肿块较平片清楚,增强扫描软组织明显强化。4例行MR检查,T_1WI为混杂信号3例,低信号1例;T_2WI为低、等和高信号混杂4例。T_2WI 4例均可见明显囊状改变和液-液平面,均可见软组织成分,软组织构成囊壁和分隔,部分呈不规则肿块结节,T_2WI软组织信号高于肌肉。结论:毛细血管扩张型骨肉瘤好发于长管状骨干骺端,呈卵圆形或地图样溶骨性破坏,容易呈多囊状坏死,但肿瘤内常见软组织成分,常伴骨膜增生和骨外软组织肿块,CT增强扫描和MR有助于显示病灶的软组织成分。
文摘Measuring the impacts of monetary policy on stock markets can of help to carry out monetary policy and stock markets investment.By impulse response analysis and variance decomposition,this paper reveals that the degree and lag of the impacts have close relation to the regulation pattern of monetary policy;the impacts of money supply and interbank offer rates are strengthened,while that of loan scale is weakened;whether policy goal can be attained relies greatly on the degree of the connection of money market and stock markets.
