【摘要】 目的研究国人正常成年男性前列腺螺旋CT动态增强表现。方法收集无自觉泌尿系症状、以其他疾患就诊断需要行胸、腹部CT增强检查的107例成年男性非重症患者,在志愿的前提下行前列腺平扫及动态螺旋CT增强扫描;造影剂为碘海醇注射液(IohexolInjection)85～90ml,注射速率3ml/s,连续注射,在开始注射后72±8s行动脉期扫描,144±20s行静脉期扫描,至268±25s行延时期扫描。根据CT图像观察前列腺强化情况,并测量平扫及动态增强前列腺的前纤维肌肉基质区、中央区左右两侧、外周区左右两侧和后部的CT值,分≤59岁和>59岁两年龄组并经统计学处理。结果正常前列腺动态增强CT扫描不同强化期前列腺各解剖分区有不同强化,动脉期和静脉期扫描时前列腺中央区密度明显高于外周区,有显著差异;动脉期中央区、外周区边界显示清晰;不同年龄组前列腺强化特点不同,>59岁年龄组中的有生理性增生者中央区体积明显增大,中央区与外周区比值增大。结论前列腺螺旋CT动态增强扫描内部密度变化有一定的规律性,其动态CT增强影像改变是基于前列腺的供血动脉解剖特点,螺旋CT动态增强扫描研究为前列腺病变的诊断提供了正常影像学基础。更多还原

【Abstract】 Objective A study of the normal findings of Chinese adult prostatic gland with dynamic contrast- enhanced CT scan. Methods In total 107 adult male volunteers without urinary symptoms or indication of emergencies were enrolled in the study when they recieved CT examination of chest or abdomen. Non contrast- enhanced CT scan followed by dynamic contrast- enhanced CT scan was performed on the organ. The contrast media was Omnipaque in a dose of 85- 90ml and at a 3ml/s intravenous bolus injection speed. The acquisition of arterial phase was triggered at 72± 8 s after the injection started, the venous phase begun at 144± 20s , and the delayed phase was activated at 268± 25s. Images obtained were reviewed to study the enhancement of prostatic gland. CT values were measured at the anterior fibromuscular stroma, both LR sides of the central zone and the peripheral zone, and the posterior part as well. These values were divided into two groups by the age ≤ 59 years or >59 years and statistically analyzed. Results Each anatomical zone of these normal prostatic glands had different enhancement during various phases. The CT value of the central zone was higher than that of the peripheral zone at both arterial and venous phases, which resulted in statistical difference. A distinctive border between the peripheral zone and central zone was demonstrated in the arterial phase. Difference was found between the two age groups: in the group of age>59 years, the central zone of those prostatic glands with physiological hyperplasia were apparently enlarged. The ratio of the central zone to the peripheral zone was greater. Conclusion The density of each part of the prostatic gland altered regularly during the contrast- enhancd CT scan. These findings were based on the characteristic vascularity of the organ. Our study of the normal prostatic gland using dynamic contrast- enhanced CT scan provides a fundamental normal model for the diagnosis of the disorders of the prostatic gland.更多还原