泌尿器科悪性腫瘍におけるMRIの臨床的位置づけ 第3報. 膀胱癌,前立腺癌に対するMRIの新しい試み: Surface coilとMRI用造影剤Gadolinium diethylaminetriaminepentaaceticacid(DTPA)の使用

Abstract

膀胱腫瘍, 前立腺癌に対しsurface coilを使用した撮像, Gd-DTPAを投与しsurface coilあるいは全身コイルのズーミングを行った撮像を得た.surface coilは空間分解能, 濃度分解能は良くなったが, 体表から深いところでの画像は不明瞭であった.Gd-DTPAの使用により膀胱癌, 前立腺癌ともenhanceされ, local stagingに今まで以上に役立つと思われた

We performed MRI in several recent cases of bladder cancer and prostatic cancer using a general coil or a 5-inch general purpose surface coil with or without Gd-DTPA. The surface coil improves the spacial resolution, density resolution and signal to noise ratio but reduces the field and the signal detection drops off as the depth from the surface increases. Moreover, additional time is required for patient positioning. In Gd-DTPA enhanced images of bladder cancer, the muscle layer became more distinct, and the images of tumor and bladder mucosa were enhanced, suggesting that facilitates evaluation of the extent of bladder wall invasion of the tumor. In Gd-DTPA enhanced images of prostatic cancer, the area conside to correspond to the tumor was enhanced. MRI using a surface coil and Gd-DTPA is considered to provide detailed information of bladder and prostatic cancer.