快速FLAIR技术在腹盆腔MRI中的应用及价值

The Value of Fast FLAIR Pulse Sequence in MRI of Abdomen and Pelvic Cavity

目的： 评价快速ＦＬＡＩＲ 技术在腹盆腔ＭＲＩ 中的应用价值。材料与方法： 在常规腹部或盆腔ＭＲＩ 基础上，对３８ 例有含液病灶的病例加做快速ＦＬＡＩＲ 成像，ＴＲ５０００ ～６０００ｍｓ ，ＴＩ１５００ ～２０００ ｍｓ ，ＴＥ ９０ ～１２０ｍｓ 。结果： ２７ 例经手术病理证实，肝巨大囊肿７ 例，肝脓肿３ 例，膈下脓肿２ 例，胰头陈旧性出血性囊肿１ 例，肾巨大囊肿３ 例，先天性输尿管狭窄致肾盂扩大积水２ 例，卵巢单纯性囊肿５ 例，卵巢囊腺癌１ 例，卵巢冠囊肿１ 例，早期胚胎１ 例，恶性葡萄胎１ 例。在ＦＬＡＩＲ 像上表现为高信号的病灶有肝脓肿，膈下脓肿，胰头陈旧性血肿以及恶性葡萄胎。表现为低信号的病灶有肾盂积水、单纯性卵巢囊肿及卵巢冠囊肿，其信号强度与脑脊液或尿液基本一致。表现为等信号的病灶有肾囊肿和卵巢囊腺癌。肝囊肿表现多样，可为稍高信号、等信号或低信号。结论： 快速ＦＬＡＩＲ技术有助于腹盆腔内含液病灶的定性。

Objective: To evaluate fast FLAIR pulse sequence in abdominal and pelvic applications.Materials and Methods:Thirty eight patients with fluid containing lesions in abdomen or pelvic cavity were imaged with fast FLAIR pulse sequence after routine T 1WI and T 2WI, using the following parameters: TR=5 000～6 000ms, TI=1 500～2 000ms, TE=90～120ms.Results:Of 38 patients, 27 underwent surgical treatment. The lesions were proved to be as the following diseases: huge hepatic cyst (n=7), hepatic abscess (n=3), subdiaphragmatic abscess (n=2), old hemorrhagic cyst of pancreatic head (n=1), large renal cyst (n=3), nephrohydrosis (n=2), huge ovarian simple cyst (n=5), cystadenocarcinoma of ovary (n=1), parovarian cyst (n=1), early embryo (n=1) and malignant mole (n=1). On FLAIR images, hepatic and subdiaphragmatic abscess, old hemorrhage of pancreatic head and malignant mole presented as hyperintensity lesion, while nephrohydrosis, ovarian simple cyst and early embryo had a signal intensity as low as that of CSF or urine. Renal cyst and ovarian cystadenocarcinoma were isointensity. Signal of hepatic cysts varied from low intensity to slightly hyperintensity.Conclusion: Fast FLAIR pulse sequence is helpful in making differential diagnosis of fluid containing lesion in abdominal or pelvic cavity.