本文選題：磁共振 + D�。� 參考：《臨床放射學雜志》2016年09期

【摘要】：目的對比3D T1-FLASH單倍劑量、雙倍劑量、雙倍劑量聯(lián)合磁化傳遞(MT)增強掃描三種方法對腦轉(zhuǎn)移瘤的顯示價值。方法對60例腦轉(zhuǎn)移瘤患者行MRI增強掃描,每種方法各20例。分別測量圖像組織的信噪比(SNR)、轉(zhuǎn)移瘤的SNR、轉(zhuǎn)移瘤的對比噪聲比(CNR),并利用5分利克特表對混合信號腦轉(zhuǎn)移瘤(病灶一般5 mm,實質(zhì)部分發(fā)生囊變、壞死,信號混雜)和單一信號轉(zhuǎn)移瘤(病灶一般5 mm,實質(zhì)部分沒有囊變、壞死,信號單一)的顯示程度分別進行主觀評價。結果雙倍劑量聯(lián)合MT掃描中轉(zhuǎn)移瘤的SNR值和CNR值最高,雙倍劑量掃描中轉(zhuǎn)移瘤的SNR和CNR值次之,雙倍劑量聯(lián)合MT掃描與單倍劑量掃描之間的差異具有統(tǒng)計學意義(P0.05)。主觀評價三組掃描方法對兩種轉(zhuǎn)移瘤的成像質(zhì)量,差異具有統(tǒng)計學意義(P0.05),雙倍劑量聯(lián)合MT掃描對單一信號的小轉(zhuǎn)移瘤顯示最好;雙倍劑量掃描對混合信號的大轉(zhuǎn)移瘤成像質(zhì)量最好。結論雙倍劑量增強掃描和聯(lián)合MT技術掃描對不同大小的腦轉(zhuǎn)移瘤顯示價值不同。
[Abstract]:Objective to compare the value of 3D T1-FLASH monodose, double dose and magnetization transfer MTI enhanced scanning in the diagnosis of brain metastases. Methods MRI enhanced scanning was performed in 60 patients with brain metastases, 20 patients with each method. The signal-to-noise ratio (SNR) of the image tissue and the SNR of the metastatic tumor were measured respectively. The contrast noise ratio of the metastatic tumor was compared with that of the CNR. The mixed signal was used to treat the mixed signal brain metastases (the lesions were normal at 5mm, and the parenchyma was cystic and necrotic. The degree of display of mixed signal and single signal metastasis (5 mm in lesion, no cystic degeneration, necrosis, and single signal) in the parenchyma were evaluated subjectively. Results the SNR value and CNR value of metastatic tumor were the highest in double dose combined MT scan, followed by SNR and CNR in double dose scan. The difference between double dose combined MT scan and single dose scan was statistically significant (P 0.05). Subjective evaluation of the imaging quality of the two kinds of metastatic tumor by three groups of scanning methods, the difference was statistically significant (P 0.05). The double dose combined with MT scan was the best in showing the small metastatic tumor with single signal. Double dose scan has the best imaging quality for large metastatic tumor with mixed signal. Conclusion double dose enhanced scan and combined MT scan have different value in different size of brain metastases.
【作者單位】： 中國人民解放軍第89醫(yī)院放射科;
【基金】：全軍醫(yī)學科研“十二五”重點項目(編號:BJN13J001)
【分類號】：R739.41;R445.2

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