目的:由于大量伪影,单次回波平面成像(ss-EPI)在脊柱成像中的应用受到限制。因此,我们旨在比较读出分段回波平面成像(rs-EPI)和ss-EPI,并评估其在椎体感染鉴别诊断中的价值,肿瘤浸润,和退行性疾病。
方法:66例成人脊椎盘炎患者(SD,n=26),肿瘤浸润(TI,n=20),或ModicI型变性(DE,n=20)这项回顾性研究包括脊柱磁共振成像(MRI)的发现。两名放射科医生以4分制对图像质量进行评分(图像分辨率,几何失真程度,病变选择性,和诊断可靠性)和测量的信号强度(SI),表观扩散系数(ADC),信噪比(SNR),和对比度噪声比(CNR)。DE和SD组也联合组成良性组。
结果:在所有组中,rs-EPI的图像质量优于ss-EPI,SNR,和CNR(p<0.05)。两种序列中平均病理ADC(ADCP)之间的差异具有统计学意义(p<0.05)。在rs-EPI的ADCP方面,两组之间没有显着差异(p=0.229),与SS-EPI(p=0.025)不同。恶性组rs-EPI病理性SI(SIP)和CNR显著高于良性组(p=.002,p<.001)。在rs-EPI中,恶性和良性ADCP组之间无显著差异(p=.13)。
结论:rs-EPI是一种扩散加权成像(DWI)方法,具有更高的图像质量,可减少运动引起的相位误差并通过相位校正提高分辨率。然而,rs-EPI与ss-EPI相比,恶性和良性椎体骨髓病变的区别不令人满意。
OBJECTIVE: Single-shot echo-planar imaging (ss-EPI) has limited application in vertebral column imaging due to numerous artifacts. Therefore, we aimed to compare readout-segmented echo-planar imaging (rs-EPI) to ss-EPI and assess its value in the differential diagnosis of vertebral infectious, tumoral infiltrative, and degenerative disorders.
METHODS: Sixty-six adult patients with spondylodiscitis (SD, n = 26), tumoral infiltration (TI, n = 20), or Modic type I degeneration (DE, n = 20) findings on spinal magnetic resonance imaging (MRI) included in this retrospective study. Two radiologists scored images for quality on a 4-point scale (image resolution, degree of geometric distortion, lesion selectivity, and diagnostic reliability) and measured signal intensity (SI), apparent diffusion coefficient (ADC), signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR). DE and SD groups also united to form the benign group.
RESULTS: In all groups, rs-EPI performed better than ss-EPI in image quality, SNR, and CNR (p < .05). The difference between mean pathological ADC (ADCP) in the two sequences was statistically significant (p < .05). There was no significant difference between the groups in terms of ADCP in rs-EPI (p = .229), unlike ss-EPI (p = .025). Pathological SI (SIP) and CNR in rs-EPI were significantly higher in the malignant group than benign group (p = .002, p < .001). In rs-EPI, no significant difference was found between malignant and benign groups\' ADCP (p = .13).
CONCLUSIONS: The rs-EPI is a diffusion-weighted imaging (DWI) method with higher image quality that diminishes motion-induced phase errors and increases resolution through phase corrections. However, the distinction of malignant and benign vertebral bone marrow pathologies is unsatisfactory for rs-EPI compared with ss-EPI.