Fat suppression techniques (STIR vs. SPAIR) on diffusion-weighted imaging of breast lesions at 3.0 T: preliminary experience

被引:19
作者
Brandao, Sofia [1 ]
Nogueira, Luisa [2 ,3 ]
Matos, Eduarda [4 ]
Nunes, Rita Gouveia [5 ]
Ferreira, Hugo Alexandre [5 ]
Loureiro, Joana [1 ]
Ramos, Isabel [1 ]
机构
[1] Univ Porto, Fac Med, Dept Radiol, Ctr Hosp Sao Joao EPE, P-4200319 Oporto, Portugal
[2] Univ Porto, Fac Med, Ctr Hosp Sao Joao EPE, P-4200319 Oporto, Portugal
[3] Oporto Polytech Inst ESTSP IPP, Sch Appl Hlth Sci, P-4400330 Vila Nova De Gaia, Portugal
[4] Abel Salazar Porto Univ ICBAS, Inst Biomed Sci, Dept Hlth Commun, P-4050313 Oporto, Portugal
[5] Univ Lisbon, Fac Sci, Inst Biophys & Biomed Engn IBEB, P-1749016 Lisbon, Portugal
来源
RADIOLOGIA MEDICA | 2015年 / 120卷 / 08期
关键词
Magnetic resonance imaging; Breast diffusion-weighted imaging; Fat suppression techniques; Image quality; DIFFERENTIAL-DIAGNOSIS; INVERSION-RECOVERY; COEFFICIENT ADC; MRI; SIGNAL; CARCINOMA; BENIGN; TESLA; PULSE;
D O I
10.1007/s11547-015-0508-2
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose The aim of this work was to perform a qualitative and quantitative comparison of the performance of two fat suppression techniques on breast diffusion-weighted imaging (DWI). Materials and methods Fifty-one women underwent clinical breast magnetic resonance imaging, including DWI with short TI inversion recovery (STIR) and spectral attenuated inversion recovery (SPAIR). Four were excluded from the analysis due to image artefacts. Rating of fat suppression uniformity and lesion visibility were performed. Agreement between the two sequences was evaluated. Additionally, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and apparent diffusion coefficient (ADC) values for normal gland, benign and malignant lesions were compared. Receiver operating characteristic analysis was also performed. Results From the 52 lesions found, 47 were detected by both sequences. DWI-STIR evidenced more homogeneous fat suppression (p = 0.03). Although these lesions were seen with both techniques, DWI-SPAIR evidenced higher score for lesion visibility in nine of them. SNR and CNR were comparable, except for SNR in benign lesions (p < 0.01), which was higher for DWI-SPAIR. Mean ADC values for lesions were similar. ADC for normal fibroglandular tissue was higher when using DWI-STIR (p = 0.006). Sensitivity, specificity, accuracy and area under the curve values were alike: 84.0 % for both; 77.3, 71.4 %; 80.9, 78.3 %; 82.5, 81.3 % for DWI-SPAIR and DWI-STIR, respectively. Conclusion DWI-STIR showed superior fat suppression homogeneity. No differences were found for SNR and CNR, except for SNR in benign lesions. ADCs for lesions were comparable. Findings in this study are consistent with previous studies at 1.5 T, meaning that both fat suppression techniques are appropriate for breast DWI at 3.0 T.
引用
收藏
页码:705 / 713
页数:9
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