Application of Reduced-FOV Diffusion-Weighted Imaging in Evaluation of Normal Pituitary Glands and Pituitary Macroadenomas

Wang, M.; Liu, H.; Wei, Xiaoer; Liu, C.; Liang, Ting; Zhang, X.; Jin, Cheng; Li, X.; Sun, Qi; Jiang, Hangyi; Yang, Junjun

doi:10.3174/ajnr.a5735

Cited by 9 publications

(7 citation statements)

References 27 publications

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“…Previous studies found that the advantages of rFOV DWI were better image quality than conventional DWI in other organs. 16,17 For quantitative DCE-MRI parameters, this study found that K trans and k ep could differentiate low-risk TETs, high-risk TETs, and thymic carcinoma. Advanced stage TETs had higher K trans and k ep than early stage TETs.…”

Section: Discussionmentioning

confidence: 85%

“…It may be due to the different image quality between the two DWI methods. Previous studies found that the advantages of rFOV DWI were better image quality than conventional DWI in other organs 16,17 …”

Section: Discussionmentioning

confidence: 99%

“…However, single‐shot echo‐planar imaging is prone to artifacts, especially in regions of changing susceptibility, for example, in the anterior mediastinum 14,15 . Reduced field of view (rFOV) DWI has been used in many organs and has been shown to reduce distortion 16,17 . Moreover, DCE MRI can be used to obtain tumor hemodynamic parameters, which are also reported to be associated with histopathological features and prognosis 10,18 .…”

mentioning

confidence: 99%

“…14,15 Reduced field of view (rFOV) DWI has been used in many organs and has been shown to reduce distortion. 16,17 Moreover, DCE MRI can be used to obtain tumor hemodynamic parameters, which are also reported to be associated with histopathological features and prognosis. 10, 18 Kang et al found breast cancer presenting higher K trans and k ep on DCE-MRI was associated with poor prognostic histologic factors.…”

mentioning

confidence: 99%

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Multiparametric Magnetic Resonance Imaging for Assessing Thymic Epithelial Tumors: Correlation With Pathological Subtypes and Clinical Stages

Shen

Zhang

Zhu

et al. 2022

Magnetic Resonance Imaging

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Background World Health Organization classification and Masaoka‐Koga stage are widely used for thymic epithelial tumors (TETs). Reduced field‐of‐view (rFOV) diffusion‐weighed imaging (DWI) proved to improve the image quality. Dynamic contrast‐enhanced (DCE) MRI was commonly used in evaluating tumors. Purpose To investigate the value of multiparametric MRI in evaluating TETs. Study Type Retrospective. Subjects Eighty‐seven participants including 38 low risk (52.08 ± 14.19 years), 30 high risk (52.40 ± 11.35 years), and 19 thymic carcinoma patients (59.76 ± 10.78 years). Field strength/Sequence A 3 T, turbo spin echo imaging, echo planar imaging, volumetric interpolated breath‐hold examination with radial acquisition trajectory. Assessment DCE‐MRI and apparent diffusion coefficient (ADC) variables were compared. Diagnostic performances of single significant factor and combined model were compared. Statistical Tests Parameters were compared using one‐way ANOVA or independent‐samples t test. Logistic regression was employed to investigate the combined model. Receiver operating curves (ROC) and DeLong's test were used to compare the diagnostic efficiency. Results ADC, Ktrans, and kep values were significantly different among low‐risk, high‐risk and carcinoma group (ADC, 1.279 ± 0.345 × 10−3 mm2/sec, 0.978 ± 0.260 × 10−3 mm2/sec, 0.661 ± 0.134 × 10−3 mm2/sec; Ktrans 0.167 ± 0.071 min−1, 0.254 ± 0.136 min−1, 0.393 ± 0.110 min−1; kep 0.345 ± 0.113 min−1, 0.560 ± 0.269 min−1, 0.872 ± 0.149 min−1). They were significantly different for early stage and advanced stage (ADC, 1.270 ± 0.356 × 10−3 mm2/sec vs. 0.845 ± 0.251 × 10−3 mm2/sec; Ktrans 0.179 ± 0.092 min−1 vs. 0.304 ± 0.142 min−1; kep 0.370 ± 0.181 min−1 vs. 0.674 ± 0.362 min−1). The combination of them had highest diagnostic efficiency for WHO classification (AUC, 0.925; sensitivity, 83.7%; specificity, 89.5%), clinical stage (AUC, 0.879; sensitivity, 80.9%; specificity, 82.5%). Data Conclusion Multiparametric MRI model may be useful for discriminating WHO classification and clinical stage of TETs. Evidence Level 4 Technical Efficiency Stage 2

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Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Multiparametric Magnetic Resonance Imaging for Assessing Thymic Epithelial Tumors: Correlation With Pathological Subtypes and Clinical Stages

Shen

Zhang

Zhu

et al. 2022

Magnetic Resonance Imaging

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“…Помимо стандартных анатомических изображений, важную диагностическую информацию несут диффузионно-взвешенные изображения с построением карт измеряемого коэффициента диффузии, которые входят в стандарт обследования пациента и могут быть полезны при диагностике инфаркта или апоплексии гипофиза [47], выявлении кистозных участков в объемном образовании [56] и раннем обнаружении остаточных фрагментов опухоли [57]. Оправданно применение диффузионно-взвешенных импульсных последовательностей с меньшей чувствительностью к источникам артефактов, таких как последовательности с уменьшенным полем обзора (FOCUS, ZOOMit, iZOOM) [58].…”

Section: Russian Journal Of Neurosurgeryunclassified

Pituitary adenomas: current principles of diagnosis and treatment

Астафьева

Chernov

Chekhonin

et al. 2021

Nejrohirurgiâ (Mosk.)

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В обзоре систематизированы знания о лечении пациентов с аденомами гипофиза. Аденомы гипофиза составляют 15 % от общего числа интракраниальных опухолей, занимая 3-е место по частоте после менингиом и глиом головного мозга. К настоящему времени проведены многочисленные исследования этой патологии. Разработаны международные алгоритмы диагностики и лечения аденом гипофиза с различной гормональной активностью, включающие применение медикаментозных, хирургических и лучевых методов.

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