GRE, gradient echo

  • 文章类型: Case Reports
    X连锁肾上腺脑白质营养不良是一种罕见的遗传性过氧化物酶体疾病,由于基因突变而发生。这种突变损害了非常长链脂肪酸(VLCFAs)向过氧化物酶体的正常运输,因此阻碍VLCFA分解,导致其在血浆和身体组织中的积累。由于其X链接的继承,它通常影响年轻男性,大多数病例在童年时期被诊断出来。大脑中有特征性的MRI表现可以帮助X-ALD的诊断。我们在此介绍一个10岁男孩的病例,该男孩表现出神经系统和行为恶化,MRI表现提示X-ALD。MRI不仅有助于X-ALD的诊断,而且还可以识别脑受累的模式,这在疾病的预后和结局中起着重要作用。
    X-linked adrenoleukodystrophy is a rare inherited peroxisomal disorder that occurs due to a genetic mutation. This mutation impairs normal transport of very long-chain fatty acids (VLCFAs) into peroxisomes, hence impeding VLCFA breakdown leading to its accumulation in plasma and tissues of the body. Due to its X-linked inheritance, it classically affects young males with most cases diagnosed during childhood. There are characteristic MRI findings in brain which can aid in diagnosis of X-ALD. We hereby present a case of a 10-year-old boy who presented with neurological and behavioral deterioration with MRI findings suggestive of X-ALD. MRI not only aids in diagnosis of X-ALD but can also identify the pattern of brain involvement which serves an important role in prognosis and outcome of the disease.
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  • 文章类型: Journal Article
    SORAMIC是肝细胞癌(HCC)的一项前瞻性II期随机对照试验。它由3部分组成:一项诊断研究和2项治疗研究,包括治愈性消融或姑息性钇90放射栓塞联合索拉非尼。我们报告了一项诊断队列研究,旨在确定gadoxetic酸增强磁共振成像(MRI)的准确性,包括与对比增强计算机断层扫描(CT)相比的肝胆期(HBP)成像特征。主要目标是治疗决策的准确性,将患者分层以进行治愈性或姑息性(非消融)治疗。
    临床疑似HCC的患者接受了gadoxetic酸增强MRI(HBPMRI,包括动态MRI)和对比增强CT。由2个读取器组(放射科医生,R1和R2)。可以访问所有临床数据和随访成像的事实面板作为参考。治愈性消融的成像标准定义为多达4个<5cm的病变和没有大血管侵犯。主要终点是HBPMRI的非劣效性与第一步是CT,第二步是优势。
    意向治疗人群包括538名患者。HBPMRI(R1和R2)的治疗决策与事实小组评估相符,分别为83.3%和81.2%,CT为73.4%和70.8%。HBPMRI的非劣效性和优越性(第二步)与CT显示(比值比1.14[1.09-1.19])。HBPMRI识别>4个病灶的患者的频率明显高于CT。
    在HCC中,HBPMRI提供了比CT更准确的治疗决策姑息治疗策略。
    肝细胞癌患者根据其疾病阶段进行治愈性或姑息性治疗。使用gadoxetic酸增强的MRI进行肝胆成像比CT更准确地进行治疗决策。
    UNASSIGNED: SORAMIC is a prospective phase II randomised controlled trial in hepatocellular carcinoma (HCC). It consists of 3 parts: a diagnostic study and 2 therapeutic studies with either curative ablation or palliative Yttrium-90 radioembolisation combined with sorafenib. We report the diagnostic cohort study aimed to determine the accuracy of gadoxetic acid-enhanced magnetic resonance imaging (MRI), including hepatobiliary phase (HBP) imaging features compared with contrast-enhanced computed tomography (CT). The primary objective was the accuracy of treatment decisions stratifying patients for curative or palliative (non-ablation) treatment.
    UNASSIGNED: Patients with clinically suspected HCC underwent gadoxetic acid-enhanced MRI (HBP MRI, including dynamic MRI) and contrast-enhanced CT. Blinded read of the image data was performed by 2 reader groups (radiologists, R1 and R2). A truth panel with access to all clinical data and follow-up imaging served as reference. Imaging criteria for curative ablation were defined as up to 4 lesions <5 cm and absence of macrovascular invasion. The primary endpoint was non-inferiority of HBP MRI vs. CT in a first step and superiority in a second step.
    UNASSIGNED: The intent-to-treat population comprised 538 patients. Treatment decisions matched the truth panel assessment in 83.3% and 81.2% for HBP MRI (R1 and R2), and 73.4% and 70.8% for CT. Non-inferiority and superiority (second step) of HBP MRI vs. CT were demonstrated (odds ratio 1.14 [1.09-1.19]). HBP MRI identified patients with >4 lesions significantly more frequently than CT.
    UNASSIGNED: In HCC, HBP MRI provided a more accurate decision than CT for a curative vs. palliative treatment strategy.
    UNASSIGNED: Patients with hepatocellular carcinoma are allocated to curative or palliative treatment according to the stage of their disease. Hepatobiliary imaging using gadoxetic acid-enhanced MRI is more accurate than CT for treatment decision-making.
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  • 文章类型: Journal Article
    Present article is a review of radiological features of hepatocellular carcinoma on various imaging modalities. With the advancement in imaging techniques, biopsy is rarely needed for diagnosis of hepatocellular carcinoma (HCC), unlike other malignancies. Imaging is useful not only for diagnosis but also for surveillance, therapy and assessing response to treatment. The classical and the atypical radiological features of HCC have been described.
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