目的探讨增强CT检查在平扫CT图像中表现为纯磨玻璃结节或混合磨玻璃结节的浸润前病变、微浸润腺癌(MIA)和浸润性腺癌(IAC)诊断中的价值。 方法回顾性分析194例肺部磨玻璃结节患者的术前平扫和增强CT的影像学特征,其中浸润前病变组64例,MIA组80例,IAC组50例。依据平扫和增强CT图像显示的病灶内实性成份最大径对病灶的...
This involved a low-dose CT scan without contrast to correct for attenuation. Additional PET/CT images in prone position were acquired for the assessment of uptake in the primary tumor. Increased FDG uptake, exclusively seen on FDG-PET/CT and not corresponding to physiological uptake patterns or...
2021年WHO肺肿瘤新分类(以下简称新分类)将肺上皮性肿瘤分为腺体前驱病变[包括不典型腺瘤样增生(atypical adenomatous hyperplasia,AAH)和原位腺癌(adenocarcinoma in situ,AIS)]、微浸润性腺癌(minimally invasive adenocarcinoma,MIA)、浸润性腺癌(invasive adenocarcinoma,IAC) [ 7 ] 。既往研究显示,腺体前驱病变可随访...
(A) Routine scan: FOV 400 mm, matrix 512×512; (B) Target scan: FOV 180 mm, matrix 1 024×1 024. 1.4 影像组学建模 使用PyRadioimics提取每个肺结节共788个 影像组学特征,该788个影像组学特征包括以下 六类.一阶特征:能量,总能量,熵等;形状 特征:表面积,像素表面,周长,周长与表面 积比等,灰度...
We propose a novel DL-based CT-free AC approach for cardiac SPECT, which can generate AC images without the need for a CT scan. By leveraging multi-scale features from both NAC SPECT and CT, the performance of CT-free AC is significantly enhanced, offering a promising alternative for future...
that produces images with appropriate contrast for distinguishing soft tissues of interest for downstream image analyses; b) scanning of specimens: our protocol used settings to scan multiple individuals at once to reduce cost and machine running time while still producing high quality images; c) imag...
Methods: Eighty patients with IA stage IAC were enrolled, with a total of 82 GGNs. All patients underwent a preoperative 18F-FDG PET-CT diagnostic scan and a histopathological examination (the rare micropapillary and solid predominant were not included). The LIFEx package (version 5.10, http:...
1). Patients received a total of 18 g iodine for the contrast enhanced scan (Protocol B). II. Scan protocol for patients with impaired renal function and anuria: a. If there was a necessity of evaluating the patients’ central drainage, patients’ AVF/AVG extremity was angulated by ...
Several studies have documented 2-[18F]FDG PET/CT’s utility compared to other imaging modalities including bone scan and contrast-enhanced CT (ceCT). However, the superiority of 2-[18F]FDG PET/CT is still unclear in comparison with whole-body magnetic resonance imaging (wbMRI) [33,34,35,...
scan.CTcouldfullydisplaythefeedingarteries,refluxveins,lacunaofartery,pseudoaneurysmscavity andthesurroundingsituationofvascular,tissuesandorgans.(~)Ultrasoundcoulddisplaythefeedingar— teries,refluxveins,thesurroundingtissuesandorgansinall5cases.Italsomeasuredthebloodflow ...