To investigate the correlation between computed tomography (CT) image characteristics of multiple lung ground-glass nodules (GGNs) and pathological classification, the CT image data of multiple lung GGN patients confirmed by pathology ( n = 132 ) in our hospital were collected. The imaging features of GGNs were analyzed by qualified physicians, including lesion size (diameter, volume, and mass), location, CT values (mean and relative CT values), lesion morphology (round and irregular), marginal structure (pagination and burr), internal structure (bronchial inflation sign), and adjacent structure (pleural depression). CT imaging analysis was performed for the subtype of infiltrating adenocarcinoma (IAC). In CT findings, GGNs were greatly different from adenomatous hyperplasia (AAH), pure GGN adenocarcinoma in situ (AIS), and microinvasive adenocarcinoma (MIA) in terms of marginal structure, lesion morphology, internal structure, adjacent structure, and size ( P < 0.05 ). The mean and relative CT values of mural adenocarcinoma, acinar adenocarcinoma, and papillary adenocarcinoma of IAC subtypes were greatly different from those of AAH/AIS/MIA ( P < 0.05 ). In summary, the CT images of GGNs can be used as the basis for the differentiation of AAH, AIS, and MIA early noninvasive types and IAC invasive types, and the CT value of the IAC subtype can be used as the basis for the classification and differentiation of IAC pathological subtypes.
The purpose of this article is to investigate the value of cardiac magnetic resonance imaging (CMR) derived left ventricular strain parameters in evaluation of ischemic cardiomyopathy (ICM). Thirty-one ICM patients and nineteen non-cardiomyopathy (non-CM) patients who performed CMR examinations during the same period were selected for this retrospective study. The basic clinical data, CMR left ventricular function parameters, left ventricular strain parameters were compared among the left ventricular ejection fraction (LVEF) preserved ICM group, the LVEF impaired ICM group and the non-CM group. The differences of MyoGCS (-21.9 ± 1.9 vs -18.9 ± 2.7 P<0.001), MyoGLS (-20.8 ± 2.3 vs -17.0 ± 2.9 P<0.001) and EndoGLS (-22.2 ± 3.1 vs -17.6 ± 3.7 P<0.001) between LVEF preserved ICM group and non-CM group were statistically signi cant, while the differences of left heart function parameters between the two groups were not statistically signi cant (P > 0.05). The left ventricular strain analysis can be used to assess cardiac functional and morphological alterations in ICM patients prior to changes of left ventricular function parameters, which has high clinical signi cance.
Objective: To evaluate the value of preoperative CT energy spectrum imaging in detecting lymph nodes metastasis around colorectal cancer.Methods: From 2019 September to 2021 November, a retrospective study was performed for the eighty-two patients with colorectal cancer through preoperative colonoscopy or surgical pathology confirmed in our hospital. The patients were divided into lymph node metastasis group and lymph node non metastasis group according to whether lymph node metastasis occurred. GE Revolution CT scanner was used to scan the patients with energy spectrum imaging, it measured and recorded the single energy CT values from 40kev to 140kev and various energy spectrum parameters of lymph nodes around the lesions in the arterial and venous phase. And statistically analyze the above indices.Result: In the arterial and venous phase: the single energy CT values of 40kev~140kev in the non metastatic group were higher than those in the metastatic group (all P<0.05); The parameter values of IC, NIC, λ, Eff-Z in the non metastatic group were higher than those in the metastatic group (all P<0.05). Further evaluation of ROC curve showed that the higher AUC of the single energy CT value of 50kev in the arterial phase was 0.889, among the energy spectrum parameters of IC, NIC, λ, Eff-Z, the NIC had the better diagnostic efficiency and the AUC of the NIC was 0.873, the highest AUC of the combination of NIC and λ was 0.885 when the energy spectrum parameters were combined. The higher AUC of the single energy CT value of 60kev in the venous phase was 0.853, among the energy spectrum parameters of IC, NIC, λ, Eff-Z, the λ had the better diagnostic efficiency and the AUC of the λ was 0.822, the higher AUC of the combination of NIC, λ and Eff-Z was 0.840 when the energy spectrum were combined.Conclusion: Single energy CT values from 40keV~140keV and IC, NIC, λ, Eff-Z spectral parameters for energy spectral CT imaging were of high value for evaluating whether lymph nodes around colorectal cancer metastasize, and provide clinicians with more reliable image information before surgery.
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