ObjectiveTo evaluate the effectiveness of Cross-Union surgery for the treatment of pseudarthrosis of the tibia (PT) with neurofibromatosis type 1 (NF1). MethodsThe clinical data of 8 children of PT with NF1 who met the selection criteria between January 2018 and December 2023 was retrospectively analyzed. There were 5 boys and 3 girls, and the operative age ranged from 1.8 to 13.3 years with a median age of 3.5 years. According to Paley classification, there were 2 cases of type 2a, 2 cases of type 3, 2 cases of type 4a, and 2 cases of type 4c. There were 5 cases of first operation and 3 cases of re-fracture after previous operation. Six cases had leg length discrepancy before operation, and 2 of them had shortening over 2.0 cm. Except for 1 case of ankle fusion, the other 7 cases had ankle valgus. Preoperative coronal/sagittal angulation was recorded. Postoperative pseudarthrosis healing and refracture were observed. Leg length discrepancy and tibiotalar angle were measured and recorded before operation and at last follow-up. Inan imaging evaluation criteria was used to evaluate the imaging effect. ResultsAll patients were followed up 12-37 months (mean, 23.5 months). One pseudarthrosis failed to heal at 12 months after operation and healed at 3 months after reoperation, while the other pseudarthrosis healed with a healing rate of 87.5% and a healing time of 4-8 months (mean, 5.3 months). No refracture occurred during the follow-up. At last follow-up, there were 2 new cases with leg length discrepancy, which were 0.7 cm and 1.3 cm, respectively. In 2 cases with the leg length discrepancy more than 2.0 cm before operation, the improvement was from 4.1 cm and 12.6 cm to 2.1 cm and 9.0 cm, respectively. There was no significant difference in leg length discrepancy between pre- and post-operation in 8 cases (P>0.05). At last follow-up, 6 patients still had ankle valgus, and there was no significant difference in the tibiotalar angle between pre- and post-operation (P>0.05); the tibial coronal/sagittal angulation significantly improved when compared with that before operation (P<0.05). According to Inan imaging evaluation criteria, 1 case was good, 6 cases were fair, and 1 case was poor. Conclusion Cross-Union surgery is an effective method for the treatment of PT with NF1 in children, can achieve good bone healing results with a low risk of re-fracture. The surgery may not have significant effects on leg length discrepancy and ankle valgus, and further treatment may be required.
Objective To review the value of imaging assessment for perioperative period of liver transplantation. Methods The related literatures in recent years were reviewed, and the applications of various kinds of radiological techniques in perioperative period of liver transplantation and radiological strategies of major complications after liver transplantation were summarized. Results Transplantation has become an effective option for treatment of patients with irreversible severe liver dysfunction. Radiological assessment supplies prompt and accurate information for clinic to increase the success rate and reduce the complications. So it plays an irreplaceable role. Conclusions Radiology assessment is important for screening donors and recipients before liver transplantation， following up and monitoring the complications. The doctor of imaging department could grasp the different imaging appearance in perioperative period of liver transplantation.
Mitral stenosis includes mitral stenosis due to rheumatic fever and non-rheumatic valve stenosis characterized by degenerative changes. Rheumatic mitral stenosis is common in developing countries and occurs in young adults, while degenerative mitral stenosis is common in developed countries and increases in incidence with aging. Mitral stenosis of different etiologies can lead to changes in heart structure and function, which affects the quality of life and prognosis of patients, so lifelong management of mitral stenosis is crucial. This article provides a comprehensive reference for clinicians in the management of mitral stenosis, with a detailed overview of the emerging prevalence features, imaging diagnosis, and treatment methods.
Objective To analyze the imaging features of solitary pulmonary nodules ( SPNs) , and compare the two types of lung cancer prediction models in distinguishing malignancy of SPNs.Methods A retrospective study was performed on the patients admitted to Ruijin Hospital between 2002 and 2009 with newly discovered SPNs. The patients all received pathological diagnosis. The clinical and imaging characteristics were analyzed. Then the diagnostic accuracy of two lung cancer prediction models for distinguishing malignancy of SPNs was evaluated and compared.Results A total of 90 patients were enrolled, of which 32 cases were with benign SPNs, 58 cases were with malignant SPNs. The SPNs could be identified between benign and maligant by the SPN edge features of lobulation ( P lt;0. 05) . The area under ROC curve of VA model was 0. 712 ( 95% CI 0. 606 to 0. 821) . The area under ROC curve of Mayo Clinic model was 0. 753 ( 95% CI 0. 652 to 0. 843) , which was superior to VA model. Conclusions It is meaningful for the identification of benign and maligant SPNs by the obulation sign in CT scan. We can integrate the clinical features and the lung cancer predicting models to guide clinical work.
Objective To evaluate the value of 16slice spiral computed tomography (SCT) and its threedimensional reconstruction in diagnosis of aortic dissection (AD). Methods Fortyfive cases with AD underwent 16slice SCT, performed with unenhanced, contrastenhanced scanning and threedimensional reconstructions. Emphasis was placed on the true and false lumen, intimal flap, the entry and reentry tear and the involvement of branches of AD. Eleven cases were confimed by operation. Results True and false lumen and intimal flap of AD could be shown in all 45 cases (100%), the entry and reentry tears were revealed in 44 cases (97.8%) and 33 cases (73.3%), respectively. The right common iliac arteries were most easily involved by AD, 21 cases (46.7%). The thrombi in false lumen were shown in 29 cases (64.4%). Compared with surgery, the location and size of initial entry sites of 11 cases were consistent with the former. Conclusion 16slice SCT can exactly and completely diagnose AD, and provide detailed imaging information for clinical therapy. It’s very important for the selection of treatment methods and the observation of curative effect of patients.
目的 探讨脾占位性病变的临床诊断特点和治疗对策。方法 回顾性分析68例脾占位性病变患者的临床资料。结果 超声和CT是诊断脾占位性病变的主要方法。68例脾占位性病变中良性48例，恶性20例。手术治疗47例，其中脾切除37例，脾切除加胰尾切除2例，脾部分切除3例，脾切除加脾窝引流4例，单纯脾囊肿去顶减压1例。1例脾脓肿行脾切除术后发生肺部感染，经抗感染治疗后痊愈； 1例脾脓肿行脾切除术后，发生脾窝脓肿，感染严重，被迫再次开腹行脓肿引流术，其余良性病变经手术治疗后效果好； 恶性病变术后效果差。结论 脾占位性病变良性多见，恶性少见； 影像学检查是诊断脾占位性病变的主要手段。脾切除对成年人是一种有效的治疗方法，良性预后好，恶性预后差； 对儿童、青少年脾良性病变，脾部分切除是一种很好的选择。
With the exacerbation of aging population in China, the number of patients with Alzheimer's disease (AD) is increasing rapidly. AD is a chronic but irreversible neurodegenerative disease, which cannot be cured radically at present. In recent years, in order to intervene in the course of AD in advance, many researchers have explored how to detect AD as early as possible, which may be helpful for effective treatment of AD. Imaging genomics is a kind of diagnosis method developed in recent years, which combines the medical imaging and high-throughput genetic omics together. It studies changes in cognitive function in patients with AD by extracting effective information from high-throughput medical imaging data and genomic data, providing effective guidance for early detection and treatment of AD patients. In this paper, the association analysis of magnetic resonance image (MRI) with genetic variation are summarized, as well as the research progress on AD with this method. According to complexity, the objects in the association analysis are classified as candidate brain phenotype, candidate genetic variation, genome-wide genetic variation and whole brain voxel. Then we briefly describe the specific methods corresponding to phenotypic of the brain and genetic variation respectively. Finally, some unsolved problems such as phenotype selection and limited polymorphism of candidate genes are put forward.
Peripheral exudative hemorrhagic chorioretinopathy (PEHCR) is a peripheral retinal disease characterized by subretinal hemorrhage and/or subretinal pigment epithelial hemorrhage or exudation. It is often misdiagnosed as age-related macular degeneration, polypoidal chorioretinopathy or choroidal melanoma. With the development of multimodal imaging, PEHCR has different features under different examinations, such as B-scan ultrasound, fluorescein fundus angiography, optical coherence tomography and so on, which contributes to differention from other diseases. Clinical treatments for the disease include intravitreal injection of retinal photocoagulation therapy, anti-vascular endothelial growth factor, pars plana vitrectomyand so on, but there is still no universal consensus. In order to gain a deeper understanding of the clinical features, treatment options and prognosis of PEHCR, minimize missed diagnoses and misdiagnoses, and improve treatment efficiency, further research is required.
Objective To review the value of imaging assessment of stem cell transplantation in treatment for liver cirrhosis.Methods The related literatures in recent years were collected,and the applications of different radiological techniques and strategies of stem cell transplantation in treatment for liver cirrhosis were summarized.Results Stem cell transplantation in treatment for liver cirrhosis was feasible and effective. Radiological assessment could supply the prompt and accurate information for clinic to choose the proper therapeutic method.The curative effect could also be accurately assessed by radiological techniques.Conclusion Radiological examination is important for the assessment of stem cell transplantation in treatment for liver cirrhosis.
We in the present research proposed a classification method that applied infomax independent component analysis (ICA) to respectively extract single modality features of structural magnetic resonance imaging (sMRI) and positron emission tomography (PET). And then we combined these two features by using a method of weight combination. We found that the present method was able to improve the accurate diagnosis of Alzheimer's disease (AD) and mild cognitive impairment (MCI). Compared AD to healthy controls (HC): the study achieved a classification accuracy of 93.75%, with a sensitivity of 100% and a specificity of 87.64%. Compared MCI to HC: classification accuracy was 89.35%, with a sensitivity of 81.85% and a specificity of 99.36%. The experimental results showed that the bi-modality method performed better than the individual modality in comparison to classification accuracy.