Objective To explore the value of MRI histogram analysis in the risk assessment of medulloblastoma recur rence.Methods The data of 28 patients pathologically confirmed of medulloblastoma was analyzed retrospectively.All patients were divided into recurrent group and the non recurrent group (each n=14).The ROIs were drawn on the maximum level of enhanced MR sagittal images,and the histogram analysis were performed using the software named Mazda.The statistical analysis was performed on the histogram parameters to find out the different characteristics between the two groups,and the ROC curve was drawn to evaluate its diagnostic efficacy for recurrence of medulloblastoma.Results In all of the 9 parameters which are extracted from histogram,kurtosis had statistical significance between the 2 groups (P=0.018).The area under the ROC curve was 0.776 (P=0.018),and the sensitivity and specificity of kurtosis in the risk assessment of medulloblastoma recurrence were 64.3％ and 71.4％,respectively.Conclusion MRI histogram analysis can be an important method to assess the risk of medulloblastoma recurrence.

Objective To study the influence factors of real-time shear wave elastography(SWE) on the elasticity of focal liver lesions (FLLs) measurement.Methods The mean Young's modulus of 160 FLLs were measured by SWE.The relation between elasticity with different aspects of FLLs were analyzed including postures (supine and left lateral position),respiratory phases (end of inspiratory and expiratory),the probe position (rib and intercostal space) and different operators.Results There were significant differences between different postures and respiratory phases in the elasticity measurement of FLLs by SWE (P ＜0.05).There was no significant difference between robe position and different operators in the elasticity measurement of FLLs by SWE(P ＞0.05).Conclusions The postures and respiratory phases can impact the elasticity measurement of FLLs by SWE.

Objective To analyse the risk factors of medical complications after hip fracture surgery.Methods Clinical data of 327 hip fracture patients undergoing surgical treatment in Beijing Haidian Hospital from January 2009 to December 2013 were retrospectively studied.There were 114 males and 213 females with a mean age of (75.1 ±15.6) years, 129 patients(39.4%) had femoral neck fractures, and 198 patients ( 60.6%) had intertrochanteric fractures.Fifty four patients had medical complications during hospitalization ( complication group) and 273 patients did not have complications ( non-complications group ) . The clinical features, presurgical comorbidities and operative parameters were documented and compared between two groups.The risk factors of medical complications were assessed by regression analysis.Results Univariate analysis showed that age ( t =2.85, P=0.007), lying in bed before fracture(χ2 =12.86,P =0.000), the history of chronic obstructive pulmonary diseases(COPD) (χ2 =9.45, P=0.000), coronary heart disease(χ2 =10.67,P=0.000), heart failure(χ2 =15.85,P=0.000), diabetes (χ2 =3.22,P=0.024), cerebrovascular disease(χ2 =4.21,P=0.008), anesthesia method(χ2 =8.67,P=0.018), American Society of Anesthesiologists(ASA) score ≥3 level(χ2 =2.01, P=0.042) and the delay time of operation (t=4.24, P=0.037) were significantly different between two groups.Multivariate regression analysis revealed that age(β=0.030, OR=1.030), lying in bed before fracture (β=2.303, OR=10.716), the history of COPD (β=0.831, OR =1.995), coronary heart disease(β=0.858, OR=2.392), heart failure(β=1.971, OR=7.333)and ASA score ≥3 level(β=0.809,OR=2.583) were the independent risk factors of medical complications after hip fracture surgery. Conclusion Age, lying in bed before fracture, the history of COPD, coronary heart disease, heart failure and ASA score≥3 level would increase the risk of postoperative medical complications for patients with hip fracture.

Objective To evaluate the diagnostic value of multi-slice three-dimensional computed tomographic angiography(MS 3D-CTA)for vertebrobasilar dolichoectasia(VBD).Methods MS 3D-CTA of 10 patients with VBD were retrospectively analysed.Source images were got by GE Lightspeed pro scanner.Volume rendering(VR)and maximum intensity project (MIP) were adopted to reconstruct 3D images in all cases.Twenty patients were selected as the control group by suspected cerebra[vascular diseases and underwent MS 3D-CTA at the same period.Enumeration data between the patient group and the control group was assessed by Wilcoxon.test.Results There were 2 types of 10 cases with VBD,including simple type(n=4)and saddle type(n=6).Compared with the control group of the length of the basilar artery(B 1,25.60 mm),the deviant degree(Bc,1.20 mm),the height(Bh,1.90 am),the length of the vertebral artery (V1,17.55 mm),the deviant degree(Vc,2.05 mm),and the diameter of BA and/or VA (Bw/Vw,3.05 mm),there is significant difference in the B1 30.20 mm,Bc 7.10 mm,Bh 8.80 mm,V1 23.00 mm,Vc 5.95 mm,and Bw/Vw 5.05 mm(P＜0.01,all).Conclusion The clinical performances of VBD is different,MS 3D-CTA is a very effective method for the diagnosis of VBD.

30%) might be a risk factor in HAPE susceptibility.

From December 2019, Coronavirus disease 2019 (COVID-19) pneumonia (formerly known as the 2019 novel Coronavirus [2019-nCoV]) broke out in Wuhan, China. In this study, we present serial CT findings in a 40-year-old female patient with COVID-19 pneumonia who presented with the symptoms of fever, chest tightness, and fatigue. She was diagnosed with COVID-19 infection confirmed by real-time reverse-transcriptase-polymerase chain reaction. CT showed rapidly progressing peripheral consolidations and ground-glass opacities in both lungs. After treatment, the lesions were shown to be almost absorbed leaving the fibrous lesions.
Adult ; China ; Coronavirus ; Fatigue ; Female ; Fever ; Humans ; Lung ; Pneumonia ; Thorax ; Tomography, X-Ray Computed

From December 2019, Coronavirus disease 2019 (COVID-19) pneumonia (formerly known as the 2019 novel Coronavirus [2019-nCoV]) broke out in Wuhan, China. In this study, we present serial CT findings in a 40-year-old female patient with COVID-19 pneumonia who presented with the symptoms of fever, chest tightness, and fatigue. She was diagnosed with COVID-19 infection confirmed by real-time reverse-transcriptase-polymerase chain reaction. CT showed rapidly progressing peripheral consolidations and ground-glass opacities in both lungs. After treatment, the lesions were shown to be almost absorbed leaving the fibrous lesions.

Objective    To further understand the anatomical characteristics and rules of left upper lingual pulmonary artery. Methods    CT data of 120 patients (82 males, 38 females, median age of 65 years ranging 36-78 years) with pulmonary nodules from December 2018 to August 2020 in our hospital were retrospectively analyzed. The anatomic characteristics of the lingual segment of the upper left lung were analyzed by three-dimensional reconstruction. Results    Mediastinal lingual artery appeared in 34 of the 120 patients, accounting for 28.4%. There were 26 patients of mixed mediastinal/interlobar type, 8 patients of pure mediastinal lingual artery, and 92.3% (24/26) mixed mediastinal/interlobar type blood vessel contained A4b. Fifty-eight (58/120, 48.3%) patients had interlobar type A4+5 type, the rest were two-branches type. And 22 patients of A4 and A5 type accounted for the most two-branches type (22/28, 78.6%). The single-branch type was located at the distal end of A6 in 54 (54/58, 93.1%) patients, originated from the proximal end of A6 in 4 patients, and originated from the basilar artery in 6 patients. The two-branches type was at the distal end of A6 accounting for 50.0% (14/28). Conclusion    Mediastinal lingual artery is more common than expected, accounting for 28.4%, among which mixed lingual artery is more prevalent, usually located in the first pulmonary trunk, and mostly follows the principle of proximity to supply relevant lung tissues. The location of the interlobar branches in the pulmonary trunk can be at the distal or proximal end of A6, care should be taken to avoid damaging adjacent structures.

Objective:The nasal swell body（NSB） consists of the nasal septal cartilage, nasal bone, and swollen soft tissue, all of which are visible during endoscopic and imaging examinations. Although the function of the NSB remains uncertain, there is evidence to suggest that it plays a vital role in regulating nasal airflow and filtering inhaled air. Based on anatomical and histological evidence, it is hypothesized that the NSB is indispensable in these processes. This study aims to investigate the impact of NSB on nasal aerodynamics and the deposition of allergen particles under physiological conditions. Methods:The three-dimensional （3D） nasal models were reconstructed from computed tomography （CT） scans of the paranasal sinus and nasal cavity in 30 healthy adult volunteers from Northwest China, providing basis for the construction of models without NSB following virtual NSB-removal surgery. To analyze the distribution of airflow in the nasal cavity, nasal resistance, heating and humidification efficiency, and pollen particle deposition rate at various anatomical sites, we employed the computed fluid dynamics（CFD） method for numerical simulation and quantitative analysis. In addition, we created fully transparent segmented nasal cavity models through 3D printing, which were used to conduct bionic experiments to measure nasal resistance and allergen particle deposition. Results:①The average width and length of the NSB in healthy adults in Northwest China were （12.85±1.74） mm and （28.30±1.92） mm, respectively. ②After NSB removal, there was no significant change in total nasal resistance, and cross-sectional airflow velocity remained essentially unaltered except for a decrease in topical airflow velocity in the NSB plane. ③There was no discernible difference in the nasal heating and humidification function following the removal of the NSB; ④After NSB removal, the deposition fraction（DF） of Artemisia pollen in the nasal septum decreased, and the DFs post-and pre-NSB removal were（22.79±6.61）% vs （30.70±12.27）%, respectively; the DF in the lower airway increased, and the DFs post-and pre-NSB removal were（24.12±6.59）% vs （17.00±5.57）%, respectively. Conclusion:This study is the first to explore the effects of NSB on nasal airflow, heating and humidification, and allergen particle deposition in a healthy population. After NSB removal from the healthy nasal cavities: ①nasal airflow distribution was mildly altered while nasal resistance showed no significantly changed; ②nasal heating and humidification were not significantly changed; ③the nasal septum's ability to filter out Artemisia pollen was diminished, which could lead to increased deposition of Artemisia pollen in the lower airway.
Adult ; Humans ; Cross-Sectional Studies ; Nasal Cavity/surgery* ; Allergens ; Pollen ; Artemisia ; Hydrodynamics